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CVE-2022-49179 (GCVE-0-2022-49179)

Vulnerability from cvelistv5 – Published: 2025-02-26 01:55 – Updated: 2026-08-12 23:58
VLAI
Title
block, bfq: don't move oom_bfqq
Summary
In the Linux kernel, the following vulnerability has been resolved: block, bfq: don't move oom_bfqq Our test report a UAF: [ 2073.019181] ================================================================== [ 2073.019188] BUG: KASAN: use-after-free in __bfq_put_async_bfqq+0xa0/0x168 [ 2073.019191] Write of size 8 at addr ffff8000ccf64128 by task rmmod/72584 [ 2073.019192] [ 2073.019196] CPU: 0 PID: 72584 Comm: rmmod Kdump: loaded Not tainted 4.19.90-yk #5 [ 2073.019198] Hardware name: QEMU KVM Virtual Machine, BIOS 0.0.0 02/06/2015 [ 2073.019200] Call trace: [ 2073.019203] dump_backtrace+0x0/0x310 [ 2073.019206] show_stack+0x28/0x38 [ 2073.019210] dump_stack+0xec/0x15c [ 2073.019216] print_address_description+0x68/0x2d0 [ 2073.019220] kasan_report+0x238/0x2f0 [ 2073.019224] __asan_store8+0x88/0xb0 [ 2073.019229] __bfq_put_async_bfqq+0xa0/0x168 [ 2073.019233] bfq_put_async_queues+0xbc/0x208 [ 2073.019236] bfq_pd_offline+0x178/0x238 [ 2073.019240] blkcg_deactivate_policy+0x1f0/0x420 [ 2073.019244] bfq_exit_queue+0x128/0x178 [ 2073.019249] blk_mq_exit_sched+0x12c/0x160 [ 2073.019252] elevator_exit+0xc8/0xd0 [ 2073.019256] blk_exit_queue+0x50/0x88 [ 2073.019259] blk_cleanup_queue+0x228/0x3d8 [ 2073.019267] null_del_dev+0xfc/0x1e0 [null_blk] [ 2073.019274] null_exit+0x90/0x114 [null_blk] [ 2073.019278] __arm64_sys_delete_module+0x358/0x5a0 [ 2073.019282] el0_svc_common+0xc8/0x320 [ 2073.019287] el0_svc_handler+0xf8/0x160 [ 2073.019290] el0_svc+0x10/0x218 [ 2073.019291] [ 2073.019294] Allocated by task 14163: [ 2073.019301] kasan_kmalloc+0xe0/0x190 [ 2073.019305] kmem_cache_alloc_node_trace+0x1cc/0x418 [ 2073.019308] bfq_pd_alloc+0x54/0x118 [ 2073.019313] blkcg_activate_policy+0x250/0x460 [ 2073.019317] bfq_create_group_hierarchy+0x38/0x110 [ 2073.019321] bfq_init_queue+0x6d0/0x948 [ 2073.019325] blk_mq_init_sched+0x1d8/0x390 [ 2073.019330] elevator_switch_mq+0x88/0x170 [ 2073.019334] elevator_switch+0x140/0x270 [ 2073.019338] elv_iosched_store+0x1a4/0x2a0 [ 2073.019342] queue_attr_store+0x90/0xe0 [ 2073.019348] sysfs_kf_write+0xa8/0xe8 [ 2073.019351] kernfs_fop_write+0x1f8/0x378 [ 2073.019359] __vfs_write+0xe0/0x360 [ 2073.019363] vfs_write+0xf0/0x270 [ 2073.019367] ksys_write+0xdc/0x1b8 [ 2073.019371] __arm64_sys_write+0x50/0x60 [ 2073.019375] el0_svc_common+0xc8/0x320 [ 2073.019380] el0_svc_handler+0xf8/0x160 [ 2073.019383] el0_svc+0x10/0x218 [ 2073.019385] [ 2073.019387] Freed by task 72584: [ 2073.019391] __kasan_slab_free+0x120/0x228 [ 2073.019394] kasan_slab_free+0x10/0x18 [ 2073.019397] kfree+0x94/0x368 [ 2073.019400] bfqg_put+0x64/0xb0 [ 2073.019404] bfqg_and_blkg_put+0x90/0xb0 [ 2073.019408] bfq_put_queue+0x220/0x228 [ 2073.019413] __bfq_put_async_bfqq+0x98/0x168 [ 2073.019416] bfq_put_async_queues+0xbc/0x208 [ 2073.019420] bfq_pd_offline+0x178/0x238 [ 2073.019424] blkcg_deactivate_policy+0x1f0/0x420 [ 2073.019429] bfq_exit_queue+0x128/0x178 [ 2073.019433] blk_mq_exit_sched+0x12c/0x160 [ 2073.019437] elevator_exit+0xc8/0xd0 [ 2073.019440] blk_exit_queue+0x50/0x88 [ 2073.019443] blk_cleanup_queue+0x228/0x3d8 [ 2073.019451] null_del_dev+0xfc/0x1e0 [null_blk] [ 2073.019459] null_exit+0x90/0x114 [null_blk] [ 2073.019462] __arm64_sys_delete_module+0x358/0x5a0 [ 2073.019467] el0_svc_common+0xc8/0x320 [ 2073.019471] el0_svc_handler+0xf8/0x160 [ 2073.019474] el0_svc+0x10/0x218 [ 2073.019475] [ 2073.019479] The buggy address belongs to the object at ffff8000ccf63f00 which belongs to the cache kmalloc-1024 of size 1024 [ 2073.019484] The buggy address is located 552 bytes inside of 1024-byte region [ffff8000ccf63f00, ffff8000ccf64300) [ 2073.019486] The buggy address belongs to the page: [ 2073.019492] page:ffff7e000333d800 count:1 mapcount:0 mapping:ffff8000c0003a00 index:0x0 compound_mapcount: 0 [ 2073.020123] flags: 0x7ffff0000008100(slab|head) [ 2073.020403] raw: 07ffff0000008100 ffff7e0003334c08 ffff7e00001f5a08 ffff8000c0003a00 [ 2073.020409] ra ---truncated---
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-02-27 17:59 UTC
CWE
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 0d52af590552473666da5b6111e7182d6cd23f92 , < c4f5a678add58a8a0e7ee5e038496b376ea6d205 (git)
Affected: 0d52af590552473666da5b6111e7182d6cd23f92 , < 7507ead1e9d42957c2340f2c4a0e9d00034e3366 (git)
Affected: 0d52af590552473666da5b6111e7182d6cd23f92 , < 8f34dea99cd7761156a146a5258a67d045d862f7 (git)
Affected: 0d52af590552473666da5b6111e7182d6cd23f92 , < 87fdfe8589d43e471dffb4c60f75eeb6f37afc4c (git)
Affected: 0d52af590552473666da5b6111e7182d6cd23f92 , < c01fced8d38fbccc82787065229578006f28e020 (git)
Affected: 0d52af590552473666da5b6111e7182d6cd23f92 , < 8410f70977734f21b8ed45c37e925d311dfda2e7 (git)
guessed Create a notification for this product.
