GCVE Workshop - 22 September 2026 (14:00-18:00), Luxembourg Before The Vulnopticon Conference - Registration

CVE-2026-80863 (GCVE-0-2026-80863)

Vulnerability from cvelistv5 – Published: 2026-09-04 15:55 – Updated: 2026-09-04 15:55
VLAI
Title
RDMA/rxe: Fix OOB in free_rd_atomic_resources()
Summary
In the Linux kernel, the following vulnerability has been resolved: RDMA/rxe: Fix OOB in free_rd_atomic_resources() free_rd_atomic_resources() iterates using qp->attr.max_dest_rd_atomic. Updating max_dest_rd_atomic before freeing the old array can make the free path walk past the old allocation and trigger a slab out-of-bounds write catched by KASAN: ================================================================== BUG: KASAN: slab-out-of-bounds in free_rd_atomic_resource drivers/infiniband/sw/rxe/rxe_qp.c:180 [inline] BUG: KASAN: slab-out-of-bounds in free_rd_atomic_resources drivers/infiniband/sw/rxe/rxe_qp.c:171 [inline] BUG: KASAN: slab-out-of-bounds in free_rd_atomic_resources drivers/infiniband/sw/rxe/rxe_qp.c:163 [inline] BUG: KASAN: slab-out-of-bounds in rxe_qp_from_attr+0x1e88/0x2150 drivers/infiniband/sw/rxe/rxe_qp.c:712 Write of size 4 at addr ffff88802b8dddb8 by task syz.3.451/11063 CPU: 0 UID: 0 PID: 11063 Comm: syz.3.451 Not tainted 7.1.0 #2 PREEMPT(full) Hardware name: QEMU Ubuntu 24.04 PC v2 (i440FX + PIIX, arch_caps fix, 1996), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 Call Trace: <TASK> __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x10e/0x1f0 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:378 [inline] print_report+0xf7/0x600 mm/kasan/report.c:482 kasan_report+0xe4/0x120 mm/kasan/report.c:595 free_rd_atomic_resource drivers/infiniband/sw/rxe/rxe_qp.c:180 [inline] free_rd_atomic_resources drivers/infiniband/sw/rxe/rxe_qp.c:171 [inline] free_rd_atomic_resources drivers/infiniband/sw/rxe/rxe_qp.c:163 [inline] rxe_qp_from_attr+0x1e88/0x2150 drivers/infiniband/sw/rxe/rxe_qp.c:712 rxe_modify_qp+0x1e2/0x530 drivers/infiniband/sw/rxe/rxe_verbs.c:623 ib_security_modify_qp+0x223/0xfa0 drivers/infiniband/core/security.c:625 _ib_modify_qp+0x333/0xec0 drivers/infiniband/core/verbs.c:1915 modify_qp+0x13ca/0x1940 drivers/infiniband/core/uverbs_cmd.c:1932 ib_uverbs_modify_qp+0xcb/0x120 drivers/infiniband/core/uverbs_cmd.c:1958 ib_uverbs_write+0xb86/0x1030 drivers/infiniband/core/uverbs_main.c:680 vfs_write+0x2aa/0x1070 fs/read_write.c:686 ksys_write+0x1f8/0x250 fs/read_write.c:740 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x116/0x800 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fefc75a70cd Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fefc8495018 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007fefc7835fa0 RCX: 00007fefc75a70cd RDX: 0000000000000078 RSI: 0000200000000240 RDI: 0000000000000007 RBP: 00007fefc764f10f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fefc7836038 R14: 00007fefc7835fa0 R15: 00007ffcf0586aa0 </TASK> Allocated by task 11063: kasan_save_stack+0x33/0x60 mm/kasan/common.c:57 kasan_save_track+0x14/0x30 mm/kasan/common.c:78 poison_kmalloc_redzone mm/kasan/common.c:398 [inline] __kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:415 kasan_kmalloc include/linux/kasan.h:263 [inline] __do_kmalloc_node mm/slub.c:5296 [inline] __kmalloc_noprof+0x32a/0x850 mm/slub.c:5308 kmalloc_noprof include/linux/slab.h:954 [inline] kzalloc_noprof include/linux/slab.h:1188 [inline] alloc_rd_atomic_resources drivers/infiniband/sw/rxe/rxe_qp.c:155 [inline] rxe_qp_from_attr+0x3f8/0x2150 drivers/infiniband/sw/rxe/rxe_qp.c:714 rxe_modify_qp+0x1e2/0x530 drivers/infiniband/sw/rxe/rxe_verbs.c:623 ib_security_modify_qp+0x223/0xfa0 drivers/infiniband/core/security.c:625 _ib_modify_qp+0x333/0xec0 drivers/infiniband/core/verbs.c:1915 modify_qp+0x13ca/0x1940 drivers/infiniband/core/uverbs_cmd.c:1932 ib_uverbs_modify_qp+0xcb/0x120 drivers/infiniband/core/uverbs_cmd.c:1958 ib_uverbs_write+0xb86/0x1030 drivers/infiniband/core/uverbs_ma ---truncated---
