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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\niavf: Fix reset error handling\n\nDo not call iavf_close in iavf_reset_task error handling. Doing so can\nlead to double call of napi_disable, which can lead to deadlock there.\nRemoving VF would lead to iavf_remove task being stuck, because it\nrequires crit_lock, which is held by iavf_close.\nCall iavf_disable_vf if reset fail, so that driver will clean up\nremaining invalid resources.\nDuring rapid VF resets, HW can fail to setup VF mailbox. Wrong\nerror handling can lead to iavf_remove being stuck with:\n[ 5218.999087] iavf 0000:82:01.0: Failed to init adminq: -53\n...\n[ 5267.189211] INFO: task repro.sh:11219 blocked for more than 30 seconds.\n[ 5267.189520]       Tainted: G S          E     5.18.0-04958-ga54ce3703613-dirty #1\n[ 5267.189764] \"echo 0 \u003e /proc/sys/kernel/hung_task_timeout_secs\" disables this message.\n[ 5267.190062] task:repro.sh        state:D stack:    0 pid:11219 ppid:  8162 flags:0x00000000\n[ 5267.190347] Call Trace:\n[ 5267.190647]  \u003cTASK\u003e\n[ 5267.190927]  __schedule+0x460/0x9f0\n[ 5267.191264]  schedule+0x44/0xb0\n[ 5267.191563]  schedule_preempt_disabled+0x14/0x20\n[ 5267.191890]  __mutex_lock.isra.12+0x6e3/0xac0\n[ 5267.192237]  ? iavf_remove+0xf9/0x6c0 [iavf]\n[ 5267.192565]  iavf_remove+0x12a/0x6c0 [iavf]\n[ 5267.192911]  ? _raw_spin_unlock_irqrestore+0x1e/0x40\n[ 5267.193285]  pci_device_remove+0x36/0xb0\n[ 5267.193619]  device_release_driver_internal+0xc1/0x150\n[ 5267.193974]  pci_stop_bus_device+0x69/0x90\n[ 5267.194361]  pci_stop_and_remove_bus_device+0xe/0x20\n[ 5267.194735]  pci_iov_remove_virtfn+0xba/0x120\n[ 5267.195130]  sriov_disable+0x2f/0xe0\n[ 5267.195506]  ice_free_vfs+0x7d/0x2f0 [ice]\n[ 5267.196056]  ? pci_get_device+0x4f/0x70\n[ 5267.196496]  ice_sriov_configure+0x78/0x1a0 [ice]\n[ 5267.196995]  sriov_numvfs_store+0xfe/0x140\n[ 5267.197466]  kernfs_fop_write_iter+0x12e/0x1c0\n[ 5267.197918]  new_sync_write+0x10c/0x190\n[ 5267.198404]  vfs_write+0x24e/0x2d0\n[ 5267.198886]  ksys_write+0x5c/0xd0\n[ 5267.199367]  do_syscall_64+0x3a/0x80\n[ 5267.199827]  entry_SYSCALL_64_after_hwframe+0x46/0xb0\n[ 5267.200317] RIP: 0033:0x7f5b381205c8\n[ 5267.200814] RSP: 002b:00007fff8c7e8c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001\n[ 5267.201981] RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f5b381205c8\n[ 5267.202620] RDX: 0000000000000002 RSI: 00005569420ee900 RDI: 0000000000000001\n[ 5267.203426] RBP: 00005569420ee900 R08: 000000000000000a R09: 00007f5b38180820\n[ 5267.204327] R10: 000000000000000a R11: 0000000000000246 R12: 00007f5b383c06e0\n[ 5267.205193] R13: 0000000000000002 R14: 00007f5b383bb880 R15: 0000000000000002\n[ 5267.206041]  \u003c/TASK\u003e\n[ 5267.206970] Kernel panic - not syncing: hung_task: blocked tasks\n[ 5267.207809] CPU: 48 PID: 551 Comm: khungtaskd Kdump: loaded Tainted: G S          E     5.18.0-04958-ga54ce3703613-dirty #1\n[ 5267.208726] Hardware name: Dell Inc. PowerEdge R730/0WCJNT, BIOS 2.11.0 11/02/2019\n[ 5267.209623] Call Trace:\n[ 5267.210569]  \u003cTASK\u003e\n[ 5267.211480]  dump_stack_lvl+0x33/0x42\n[ 5267.212472]  panic+0x107/0x294\n[ 5267.213467]  watchdog.cold.8+0xc/0xbb\n[ 5267.214413]  ? proc_dohung_task_timeout_secs+0x30/0x30\n[ 5267.215511]  kthread+0xf4/0x120\n[ 5267.216459]  ? kthread_complete_and_exit+0x20/0x20\n[ 5267.217505]  ret_from_fork+0x22/0x30\n[ 5267.218459]  \u003c/TASK\u003e"