Linux Linux Affected: 4.16
Unaffected: 0 , < 4.16 (semver)
Unaffected: 5.4.189 , ≤ 5.4.* (semver)
Unaffected: 5.10.110 , ≤ 5.10.* (semver)
Unaffected: 5.15.33 , ≤ 5.15.* (semver)
Unaffected: 5.16.19 , ≤ 5.16.* (semver)
Unaffected: 5.17.2 , ≤ 5.17.* (semver)
Unaffected: 5.18 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "LOCAL",
              "availabilityImpact": "HIGH",
              "baseScore": 7.8,
              "baseSeverity": "HIGH",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "HIGH",
              "privilegesRequired": "LOW",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2022-49179",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-02-27T17:59:03.662860Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-416",
                "description": "CWE-416 Use After Free",
                "lang": "en",
                "type": "CWE"
              }
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        ],
        "providerMetadata": {
          "dateUpdated": "2025-02-27T18:02:29.552Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "block/bfq-cgroup.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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            {
              "lessThan": "7507ead1e9d42957c2340f2c4a0e9d00034e3366",
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            {
              "lessThan": "87fdfe8589d43e471dffb4c60f75eeb6f37afc4c",
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            {
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            {
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              "versionType": "git"
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          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
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          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.16"
            },
            {
              "lessThan": "4.16",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.189",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.110",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.33",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.16.*",
              "status": "unaffected",
              "version": "5.16.19",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.17.*",
              "status": "unaffected",
              "version": "5.17.2",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "5.18",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.4.189",
                  "versionStartIncluding": "4.16",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.110",
                  "versionStartIncluding": "4.16",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.33",
                  "versionStartIncluding": "4.16",
                  "vulnerable": true
                },
                {
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                  "versionEndExcluding": "5.16.19",
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                  "vulnerable": true
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                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                  "versionStartIncluding": "4.16",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.18",
                  "versionStartIncluding": "4.16",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nblock, bfq: don\u0027t move oom_bfqq\n\nOur test report a UAF:\n\n[ 2073.019181] ==================================================================\n[ 2073.019188] BUG: KASAN: use-after-free in __bfq_put_async_bfqq+0xa0/0x168\n[ 2073.019191] Write of size 8 at addr ffff8000ccf64128 by task rmmod/72584\n[ 2073.019192]\n[ 2073.019196] CPU: 0 PID: 72584 Comm: rmmod Kdump: loaded Not tainted 4.19.90-yk #5\n[ 2073.019198] Hardware name: QEMU KVM Virtual Machine, BIOS 0.0.0 02/06/2015\n[ 2073.019200] Call trace:\n[ 2073.019203]  dump_backtrace+0x0/0x310\n[ 2073.019206]  show_stack+0x28/0x38\n[ 2073.019210]  dump_stack+0xec/0x15c\n[ 2073.019216]  print_address_description+0x68/0x2d0\n[ 2073.019220]  kasan_report+0x238/0x2f0\n[ 2073.019224]  __asan_store8+0x88/0xb0\n[ 2073.019229]  __bfq_put_async_bfqq+0xa0/0x168\n[ 2073.019233]  bfq_put_async_queues+0xbc/0x208\n[ 2073.019236]  bfq_pd_offline+0x178/0x238\n[ 2073.019240]  blkcg_deactivate_policy+0x1f0/0x420\n[ 2073.019244]  bfq_exit_queue+0x128/0x178\n[ 2073.019249]  blk_mq_exit_sched+0x12c/0x160\n[ 2073.019252]  elevator_exit+0xc8/0xd0\n[ 2073.019256]  blk_exit_queue+0x50/0x88\n[ 2073.019259]  blk_cleanup_queue+0x228/0x3d8\n[ 2073.019267]  null_del_dev+0xfc/0x1e0 [null_blk]\n[ 2073.019274]  