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: b6bbee0d2438a2c9c7525f5bd7047a8b2ce4f38f , < 142c8165b7974b40fa62c393653edb5c00b8b5fe (git)
Affected: b6bbee0d2438a2c9c7525f5bd7047a8b2ce4f38f , < 30b90b55201902b2b8edcdbe2315ccd4c7547002 (git)
Affected: b6bbee0d2438a2c9c7525f5bd7047a8b2ce4f38f , < 9b7d66ea88ae9395e42766b94a5c717b158b940a (git)
Affected: b6bbee0d2438a2c9c7525f5bd7047a8b2ce4f38f , < f5e6580a3a16a83c743ad5a7c16922854a0d8b71 (git)
Affected: b6bbee0d2438a2c9c7525f5bd7047a8b2ce4f38f , < bc6e943794515d2a8417b02597a27bd377468d04 (git)
Affected: b6bbee0d2438a2c9c7525f5bd7047a8b2ce4f38f , < bdf5deccfbf9f556a08d1d2ef52e9e48f969e53e (git)
Affected: b6bbee0d2438a2c9c7525f5bd7047a8b2ce4f38f , < 4e5f753e8c280278c09f68fe728abf846e2bdfc1 (git)
Affected: b6bbee0d2438a2c9c7525f5bd7047a8b2ce4f38f , < d219e7a8eed3802970c3e4d243d79c70ef0a31bf (git)
Affected: b6bbee0d2438a2c9c7525f5bd7047a8b2ce4f38f , < de329533792a373186d79dca1ca120f8fa0afd05 (git)
guessed Create a notification for this product.
Linux Linux Affected: 4.9
Unaffected: 0 , < 4.9 (semver)
Unaffected: 5.10.269 , ≤ 5.10.* (semver)
Unaffected: 5.15.220 , ≤ 5.15.* (semver)
Unaffected: 6.1.187 , ≤ 6.1.* (semver)
Unaffected: 6.6.156 , ≤ 6.6.* (semver)
Unaffected: 6.12.108 , ≤ 6.12.* (semver)
Unaffected: 6.18.49 , ≤ 6.18.* (semver)
Unaffected: 7.1.13 , ≤ 7.1.* (semver)
Unaffected: 7.2.3 , ≤ 7.2.* (semver)
Unaffected: 7.3-rc1 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/infiniband/sw/rxe/rxe_qp.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "142c8165b7974b40fa62c393653edb5c00b8b5fe",
              "status": "affected",
              "version": "b6bbee0d2438a2c9c7525f5bd7047a8b2ce4f38f",
              "versionType": "git"
            },
            {
              "lessThan": "30b90b55201902b2b8edcdbe2315ccd4c7547002",
              "status": "affected",
              "version": "b6bbee0d2438a2c9c7525f5bd7047a8b2ce4f38f",
              "versionType": "git"
            },
            {
              "lessThan": "9b7d66ea88ae9395e42766b94a5c717b158b940a",
              "status": "affected",
              "version": "b6bbee0d2438a2c9c7525f5bd7047a8b2ce4f38f",
              "versionType": "git"
            },
            {
              "lessThan": "f5e6580a3a16a83c743ad5a7c16922854a0d8b71",
              "status": "affected",
              "version": "b6bbee0d2438a2c9c7525f5bd7047a8b2ce4f38f",
              "versionType": "git"
            },
            {
              "lessThan": "bc6e943794515d2a8417b02597a27bd377468d04",
              "status": "affected",
              "version": "b6bbee0d2438a2c9c7525f5bd7047a8b2ce4f38f",
              "versionType": "git"
            },
            {
              "lessThan": "bdf5deccfbf9f556a08d1d2ef52e9e48f969e53e",
              "status": "affected",
              "version": "b6bbee0d2438a2c9c7525f5bd7047a8b2ce4f38f",
              "versionType": "git"
            },
            {
              "lessThan": "4e5f753e8c280278c09f68fe728abf846e2bdfc1",
              "status": "affected",
              "version": "b6bbee0d2438a2c9c7525f5bd7047a8b2ce4f38f",
              "versionType": "git"
            },
            {
              "lessThan": "d219e7a8eed3802970c3e4d243d79c70ef0a31bf",
              "status": "affected",
              "version": "b6bbee0d2438a2c9c7525f5bd7047a8b2ce4f38f",
              "versionType": "git"
            },
            {
              "lessThan": "de329533792a373186d79dca1ca120f8fa0afd05",
              "status": "affected",
              "version": "b6bbee0d2438a2c9c7525f5bd7047a8b2ce4f38f",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/infiniband/sw/rxe/rxe_qp.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.9"
            },
            {