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nblk-rq-qos: fix crash on rq_qos_wait vs. rq_qos_wake_function race\n\nWe\u0027re seeing crashes from rq_qos_wake_function that look like this:\n\n  BUG: unable to handle page fault for address: ffffafe180a40084\n  #PF: supervisor write access in kernel mode\n  #PF: error_code(0x0002) - not-present page\n  PGD 100000067 P4D 100000067 PUD 10027c067 PMD 10115d067 PTE 0\n  Oops: Oops: 0002 [#1] PREEMPT SMP PTI\n  CPU: 17 UID: 0 PID: 0 Comm: swapper/17 Not tainted 6.12.0-rc3-00013-geca631b8fe80 #11\n  Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.0-0-gd239552ce722-prebuilt.qemu.org 04/01/2014\n  RIP: 0010:_raw_spin_lock_irqsave+0x1d/0x40\n  Code: 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 0f 1f 44 00 00 41 54 9c 41 5c fa 65 ff 05 62 97 30 4c 31 c0 ba 01 00 00 00 \u003cf0\u003e 0f b1 17 75 0a 4c 89 e0 41 5c c3 cc cc cc cc 89 c6 e8 2c 0b 00\n  RSP: 0018:ffffafe180580ca0 EFLAGS: 00010046\n  RAX: 0000000000000000 RBX: ffffafe180a3f7a8 RCX: 0000000000000011\n  RDX: 0000000000000001 RSI: 0000000000000003 RDI: ffffafe180a40084\n  RBP: 0000000000000000 R08: 00000000001e7240 R09: 0000000000000011\n  R10: 0000000000000028 R11: 0000000000000888 R12: 0000000000000002\n  R13: ffffafe180a40084 R14: 0000000000000000 R15: 0000000000000003\n  FS:  0000000000000000(0000) GS:ffff9aaf1f280000(0000) knlGS:0000000000000000\n  CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n  CR2: ffffafe180a40084 CR3: 000000010e428002 CR4: 0000000000770ef0\n  DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\n  DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\n  PKRU: 55555554\n  Call Trace:\n   \u003cIRQ\u003e\n   try_to_wake_up+0x5a/0x6a0\n   rq_qos_wake_function+0x71/0x80\n   __wake_up_common+0x75/0xa0\n   __wake_up+0x36/0x60\n   scale_up.part.0+0x50/0x110\n   wb_timer_fn+0x227/0x450\n   ...\n\nSo rq_qos_wake_function() calls wake_up_process(data-\u003etask), which calls\ntry_to_wake_up(), which faults in raw_spin_lock_irqsave(\u0026p-\u003epi_lock).\n\np comes from data-\u003etask, and data comes from the waitqueue entry, which\nis stored on the waiter\u0027s stack in rq_qos_wait(). Analyzing the core\ndump with drgn, I found that the waiter had already woken up and moved\non to a completely unrelated code path, clobbering what was previously\ndata-\u003etask. Meanwhile, the waker was passing the clobbered garbage in\ndata-\u003etask to wake_up_process(), leading to the crash.\n\nWhat\u0027s happening is that in between rq_qos_wake_function() deleting the\nwaitqueue entry and calling wake_up_process(), rq_qos_wait() is finding\nthat it already got a token and returning. The race looks like this:\n\nrq_qos_wait()                           rq_qos_wake_function()\n==============================================================\nprepare_to_wait_exclusive()\n                                        data-\u003egot_token = true;\n                                        list_del_init(\u0026curr-\u003eentry);\nif (data.got_token)\n        break;\nfinish_wait(\u0026rqw-\u003ewait, \u0026data.wq);\n  ^- returns immediately because\n     list_empty_careful(\u0026wq_entry-\u003eentry)\n     is true\n... return, go do something else ...\n                                        wake_up_process(data-\u003etask)\n                                          (NO LONGER VALID!)-^\n\nNormally, finish_wait() is supposed to synchronize against the waker.\nBut, as noted above, it is returning immediately because the waitqueue\nentry has already been removed from the waitqueue.\n\nThe bug is that rq_qos_wake_function() is accessing the waitqueue entry\nAFTER deleting it. Note that autoremove_wake_function() wakes the waiter\nand THEN deletes the waitqueue entry, which is the proper order.\n\nFix it by swapping the order. We also need to use\nlist_del_init_careful() to match the list_empty_careful() in\nfinish_wait()."