null_exit+0x90/0x114 [null_blk]\n[ 2073.019278]  __arm64_sys_delete_module+0x358/0x5a0\n[ 2073.019282]  el0_svc_common+0xc8/0x320\n[ 2073.019287]  el0_svc_handler+0xf8/0x160\n[ 2073.019290]  el0_svc+0x10/0x218\n[ 2073.019291]\n[ 2073.019294] Allocated by task 14163:\n[ 2073.019301]  kasan_kmalloc+0xe0/0x190\n[ 2073.019305]  kmem_cache_alloc_node_trace+0x1cc/0x418\n[ 2073.019308]  bfq_pd_alloc+0x54/0x118\n[ 2073.019313]  blkcg_activate_policy+0x250/0x460\n[ 2073.019317]  bfq_create_group_hierarchy+0x38/0x110\n[ 2073.019321]  bfq_init_queue+0x6d0/0x948\n[ 2073.019325]  blk_mq_init_sched+0x1d8/0x390\n[ 2073.019330]  elevator_switch_mq+0x88/0x170\n[ 2073.019334]  elevator_switch+0x140/0x270\n[ 2073.019338]  elv_iosched_store+0x1a4/0x2a0\n[ 2073.019342]  queue_attr_store+0x90/0xe0\n[ 2073.019348]  sysfs_kf_write+0xa8/0xe8\n[ 2073.019351]  kernfs_fop_write+0x1f8/0x378\n[ 2073.019359]  __vfs_write+0xe0/0x360\n[ 2073.019363]  vfs_write+0xf0/0x270\n[ 2073.019367]  ksys_write+0xdc/0x1b8\n[ 2073.019371]  __arm64_sys_write+0x50/0x60\n[ 2073.019375]  el0_svc_common+0xc8/0x320\n[ 2073.019380]  el0_svc_handler+0xf8/0x160\n[ 2073.019383]  el0_svc+0x10/0x218\n[ 2073.019385]\n[ 2073.019387] Freed by task 72584:\n[ 2073.019391]  __kasan_slab_free+0x120/0x228\n[ 2073.019394]  kasan_slab_free+0x10/0x18\n[ 2073.019397]  kfree+0x94/0x368\n[ 2073.019400]  bfqg_put+0x64/0xb0\n[ 2073.019404]  bfqg_and_blkg_put+0x90/0xb0\n[ 2073.019408]  bfq_put_queue+0x220/0x228\n[ 2073.019413]  __bfq_put_async_bfqq+0x98/0x168\n[ 2073.019416]  bfq_put_async_queues+0xbc/0x208\n[ 2073.019420]  bfq_pd_offline+0x178/0x238\n[ 2073.019424]  blkcg_deactivate_policy+0x1f0/0x420\n[ 2073.019429]  bfq_exit_queue+0x128/0x178\n[ 2073.019433]  blk_mq_exit_sched+0x12c/0x160\n[ 2073.019437]  elevator_exit+0xc8/0xd0\n[ 2073.019440]  blk_exit_queue+0x50/0x88\n[ 2073.019443]  blk_cleanup_queue+0x228/0x3d8\n[ 2073.019451]  null_del_dev+0xfc/0x1e0 [null_blk]\n[ 2073.019459]  null_exit+0x90/0x114 [null_blk]\n[ 2073.019462]  __arm64_sys_delete_module+0x358/0x5a0\n[ 2073.019467]  el0_svc_common+0xc8/0x320\n[ 2073.019471]  el0_svc_handler+0xf8/0x160\n[ 2073.019474]  el0_svc+0x10/0x218\n[ 2073.019475]\n[ 2073.019479] The buggy address belongs to the object at ffff8000ccf63f00\n which belongs to the cache kmalloc-1024 of size 1024\n[ 2073.019484] The buggy address is located 552 bytes inside of\n 1024-byte region [ffff8000ccf63f00, ffff8000ccf64300)\n[ 2073.019486] The buggy address belongs to the page:\n[ 2073.019492] page:ffff7e000333d800 count:1 mapcount:0 mapping:ffff8000c0003a00 index:0x0 compound_mapcount: 0\n[ 2073.020123] flags: 0x7ffff0000008100(slab|head)\n[ 2073.020403] raw: 07ffff0000008100 ffff7e0003334c08 ffff7e00001f5a08 ffff8000c0003a00\n[ 2073.020409] ra\n---truncated---"
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The vulnerable BFQ cgroup path is reached through local block I/O (read/write syscalls) and blkcg association changes on a BFQ-managed queue, not via network packet processing.\nAC:L - An attacker can induce the oom_bfqq fallback via memory pressure they control, then trigger bfq_bfqq_move through cgroup-associated I/O; BFQ with group scheduling is a common real-world configuration, not a rare dependency.\nPR:L - An unprivileged local user can submit I/O on BFQ devices and cause bios/tasks to span blkcgs (app cgroups, writeback, delegated/user scopes); CAP_SYS_ADMIN is not required to reach the buggy move path.\nUI:N - The attacker performs the I/O and cgroup-related actions themselves; no separate victim interaction is required.\nS:U - This is a kernel memory-corruption bug within the host kernel\u0027s authority and does not cross a VM, IOMMU, or other security boundary.\nC:H - The bug is a use-after-free with a confirmed write to a freed bfq_group; UAF control of freed object contents enables arbitrary kernel memory disclosure.\nI:H - The KASAN report shows an 8-byte write to freed memory in __bfq_put_async_bfqq during group teardown, which is exploitable for heap corruption and control-flow hijacking.\nA:H - The use-after-free causes kernel oops/panic during elevator/device teardown and can crash the system even without a full exploit."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-12T23:58:15.467Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/c4f5a678add58a8a0e7ee5e038496b376ea6d205"
        },
        {
          "url": "https://git.kernel.org/stable/c/7507ead1e9d42957c2340f2c4a0e9d00034e3366"
        },
        {
          "url": "https://git.kernel.org/stable/c/8f34dea99cd7761156a146a5258a67d045d862f7"
        },
        {