              "lessThan": "4.9",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.269",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.220",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.187",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.156",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.108",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.49",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.13",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.3",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.269",
                  "versionStartIncluding": "4.9",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.220",
                  "versionStartIncluding": "4.9",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.187",
                  "versionStartIncluding": "4.9",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.156",
                  "versionStartIncluding": "4.9",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.108",
                  "versionStartIncluding": "4.9",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.49",
                  "versionStartIncluding": "4.9",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1.13",
                  "versionStartIncluding": "4.9",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2.3",
                  "versionStartIncluding": "4.9",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3-rc1",
                  "versionStartIncluding": "4.9",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/rxe: Fix OOB in free_rd_atomic_resources()\n\nfree_rd_atomic_resources() iterates using qp-\u003eattr.max_dest_rd_atomic.\nUpdating max_dest_rd_atomic before freeing the old array can make the\nfree path walk past the old allocation and trigger a slab out-of-bounds\nwrite catched by KASAN:\n==================================================================\nBUG: KASAN: slab-out-of-bounds in free_rd_atomic_resource drivers/infiniband/sw/rxe/rxe_qp.c:180 [inline]\nBUG: KASAN: slab-out-of-bounds in free_rd_atomic_resources drivers/infiniband/sw/rxe/rxe_qp.c:171 [inline]\nBUG: KASAN: slab-out-of-bounds in free_rd_atomic_resources drivers/infiniband/sw/rxe/rxe_qp.c:163 [inline]\nBUG: KASAN: slab-out-of-bounds in rxe_qp_from_attr+0x1e88/0x2150 drivers/infiniband/sw/rxe/rxe_qp.c:712\nWrite of size 4 at addr ffff88802b8dddb8 by task syz.3.451/11063\n\nCPU: 0 UID: 0 PID: 11063 Comm: syz.3.451 Not tainted 7.1.0 #2 PREEMPT(full)\nHardware name: QEMU Ubuntu 24.04 PC v2 (i440FX + PIIX, arch_caps fix, 1996), BIOS 1.16.3-debian-1.16.3-2 04/01/2014\nCall Trace:\n \u003cTASK\u003e\n __dump_stack lib/dump_stack.c:94 [inline]\n dump_stack_lvl+0x10e/0x1f0 lib/dump_stack.c:120\n print_address_description mm/kasan/report.c:378 [inline]\n print_report+0xf7/0x600 mm/kasan/report.c:482\n kasan_report+0xe4/0x120 mm/kasan/report.c:595\n free_rd_atomic_resource drivers/infiniband/sw/rxe/rxe_qp.c:180 [inline]\n free_rd_atomic_resources drivers/infiniband/sw/rxe/rxe_qp.c:171 [inline]\n free_rd_atomic_resources drivers/infiniband/sw/rxe/rxe_qp.c:163 [inline]\n rxe_qp_from_attr+0x1e88/0x2150 drivers/infiniband/sw/rxe/rxe_qp.c:712\n rxe_modify_qp+0x1e2/0x530 drivers/infiniband/sw/rxe/rxe_verbs.c:623\n ib_security_modify_qp+0x223/0xfa0 drivers/infiniband/core/security.c:625\n _ib_modify_qp+0x333/0xec0 drivers/infiniband/core/verbs.c:1915\n modify_qp+0x13ca/0x1940 drivers/infiniband/core/uverbs_cmd.c:1932\n ib_uverbs_modify_qp+0xcb/0x120 drivers/infiniband/core/uverbs_cmd.c:1958\n ib_uverbs_write+0xb86/0x1030 drivers/infiniband/core/uverbs_main.c:680\n vfs_write+0x2aa/0x1070 fs/read_write.c:686\n ksys_write+0x1f8/0x250 fs/read_write.c:740\n do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]\n do_syscall_64+0x116/0x800 arch/x86/entry/syscall_64.c:94\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\nRIP: 0033:0x7fefc75a70cd\nCode: ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 \u003c48\u003e 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48\nRSP: 002b:00007fefc8495018 EFLAGS: 00000246 ORIG_RAX: 0000000000000001\nRAX: ffffffffffffffda RBX: 00007fefc7835fa0 RCX: 00007fefc75a70cd\nRDX: 0000000000000078 RSI: 0000200000000240 RDI: 0000000000000007\nRBP: 00007fefc764f10f R08: 0000000000000000 R09: 0000000000000000\nR10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000\nR13: 00007fefc7836038 R14: 00007fefc7835fa0 R15: 00007ffcf0586aa0\n \u003c/TASK\u003e\n\nAllocated by task 11063:\n kasan_save_stack+0x33/0x60 mm/kasan/common.c:57\n kasan_save_track+0x14/0x30 mm/kasan/common.c:78\n poison_kmalloc_redzone mm/kasan/common.c:398 [inline]\n __kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:415\n kasan_kmalloc include/linux/kasan.h:263 [inline]\n __do_kmalloc_node mm/slub.c:5296 [inline]\n __kmalloc_noprof+0x32a/0x850 mm/slub.c:5308\n kmalloc_noprof include/linux/slab.h:954 [inline]\n kzalloc_noprof include/linux/slab.h:1188 [inline]\n alloc_rd_atomic_resources drivers/infiniband/sw/rxe/rxe_qp.c:155 [inline]\n rxe_qp_from_attr+0x3f8/0x2150 drivers/infiniband/sw/rxe/rxe_qp.c:714\n rxe_modify_qp+0x1e2/0x530 drivers/infiniband/sw/rxe/rxe_verbs.c:623\n ib_security_modify_qp+0x223/0xfa0 drivers/infiniband/core/security.c:625\n _ib_modify_qp+0x333/0xec0 drivers/infiniband/core/verbs.c:1915\n modify_qp+0x13ca/0x1940 drivers/infiniband/core/uverbs_cmd.c:1932\n ib_uverbs_modify_qp+0xcb/0x120 drivers/infiniband/core/uverbs_cmd.c:1958\n ib_uverbs_write+0xb86/0x1030 drivers/infiniband/core/uverbs_ma\n---truncated---"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-04T15:55:17.668Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/142c8165b7974b40fa62c393653edb5c00b8b5fe"
        },
        {
          "url": "https://git.kernel.org/stable/c/30b90b55201902b2b8edcdbe2315ccd4c7547002"
        },
        {
          "url": "https://git.kernel.org/stable/c/9b7d66ea88ae9395e42766b94a5c717b158b940a"
        },
        {
          "url": "https://git.kernel.org/stable/c/f5e6580a3a16a83c743ad5a7c16922854a0d8b71"
        },
        {
          "url": "https://git.kernel.org/stable/c/bc6e943794515d2a8417b02597a27bd377468d04"
        },
        {
          "url": "https://git.kernel.org/stable/c/bdf5deccfbf9f556a08d1d2ef52e9e48f969e53e"
        },
        {
          "url": "https://git.kernel.org/stable/c/4e5f753e8c280278c09f68fe728abf846e2bdfc1"
        },
        {
          "url": "https://git.kernel.org/stable/c/d219e7a8eed3802970c3e4d243d79c70ef0a31bf"
        },
        {
          "url": "https://git.kernel.org/stable/c/de329533792a373186d79dca1ca120f8fa0afd05"
        }
      ],
      "title": "RDMA/rxe: Fix OOB in free_rd_atomic_resources()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-80863",
    "datePublished": "2026-09-04T15:55:17.668Z",
    "dateReserved": "2026-08-26T14:34:25.798Z",
    "dateUpdated": "2026-09-04T15:55:17.668Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-80863",
      "date": "2026-09-14",
      "epss": "0.00182",
      "percentile": "0.07916"
    },
    "microsoft_vex": {
      "current_release_date": "2026-09-07T01:54:41.000Z",
      "cve": "CVE-2026-80863",
      "id": "msrc_CVE-2026-80863",
      "initial_release_date": "2026-09-07T01:54:41.000Z",
      "product_status:known_affected": "1",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "RDMA/rxe: Fix OOB in free_rd_atomic_resources()",
      "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-80863.json",