        }
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            "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",
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              "lang": "en",
              "value": "AV:L - The vulnerable code is in the block layer\u0027s rq_qos throttling, reached through ordinary bio submission from local syscalls (write/fsync/fallocate PUNCH_HOLE) on any blk-mq-backed filesystem or block device. There is no network-facing protocol parsing involved, so local access is required.\nAC:L - The attacker controls both sides of the race \u2014 waiters are created by saturating the wbt queue depth with concurrent IO, and the wakers are completions of that same attacker-generated IO plus the wbt scale-up timer. The crash was observed occurring naturally under production load, so an attacker deliberately generating heavy concurrent IO can reproduce it reliably.\nPR:L - No capability check, LSM hook, or privilege gate exists anywhere on the path from submit_bio through rq_qos_throttle to rq_qos_wait. Any unprivileged local user who can write to a file or punch holes in one on a device with writeback throttling (enabled by default via CONFIG_BLK_WBT_MQ=y) can reach the vulnerable code.\nUI:N - Exploitation requires only that the attacker submit IO from their own processes; no action by another user or administrator is needed. The race is driven entirely by the attacker\u0027s own workload.\nS:U - The corruption occurs within kernel memory and is exploited by a local user against the same kernel, with no crossing of a virtualization, IOMMU, or sandbox authority boundary. This is a standard in-kernel privilege-escalation scope.\nC:H - This is a use-after-free/use-after-scope on the waiter\u0027s stack frame, and the stale pointer is dereferenced as a task_struct in try_to_wake_up(), causing wide type-confused reads (p-\u003e__state, p-\u003eon_rq, p-\u003eon_cpu, p-\u003ese) from an attacker-influenceable address. Per kernel UAF guidance this yields an information-disclosure primitive over arbitrary kernel memory.\nI:H - try_to_wake_up() performs raw_spin_lock_irqsave(\u0026p-\u003epi_lock) \u2014 an atomic write to a kernel address derived from reused stack contents \u2014 and then modifies scheduler fields and enqueues the fake task on a runqueue. Combined with the attacker\u0027s ability to influence what overwrites that stack slot, this gives a write and control-flow-relevant corruption primitive.\nA:H - The reported failure mode is an immediate kernel oops (supervisor write page fault in _raw_spin_lock_irqsave from IRQ context), and it can also corrupt scheduler state or run-queue linkage. Any such crash or scheduler corruption is a full denial of service, repeatable at will by an unprivileged user."