          "url": "https://git.kernel.org/stable/c/87fdfe8589d43e471dffb4c60f75eeb6f37afc4c"
        },
        {
          "url": "https://git.kernel.org/stable/c/c01fced8d38fbccc82787065229578006f28e020"
        },
        {
          "url": "https://git.kernel.org/stable/c/8410f70977734f21b8ed45c37e925d311dfda2e7"
        }
      ],
      "title": "block, bfq: don\u0027t move oom_bfqq",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-49179",
    "datePublished": "2025-02-26T01:55:32.100Z",
    "dateReserved": "2025-02-26T01:49:39.281Z",
    "dateUpdated": "2026-08-12T23:58:15.467Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2022-49179",
      "date": "2026-09-16",
      "epss": "0.00272",
      "percentile": "0.19623"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2022-49179\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-02-26T07:00:55.037\",\"lastModified\":\"2026-08-13T00:17:30.490\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nblock, bfq: don\u0027t move oom_bfqq\\n\\nOur test report a UAF:\\n\\n[ 2073.019181] ==================================================================\\n[ 2073.019188] BUG: KASAN: use-after-free in __bfq_put_async_bfqq+0xa0/0x168\\n[ 2073.019191] Write of size 8 at addr ffff8000ccf64128 by task rmmod/72584\\n[ 2073.019192]\\n[ 2073.019196] CPU: 0 PID: 72584 Comm: rmmod Kdump: loaded Not tainted 4.19.90-yk #5\\n[ 2073.019198] Hardware name: QEMU KVM Virtual Machine, BIOS 0.0.0 02/06/2015\\n[ 2073.019200] Call trace:\\n[ 2073.019203]  dump_backtrace+0x0/0x310\\n[ 2073.019206]  show_stack+0x28/0x38\\n[ 2073.019210]  dump_stack+0xec/0x15c\\n[ 2073.019216]  print_address_description+0x68/0x2d0\\n[ 2073.019220]  kasan_report+0x238/0x2f0\\n[ 2073.019224]  __asan_store8+0x88/0xb0\\n[ 2073.019229]  __bfq_put_async_bfqq+0xa0/0x168\\n[ 2073.019233]  bfq_put_async_queues+0xbc/0x208\\n[ 2073.019236]  bfq_pd_offline+0x178/0x238\\n[ 2073.019240]  blkcg_deactivate_policy+0x1f0/0x420\\n[ 2073.019244]  bfq_exit_queue+0x128/0x178\\n[ 2073.019249]  blk_mq_exit_sched+0x12c/0x160\\n[ 2073.019252]  elevator_exit+0xc8/0xd0\\n[ 2073.019256]  blk_exit_queue+0x50/0x88\\n[ 2073.019259]  blk_cleanup_queue+0x228/0x3d8\\n[ 2073.019267]  null_del_dev+0xfc/0x1e0 [null_blk]\\n[ 2073.019274]  null_exit+0x90/0x114 [null_blk]\\n[ 2073.019278]  __arm64_sys_delete_module+0x358/0x5a0\\n[ 2073.019282]  el0_svc_common+0xc8/0x320\\n[ 2073.019287]  el0_svc_handler+0xf8/0x160\\n[ 2073.019290]  el0_svc+0x10/0x218\\n[ 2073.019291]\\n[ 2073.019294] Allocated by task 14163:\\n[ 2073.019301]  kasan_kmalloc+0xe0/0x190\\n[ 2073.019305]  kmem_cache_alloc_node_trace+0x1cc/0x418\\n[ 2073.019308]  bfq_pd_alloc+0x54/0x118\\n[ 2073.019313]  blkcg_activate_policy+0x250/0x460\\n[ 2073.019317]  bfq_create_group_hierarchy+0x38/0x110\\n[ 2073.019321]  bfq_init_queue+0x6d0/0x948\\n[ 2073.019325]  blk_mq_init_sched+0x1d8/0x390\\n[ 2073.019330]  elevator_switch_mq+0x88/0x170\\n[ 2073.019334]  elevator_switch+0x140/0x270\\n[ 2073.019338]  elv_iosched_store+0x1a4/0x2a0\\n[ 2073.019342]  queue_attr_store+0x90/0xe0\\n[ 2073.019348]  sysfs_kf_write+0xa8/0xe8\\n[ 2073.019351]  kernfs_fop_write+0x1f8/0x378\\n[ 2073.019359]  __vfs_write+0xe0/0x360\\n[ 2073.019363]  vfs_write+0xf0/0x270\\n[ 2073.019367]  ksys_write+0xdc/0x1b8\\n[ 2073.019371]  __arm64_sys_write+0x50/0x60\\n[ 2073.019375]  el0_svc_common+0xc8/0x320\\n[ 2073.019380]  el0_svc_handler+0xf8/0x160\\n[ 2073.019383]  el0_svc+0x10/0x218\\n[ 2073.019385]\\n[ 2073.019387] Freed by task 72584:\\n[ 2073.019391]  __kasan_slab_free+0x120/0x228\\n[ 2073.019394]  kasan_slab_free+0x10/0x18\\n[ 2073.019397]  kfree+0x94/0x368\\n[ 2073.019400]  bfqg_put+0x64/0xb0\\n[ 2073.019404]  bfqg_and_blkg_put+0x90/0xb0\\n[ 2073.019408]  bfq_put_queue+0x220/0x228\\n[ 2073.019413]  __bfq_put_async_bfqq+0x98/0x168\\n[ 2073.019416]  bfq_put_async_queues+0xbc/0x208\\n[ 2073.019420]  bfq_pd_offline+0x178/0x238\\n[ 2073.019424]  blkcg_deactivate_policy+0x1f0/0x420\\n[ 2073.019429]  bfq_exit_queue+0x128/0x178\\n[ 2073.019433]  blk_mq_exit_sched+0x12c/0x160\\n[ 2073.019437]  elevator_exit+0xc8/0xd0\\n[ 2073.019440]  blk_exit_queue+0x50/0x88\\n[ 2073.019443]  blk_cleanup_queue+0x228/0x3d8\\n[ 2073.019451]  null_del_dev+0xfc/0x1e0 [null_blk]\\n[ 2073.019459]  null_exit+0x90/0x114 [null_blk]\\n[ 2073.019462]  __arm64_sys_delete_module+0x358/0x5a0\\n[ 2073.019467]  el0_svc_common+0xc8/0x320\\n[ 2073.019471]  el0_svc_handler+0xf8/0x160\\n[ 2073.019474]  el0_svc+0x10/0x218\\n[ 2073.019475]\\n[ 2073.019479] The buggy address belongs to the object at ffff8000ccf63f00\\n which belongs to the cache kmalloc-1024 of size 1024\\n[ 2073.019484] The buggy address is located 552 bytes inside