      "version": "1"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-80863\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-09-04T16:18:15.560\",\"lastModified\":\"2026-09-04T16:18:15.560\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nRDMA/rxe: Fix OOB in free_rd_atomic_resources()\\n\\nfree_rd_atomic_resources() iterates using qp-\u003eattr.max_dest_rd_atomic.\\nUpdating max_dest_rd_atomic before freeing the old array can make the\\nfree path walk past the old allocation and trigger a slab out-of-bounds\\nwrite catched by KASAN:\\n==================================================================\\nBUG: KASAN: slab-out-of-bounds in free_rd_atomic_resource drivers/infiniband/sw/rxe/rxe_qp.c:180 [inline]\\nBUG: KASAN: slab-out-of-bounds in free_rd_atomic_resources drivers/infiniband/sw/rxe/rxe_qp.c:171 [inline]\\nBUG: KASAN: slab-out-of-bounds in free_rd_atomic_resources drivers/infiniband/sw/rxe/rxe_qp.c:163 [inline]\\nBUG: KASAN: slab-out-of-bounds in rxe_qp_from_attr+0x1e88/0x2150 drivers/infiniband/sw/rxe/rxe_qp.c:712\\nWrite of size 4 at addr ffff88802b8dddb8 by task syz.3.451/11063\\n\\nCPU: 0 UID: 0 PID: 11063 Comm: syz.3.451 Not tainted 7.1.0 #2 PREEMPT(full)\\nHardware name: QEMU Ubuntu 24.04 PC v2 (i440FX + PIIX, arch_caps fix, 1996), BIOS 1.16.3-debian-1.16.3-2 04/01/2014\\nCall Trace:\\n \u003cTASK\u003e\\n __dump_stack lib/dump_stack.c:94 [inline]\\n dump_stack_lvl+0x10e/0x1f0 lib/dump_stack.c:120\\n print_address_description mm/kasan/report.c:378 [inline]\\n print_report+0xf7/0x600 mm/kasan/report.c:482\\n kasan_report+0xe4/0x120 mm/kasan/report.c:595\\n free_rd_atomic_resource drivers/infiniband/sw/rxe/rxe_qp.c:180 [inline]\\n free_rd_atomic_resources drivers/infiniband/sw/rxe/rxe_qp.c:171 [inline]\\n free_rd_atomic_resources drivers/infiniband/sw/rxe/rxe_qp.c:163 [inline]\\n rxe_qp_from_attr+0x1e88/0x2150 drivers/infiniband/sw/rxe/rxe_qp.c:712\\n rxe_modify_qp+0x1e2/0x530 drivers/infiniband/sw/rxe/rxe_verbs.c:623\\n ib_security_modify_qp+0x223/0xfa0 drivers/infiniband/core/security.c:625\\n _ib_modify_qp+0x333/0xec0 drivers/infiniband/core/verbs.c:1915\\n modify_qp+0x13ca/0x1940 drivers/infiniband/core/uverbs_cmd.c:1932\\n ib_uverbs_modify_qp+0xcb/0x120 drivers/infiniband/core/uverbs_cmd.c:1958\\n ib_uverbs_write+0xb86/0x1030 drivers/infiniband/core/uverbs_main.c:680\\n vfs_write+0x2aa/0x1070 fs/read_write.c:686\\n ksys_write+0x1f8/0x250 fs/read_write.c:740\\n do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]\\n do_syscall_64+0x116/0x800 arch/x86/entry/syscall_64.c:94\\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\\nRIP: 0033:0x7fefc75a70cd\\nCode: ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 \u003c48\u003e 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48\\nRSP: 002b:00007fefc8495018 EFLAGS: 00000246 ORIG_RAX: 0000000000000001\\nRAX: ffffffffffffffda RBX: 00007fefc7835fa0 RCX: 00007fefc75a70cd\\nRDX: 0000000000000078 RSI: 0000200000000240 RDI: 0000000000000007\\nRBP: 00007fefc764f10f R08: 0000000000000000 R09: 0000000000000000\\nR10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000\\nR13: 00007fefc7836038 R14: 00007fefc7835fa0 R15: 00007ffcf0586aa0\\n \u003c/TASK\u003e\\n\\nAllocated by task 11063:\\n kasan_save_stack+0x33/0x60 mm/kasan/common.c:57\\n kasan_save_track+0x14/0x30 mm/kasan/common.c:78\\n poison_kmalloc_redzone mm/kasan/common.c:398 [inline]\\n __kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:415\\n kasan_kmalloc include/linux/kasan.h:263 [inline]\\n __do_kmalloc_node mm/slub.c:5296 [inline]\\n __kmalloc_noprof+0x32a/0x850 mm/slub.c:5308\\n kmalloc_noprof include/linux/slab.h:954 [inline]\\n kzalloc_noprof include/linux/slab.h:1188 [inline]\\n alloc_rd_atomic_resources drivers/infiniband/sw/rxe/rxe_qp.c:155 [inline]\\n rxe_qp_from_attr+0x3f8/0x2150 drivers/infiniband/sw/rxe/rxe_qp.c:714\\n rxe_modify_qp+0x1e2/0x530 drivers/infiniband/sw/rxe/rxe_verbs.c:623\\n ib_security_modify_qp+0x223/0xfa0 drivers/infiniband/core/security.c:625\\n _ib_modify_qp+0x333/0xec0 drivers/infiniband/core/verbs.c:1915\\n modify_qp+0x13ca/0x1940 drivers/infiniband/core/uverbs_cmd.c:1932\\n ib_uverbs_modify_qp+0xcb/0x120 drivers/infiniband/core/uverbs_cmd.c:1958\\n ib_uverbs_write+0xb86/0x1030 drivers/infiniband/core/uverbs_ma\\n---truncated---\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/infiniband/sw/rxe/rxe_qp.