of\\n 1024-byte region [ffff8000ccf63f00, ffff8000ccf64300)\\n[ 2073.019486] The buggy address belongs to the page:\\n[ 2073.019492] page:ffff7e000333d800 count:1 mapcount:0 mapping:ffff8000c0003a00 index:0x0 compound_mapcount: 0\\n[ 2073.020123] flags: 0x7ffff0000008100(slab|head)\\n[ 2073.020403] raw: 07ffff0000008100 ffff7e0003334c08 ffff7e00001f5a08 ffff8000c0003a00\\n[ 2073.020409] ra\\n---truncated---\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: block, bfq: don\u0027t move oom_bfqq Nuestro informe de prueba es un UAF: [ 2073.019181] ======================================================================= [ 2073.019188] ERROR: KASAN: use-after-free en __bfq_put_async_bfqq+0xa0/0x168 [ 2073.019191] Escritura de tama\u00f1o 8 en la direcci\u00f3n ffff8000ccf64128 por la tarea rmmod/72584 [ 2073.019192] [ 2073.019196] CPU: 0 PID: 72584 Comm: rmmod Kdump: cargado No contaminado 4.19.90-yk #5 [ 2073.019198] Nombre del hardware: QEMU KVM Virtual Machine, BIOS 0.0.0 02/06/2015 [ 2073.019200] Rastreo de llamadas: [ 2073.019203] dump_backtrace+0x0/0x310 [ 2073.019206] show_stack+0x28/0x38 [ 2073.019210] dump_stack+0xec/0x15c [ 2073.019216] print_address_description+0x68/0x2d0 [ 2073.019220] kasan_report+0x238/0x2f0 [ 2073.019224] __asan_store8+0x88/0xb0 [ 2073.019229] __bfq_put_async_bfqq+0xa0/0x168 [ 2073.019233] bfq_put_async_queues+0xbc/0x208 [ 2073.019236] bfq_pd_offline+0x178/0x238 [ 2073.019240] blkcg_deactivate_policy+0x1f0/0x420 [ 2073.019244] bfq_exit_queue+0x128/0x178 [ 2073.019249] blk_mq_exit_sched+0x12c/0x160 [ 2073.019252] elevator_exit+0xc8/0xd0 [ 2073.019256] blk_exit_queue+0x50/0x88 [ 2073.019259] blk_cleanup_queue+0x228/0x3d8 [ 2073.019267] null_del_dev+0xfc/0x1e0 [null_blk] [ 2073.019274] null_exit+0x90/0x114 [null_blk] [ 2073.019278] __arm64_sys_delete_module+0x358/0x5a0 [ 2073.019282] el0_svc_common+0xc8/0x320 [ 2073.019287] el0_svc_handler+0xf8/0x160 [ 2073.019290] el0_svc+0x10/0x218 [ 2073.019291] [ 2073.019294] Asignado por la tarea 14163: [ 2073.019301] kasan_kmalloc+0xe0/0x190 [ 2073.019305] kmem_cache_alloc_node_trace+0x1cc/0x418 [ 2073.019308] bfq_pd_alloc+0x54/0x118 [ 2073.019313] blkcg_activate_policy+0x250/0x460 [ 2073.019317] bfq_create_group_hierarchy+0x38/0x110 [ 2073.019321] bfq_init_queue+0x6d0/0x948 [ 2073.019325] blk_mq_init_sched+0x1d8/0x390 [ 2073.019330] elevator_switch_mq+0x88/0x170 [ 2073.019334] elevator_switch+0x140/0x270 [ 2073.019338] elv_iosched_store+0x1a4/0x2a0 [ 2073.019342] queue_attr_store+0x90/0xe0 [ 2073.019348] sysfs_kf_write+0xa8/0xe8 [ 2073.019351] kernfs_fop_write+0x1f8/0x378 [ 2073.019359] __vfs_write+0xe0/0x360 [ 2073.019363] vfs_write+0xf0/0x270 [ 2073.019367] ksys_write+0xdc/0x1b8 [ 2073.019371] __arm64_sys_write+0x50/0x60 [ 2073.019375] el0_svc_common+0xc8/0x320 [ 2073.019380] el0_svc_handler+0xf8/0x160 [ 2073.019383] el0_svc+0x10/0x218 [ 2073.019385] [ 2073.019387] Liberado por la tarea 72584: [ 2073.019391] __kasan_slab_free+0x120/0x228 [ 2073.019394] kasan_slab_free+0x10/0x18 [ 2073.019397] kfree+0x94/0x368 [ 2073.019400] bfqg_put+0x64/0xb0 [ 2073.019404] bfqg_and_blkg_put+0x90/0xb0 [ 2073.019408] bfq_put_queue+0x220/0x228 [ 2073.019413] __bfq_put_async_bfqq+0x98/0x168 [ 2073.019416] bfq_put_async_queues+0xbc/0x208 [ 2073.019420] bfq_pd_offline+0x178/0x238 [ 2073.019424] blkcg_deactivate_policy+0x1f0/0x420 [ 2073.019429] bfq_exit_queue+0x128/0x178 [ 2073.019433] blk_mq_exit_sched+0x12c/0x160 [ 2073.019437] elevator_exit+0xc8/0xd0 [ 2073.019440] blk_exit_queue+0x50/0x88 [ 2073.019443] blk_cleanup_queue+0x228/0x3d8 [ 2073.019451] null_del_dev+0xfc/0x1e0 [null_blk] [ 2073.019459] null_exit+0x90/0x114 [null_blk] [ 2073.019462] __arm64_sys_delete_module+0x358/0x5a0 [ 2073.019467] el0_svc_common+0xc8/0x320 [ 2073.019471] el0_svc_handler+0xf8/0x160 [ 2073.019474] el0_svc+0x10/0x218 [ 2073.019475] [ 2073.019479]  La direcci\u00f3n con errores pertenece al objeto en ffff8000ccf63f00 que pertenece al cach\u00e9 kmalloc-1024 de tama\u00f1o 1024 [ 2073.019484] La direcci\u00f3n con errores se encuentra 552 bytes dentro de la regi\u00f3n de 1024 bytes [ffff8000ccf63f00, ffff8000ccf64300) [ 2073.019486] La direcci\u00f3n con errores pertenece a la p\u00e1gina: [ 2073.019492] page:ffff7e000333d800 count:1 mapcount:0 mapping:ffff8000c0003a00 index:0x0 Compound_mapcount: 0 [ 2073.020123] flags: 0x7ffff0000008100(slab|head) [ 2073.020403] raw: 07ffff0000008100 ffff7e0003334c08 ffff7e00001f5a08 ffff8000c0003a00 [ 2073.020409] ra ---truncado---\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"block/bfq-cgroup.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"0d52af590552473666da5b6111e7182d6cd23f92\",\"lessThan\":\"c4f5a678add58a8a0e7ee5e038496b376ea6d205\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"0d52af590552473666da5b6111e7182d6cd23f92\",\"lessThan\":\"7507ead1e9d42957c2340f2c4a0e9d00034e3366\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"0d52af590552473666da5b6111e7182d6cd23f92\",\"lessThan\":\"8f34dea99cd7761156a146a5258a67d045d862f7\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"0d52af590552473666da5b6111e7182d6cd23f92\",\"lessThan\":\"87fdfe8589d43e471dffb4c60f75eeb6f37afc4c\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"0d52af590552473666da5b6111e7182d6cd23f92\",\"lessThan\":\"c01fced8d38fbccc82787065229578006f28e020\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"0d52af590552473666da5b6111e7182d6cd23f92\",\"lessThan\":\"8410f70977734f21b8ed45c37e925d311dfda2e7\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"block/bfq-cgroup.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"4.16\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"4.16\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.4.189\",\"lessThanOrEqual\":\"5.4.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.110\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.33\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.16.19\",\"lessThanOrEqual\":\"5.16.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.17.2\",\"lessThanOrEqual\":\"5.17.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.18\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":7.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9},{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":7.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2025-02-27T17:59:03.662860Z\",\"id\":\"CVE-2022-49179\",\"options\":[{\"exploitation\":\"none\"},{\"automatable\":\"no\"},{\"technicalImpact\":\"total\"}],\"role\":\"CISA Coordinator\",\"version\":\"2.0.3\"}}]},\"weaknesses\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-416\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"5.4.189\",\"matchCriteriaId\":\"4AAE7A78-57E5-45A6-860D-7867DA88A45E\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.5\",\"versionEndExcluding\":\"5.10.110\",\"matchCriteriaId\":\"91D3BFD0-D3F3-4018-957C-96CCBF357D79\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.11\",\"versionEndExcluding\":\"5.15.33\",\"matchCriteriaId\":\"27C42AE8-B387-43E2-938A-E1C8B40BE6D5\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.16\",\"versionEndExcluding\":\"5.16.19\",\"matchCriteriaId\":\"20C43679-0439-405A-B97F-685BEE50613B\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.17\",\"versionEndExcluding\":\"5.17.2\",\"matchCriteriaId\":\"210C679C-CF84-44A3-8939-E629C87E54BF\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/7507ead1e9d42957c2340f2c4a0e9d00034e3366\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/8410f70977734f21b8ed45c37e925d311dfda2e7\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/87fdfe8589d43e471dffb4c60f75eeb6f37afc4c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/8f34dea99cd7761156a146a5258a67d045d862f7\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/c01fced8d38fbccc82787065229578006f28e020\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/c4f5a678add58a8a0e7ee5e038496b376ea6d205\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-06-29T21:00:32+00:00",
      "cve": "CVE-2022-49179",
      "id": "CVE-2022-49179",
      "initial_release_date": "2022-01-01T00:00:00+00:00",
      "product_status:fixed": "166",
      "product_status:known_affected": "70",
      "product_status:known_not_affected": "118",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: block, bfq: don\u0027t move oom_bfqq",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2022/cve-2022-49179.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-02T12:44:28Z",
      "cve": "CVE-2022-49179",
      "id": "CVE-2022-49179",
      "initial_release_date": "2025-02-27T03:11:03Z",
      "product_status:known_affected": "377",
      "product_status:known_not_affected": "331",
      "product_status:recommended": "283",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2022-49179",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2022-49179.json",
      "version": "65"
    },