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"b6bbee0d2438a2c9c7525f5bd7047a8b2ce4f38f\",\"lessThan\":\"142c8165b7974b40fa62c393653edb5c00b8b5fe\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"b6bbee0d2438a2c9c7525f5bd7047a8b2ce4f38f\",\"lessThan\":\"30b90b55201902b2b8edcdbe2315ccd4c7547002\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"b6bbee0d2438a2c9c7525f5bd7047a8b2ce4f38f\",\"lessThan\":\"9b7d66ea88ae9395e42766b94a5c717b158b940a\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"b6bbee0d2438a2c9c7525f5bd7047a8b2ce4f38f\",\"lessThan\":\"f5e6580a3a16a83c743ad5a7c16922854a0d8b71\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"b6bbee0d2438a2c9c7525f5bd7047a8b2ce4f38f\",\"lessThan\":\"bc6e943794515d2a8417b02597a27bd377468d04\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"b6bbee0d2438a2c9c7525f5bd7047a8b2ce4f38f\",\"lessThan\":\"bdf5deccfbf9f556a08d1d2ef52e9e48f969e53e\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"b6bbee0d2438a2c9c7525f5bd7047a8b2ce4f38f\",\"lessThan\":\"4e5f753e8c280278c09f68fe728abf846e2bdfc1\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"b6bbee0d2438a2c9c7525f5bd7047a8b2ce4f38f\",\"lessThan\":\"d219e7a8eed3802970c3e4d243d79c70ef0a31bf\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"b6bbee0d2438a2c9c7525f5bd7047a8b2ce4f38f\",\"lessThan\":\"de329533792a373186d79dca1ca120f8fa0afd05\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/infiniband/sw/rxe/rxe_qp.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"4.9\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"4.9\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.269\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.220\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.187\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.156\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.108\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.49\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1.13\",\"lessThanOrEqual\":\"7.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2.3\",\"lessThanOrEqual\":\"7.2.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.3-rc1\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/142c8165b7974b40fa62c393653edb5c00b8b5fe\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/30b90b55201902b2b8edcdbe2315ccd4c7547002\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/4e5f753e8c280278c09f68fe728abf846e2bdfc1\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/9b7d66ea88ae9395e42766b94a5c717b158b940a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/bc6e943794515d2a8417b02597a27bd377468d04\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/bdf5deccfbf9f556a08d1d2ef52e9e48f969e53e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/d219e7a8eed3802970c3e4d243d79c70ef0a31bf\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/de329533792a373186d79dca1ca120f8fa0afd05\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/f5e6580a3a16a83c743ad5a7c16922854a0d8b71\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-09-08T21:12:23+00:00",
      "cve": "CVE-2026-80863",
      "id": "CVE-2026-80863",
      "initial_release_date": "2026-09-04T00:00:00+00:00",
      "product_status:known_affected": "169",
      "product_status:known_not_affected": "107",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: RDMA/rxe: Fix OOB in free_rd_atomic_resources()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80863.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-10T01:50:22Z",
      "cve": "CVE-2026-80863",
      "id": "CVE-2026-80863",
      "initial_release_date": "2026-09-07T16:19:33Z",
      "product_status:known_affected": "337",
      "product_status:known_not_affected": "4",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-80863",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-80863.json",
      "version": "3"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





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

Author Source Type Date Other

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.