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 7.8, \"attackVector\": \"LOCAL\", \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\", \"integrityImpact\": \"HIGH\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"LOW\", \"confidentialityImpact\": \"HIGH\"}}, {\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2022-49179\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"total\"}], \"version\": \"2.0.3\", \"timestamp\": \"2025-02-27T17:59:03.662860Z\"}}}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-416\", \"description\": \"CWE-416 Use After Free\"}]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2025-02-27T17:59:04.947Z\"}}], \"cna\": {\"title\": \"block, bfq: don\u0027t move oom_bfqq\", \"metrics\": [{\"cvssV3_1\": {\"version\": \"3.1\", \"baseScore\": 7.8, \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\"}, \"scenarios\": [{\"lang\": \"en\", \"value\": \"AV:L - The vulnerable BFQ cgroup path is reached through local block I/O (read/write syscalls) and blkcg association changes on a BFQ-managed queue, not via network packet processing.\\nAC:L - An attacker can induce the oom_bfqq fallback via memory pressure they control, then trigger bfq_bfqq_move through cgroup-associated I/O; BFQ with group scheduling is a common real-world configuration, not a rare dependency.\\nPR:L - An unprivileged local user can submit I/O on BFQ devices and cause bios/tasks to span blkcgs (app cgroups, writeback, delegated/user scopes); CAP_SYS_ADMIN is not required to reach the buggy move path.\\nUI:N - The attacker performs the I/O and cgroup-related actions themselves; no separate victim interaction is required.\\nS:U - This is a kernel memory-corruption bug within the host kernel\u0027s authority and does not cross a VM, IOMMU, or other security boundary.\\nC:H - The bug is a use-after-free with a confirmed write to a freed bfq_group; UAF control of freed object contents enables arbitrary kernel memory disclosure.\\nI:H - The KASAN report shows an 8-byte write to freed memory in __bfq_put_async_bfqq during group teardown, which is exploitable for heap corruption and control-flow hijacking.\\nA:H - The use-after-free causes kernel oops/panic during elevator/device teardown and can crash the system even without a full exploit.\"}]}], \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"0d52af590552473666da5b6111e7182d6cd23f92\", \"lessThan\": \"c4f5a678add58a8a0e7ee5e038496b376ea6d205\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"0d52af590552473666da5b6111e7182d6cd23f92\", \"lessThan\": \"7507ead1e9d42957c2340f2c4a0e9d00034e3366\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"0d52af590552473666da5b6111e7182d6cd23f92\", \"lessThan\": \"8f34dea99cd7761156a146a5258a67d045d862f7\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"0d52af590552473666da5b6111e7182d6cd23f92\", \"lessThan\": \"87fdfe8589d43e471dffb4c60f75eeb6f37afc4c\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"0d52af590552473666da5b6111e7182d6cd23f92\", \"lessThan\": \"c01fced8d38fbccc82787065229578006f28e020\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"0d52af590552473666da5b6111e7182d6cd23f92\", \"lessThan\": \"8410f70977734f21b8ed45c37e925d311dfda2e7\", \"versionType\": \"git\"}], \"programFiles\": [\"block/bfq-cgroup.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"4.16\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"4.16\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"5.4.189\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.4.*\"}, {\"status\": \"unaffected\", \"version\": \"5.10.110\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15.33\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"5.16.19\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.16.*\"}, {\"status\": \"unaffected\", \"version\": \"5.17.2\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.17.*\"}, {\"status\": \"unaffected\", \"version\": \"5.18\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"block/bfq-cgroup.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/c4f5a678add58a8a0e7ee5e038496b376ea6d205\"}, {\"url\": \"https://git.kernel.org/stable/c/7507ead1e9d42957c2340f2c4a0e9d00034e3366\"}, {\"url\": \"https://git.kernel.org/stable/c/8f34dea99cd7761156a146a5258a67d045d862f7\"}, {\"url\": \"https://git.kernel.org/stable/c/87fdfe8589d43e471dffb4c60f75eeb6f37afc4c\"}, {\"url\": \"https://git.kernel.org/stable/c/c01fced8d38fbccc82787065229578006f28e020\"}, {\"url\": \"https://git.kernel.org/stable/c/8410f70977734f21b8ed45c37e925d311dfda2e7\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nblock, bfq: don\u0027t move oom_bfqq\\n\\nOur test report a UAF:\\n\\n[ 2073.019181] ==================================================================\\n[ 2073.019188] BUG: KASAN: use-after-free in __bfq_put_async_bfqq+0xa0/0x168\\n[ 2073.019191] Write of size 8 at addr ffff8000ccf64128 by task rmmod/72584\\n[ 2073.019192]\\n[ 2073.019196] CPU: 0 PID: 72584 Comm: rmmod Kdump: loaded Not tainted 4.19.90-yk #5\\n[ 2073.019198] Hardware name: QEMU KVM Virtual Machine, BIOS 0.0.0 02/06/2015\\n[ 2073.019200] Call trace:\\n[ 2073.019203]  dump_backtrace+0x0/0x310\\n[ 2073.019206]  show_stack+0x28/0x38\\n[ 2073.019210]  dump_stack+0xec/0x15c\\n[ 2073.019216]  print_address_description+0x68/0x2d0\\n[ 2073.019220]  kasan_report+0x238/0x2f0\\n[ 2073.019224]  __asan_store8+0x88/0xb0\\n[ 2073.019229]  __bfq_put_async_bfqq+0xa0/0x168\\n[ 2073.019233]  bfq_put_async_queues+0xbc/0x208\\n[ 2073.019236]  bfq_pd_offline+0x178/0x238\\n[ 2073.019240]  blkcg_deactivate_policy+0x1f0/0x420\\n[ 2073.019244]  bfq_exit_queue+0x128/0x178\\n[ 2073.019249]  blk_mq_exit_sched+0x12c/0x160\\n[ 2073.019252]  elevator_exit+0xc8/0xd0\\n[ 2073.019256]  blk_exit_queue+0x50/0x88\\n[ 2073.019259]  blk_cleanup_queue+0x228/0x3d8\\n[ 2073.019267]  null_del_dev+0xfc/0x1e0 [null_blk]\\n[ 2073.019274]  null_exit+0x90/0x114 [null_blk]\\n[ 2073.019278]  __arm64_sys_delete_module+0x358/0x5a0\\n[ 2073.019282]  el0_svc_common+0xc8/0x320\\n[ 2073.019287]  el0_svc_handler+0xf8/0x160\\n[ 2073.019290]  el0_svc+0x10/0x218\\n[ 2073.019291]\\n[ 2073.019294] Allocated by task 14163:\\n[ 2073.019301]  kasan_kmalloc+0xe0/0x190\\n[ 2073.019305]  kmem_cache_alloc_node_trace+0x1cc/0x418\\n[ 2073.019308]  bfq_pd_alloc+0x54/0x118\\n[ 2073.019313]  blkcg_activate_policy+0x250/0x460\\n[ 2073.019317]  bfq_create_group_hierarchy+0x38/0x110\\n[ 2073.019321]  bfq_init_queue+0x6d0/0x948\\n[ 2073.019325]  blk_mq_init_sched+0x1d8/0x390\\n[ 2073.019330]  elevator_switch_mq+0x88/0x170\\n[ 2073.019334]  elevator_switch+0x140/0x270\\n[ 2073.019338]  elv_iosched_store+0x1a4/0x2a0\\n[ 2073.019342]  queue_attr_store+0x90/0xe0\\n[ 2073.019348]  sysfs_kf_write+0xa8/0xe8\\n[ 2073.019351]  kernfs_fop_write+0x1f8/0x378\\n[ 2073.019359]  __vfs_write+0xe0/0x360\\n[ 2073.019363]  vfs_write+0xf0/0x270\\n[ 2073.019367]  ksys_write+0xdc/0x1b8\\n[ 2073.019371]  __arm64_sys_write+0x50/0x60\\n[ 2073.019375]  el0_svc_common+0xc8/0x320\\n[ 2073.019380]  el0_svc_handler+0xf8/0x160\\n[ 2073.019383]  el0_svc+0x10/0x218\\n[ 2073.019385]\\n[ 2073.019387] Freed by task 72584:\\n[ 2073.019391]  __kasan_slab_free+0x120/0x228\\n[ 2073.019394]  kasan_slab_free+0x10/0x18\\n[ 2073.019397]  kfree+0x94/0x368\\n[ 2073.019400]  bfqg_put+0x64/0xb0\\n[ 2073.019404]  bfqg_and_blkg_put+0x90/0xb0\\n[ 2073.019408]  bfq_put_queue+0x220/0x228\\n[ 2073.019413]  __bfq_put_async_bfqq+0x98/0x168\\n[ 2073.019416]  bfq_put_async_queues+0xbc/0x208\\n[ 2073.019420]  bfq_pd_offline+0x178/0x238\\n[ 2073.019424]  blkcg_deactivate_policy+0x1f0/0x420\\n[ 2073.019429]  bfq_exit_queue+0x128/0x178\\n[ 2073.019433]  blk_mq_exit_sched+0x12c/0x160\\n[ 2073.019437]  elevator_exit+0xc8/0xd0\\n[ 2073.019440]  blk_exit_queue+0x50/0x88\\n[ 2073.019443]  blk_cleanup_queue+0x228/0x3d8\\n[ 2073.019451]  null_del_dev+0xfc/0x1e0 [null_blk]\\n[ 2073.019459]  null_exit+0x90/0x114 [null_blk]\\n[ 2073.019462]  __arm64_sys_delete_module+0x358/0x5a0\\n[ 2073.019467]  el0_svc_common+0xc8/0x320\\n[ 2073.019471]  el0_svc_handler+0xf8/0x160\\n[ 2073.019474]  el0_svc+0x10/0x218\\n[ 2073.019475]\\n[ 2073.019479] The buggy address belongs to the object at ffff8000ccf63f00\\n which belongs to the cache kmalloc-1024 of size 1024\\n[ 2073.019484] The buggy address is located 552 bytes inside of\\n 1024-byte region [ffff8000ccf63f00, ffff8000ccf64300)\\n[ 2073.019486] The buggy address belongs to the page:\\n[ 2073.019492] page:ffff7e000333d800 count:1 mapcount:0 mapping:ffff8000c0003a00 index:0x0 compound_mapcount: 0\\n[ 2073.020123] flags: 0x7ffff0000008100(slab|head)\\n[ 2073.020403] raw: 07ffff0000008100 ffff7e0003334c08 ffff7e00001f5a08 ffff8000c0003a00\\n[ 2073.020409] ra\\n---truncated---\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.4.189\", \"versionStartIncluding\": \"4.16\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.110\", \"versionStartIncluding\": \"4.16\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.33\", \"versionStartIncluding\": \"4.16\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.16.19\", \"versionStartIncluding\": \"4.16\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.17.2\", \"versionStartIncluding\": \"4.16\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.18\", \"versionStartIncluding\": \"4.16\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-08-12T23:58:15.467Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2022-49179\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-08-12T23:58:15.467Z\", \"dateReserved\": \"2025-02-26T01:49:39.281Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2025-02-26T01:55:32.100Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.