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: qla2xxx: Fix bsg_done() causing double free\n\nKernel panic observed on system,\n\n[5353358.825191] BUG: unable to handle page fault for address: ff5f5e897b024000\n[5353358.825194] #PF: supervisor write access in kernel mode\n[5353358.825195] #PF: error_code(0x0002) - not-present page\n[5353358.825196] PGD 100006067 P4D 0\n[5353358.825198] Oops: 0002 [#1] PREEMPT SMP NOPTI\n[5353358.825200] CPU: 5 PID: 2132085 Comm: qlafwupdate.sub Kdump: loaded Tainted: G        W    L    -------  ---  5.14.0-503.34.1.el9_5.x86_64 #1\n[5353358.825203] Hardware name: HPE ProLiant DL360 Gen11/ProLiant DL360 Gen11, BIOS 2.44 01/17/2025\n[5353358.825204] RIP: 0010:memcpy_erms+0x6/0x10\n[5353358.825211] RSP: 0018:ff591da8f4f6b710 EFLAGS: 00010246\n[5353358.825212] RAX: ff5f5e897b024000 RBX: 0000000000007090 RCX: 0000000000001000\n[5353358.825213] RDX: 0000000000001000 RSI: ff591da8f4fed090 RDI: ff5f5e897b024000\n[5353358.825214] RBP: 0000000000010000 R08: ff5f5e897b024000 R09: 0000000000000000\n[5353358.825215] R10: ff46cf8c40517000 R11: 0000000000000001 R12: 0000000000008090\n[5353358.825216] R13: ff591da8f4f6b720 R14: 0000000000001000 R15: 0000000000000000\n[5353358.825218] FS:  00007f1e88d47740(0000) GS:ff46cf935f940000(0000) knlGS:0000000000000000\n[5353358.825219] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n[5353358.825220] CR2: ff5f5e897b024000 CR3: 0000000231532004 CR4: 0000000000771ef0\n[5353358.825221] PKRU: 55555554\n[5353358.825222] Call Trace:\n[5353358.825223]  \u003cTASK\u003e\n[5353358.825224]  ? show_trace_log_lvl+0x1c4/0x2df\n[5353358.825229]  ? show_trace_log_lvl+0x1c4/0x2df\n[5353358.825232]  ? sg_copy_buffer+0xc8/0x110\n[5353358.825236]  ? __die_body.cold+0x8/0xd\n[5353358.825238]  ? page_fault_oops+0x134/0x170\n[5353358.825242]  ? kernelmode_fixup_or_oops+0x84/0x110\n[5353358.825244]  ? exc_page_fault+0xa8/0x150\n[5353358.825247]  ? asm_exc_page_fault+0x22/0x30\n[5353358.825252]  ? memcpy_erms+0x6/0x10\n[5353358.825253]  sg_copy_buffer+0xc8/0x110\n[5353358.825259]  qla2x00_process_vendor_specific+0x652/0x1320 [qla2xxx]\n[5353358.825317]  qla24xx_bsg_request+0x1b2/0x2d0 [qla2xxx]\n\nMost routines in qla_bsg.c call bsg_done() only for success cases.\nHowever a few invoke it for failure case as well leading to a double\nfree. Validate before calling bsg_done()."
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmacvlan: fix error recovery in macvlan_common_newlink()\n\nvalis provided a nice repro to crash the kernel:\n\nip link add p1 type veth peer p2\nip link set address 00:00:00:00:00:20 dev p1\nip link set up dev p1\nip link set up dev p2\n\nip link add mv0 link p2 type macvlan mode source\nip link add invalid% link p2 type macvlan mode source macaddr add 00:00:00:00:00:20\n\nping -c1 -I p1 1.2.3.4\n\nHe also gave a very detailed analysis:\n\n\u003cquote valis\u003e\n\nThe issue is triggered when a new macvlan link is created  with\nMACVLAN_MODE_SOURCE mode and MACVLAN_MACADDR_ADD (or\nMACVLAN_MACADDR_SET) parameter, lower device already has a macvlan\nport and register_netdevice() called from macvlan_common_newlink()\nfails (e.g. because of the invalid link name).\n\nIn this case macvlan_hash_add_source is called from\nmacvlan_change_sources() / macvlan_common_newlink():\n\nThis adds a reference to vlan to the port\u0027s vlan_source_hash using\nmacvlan_source_entry.\n\nvlan is a pointer to the priv data of the link that is being created.\n\nWhen register_netdevice() fails, the error is returned from\nmacvlan_newlink() to rtnl_newlink_create():\n\n        if (ops-\u003enewlink)\n                err = ops-\u003enewlink(dev, \u0026params, extack);\n        else\n                err = register_netdevice(dev);\n        if (err \u003c 0) {\n                free_netdev(dev);\n                goto out;\n        }\n\nand free_netdev() is called, causing a kvfree() on the struct\nnet_device that is still referenced in the source entry attached to\nthe lower device\u0027s macvlan port.\n\nNow all packets sent on the macvlan port with a matching source mac\naddress will trigger a use-after-free in macvlan_forward_source().\n\n\u003c/quote valis\u003e\n\nWith all that, my fix is to make sure we call macvlan_flush_sources()\nregardless of @create value whenever \"goto destroy_macvlan_port;\"\npath is taken.\n\nMany thanks to valis for following up on this issue."
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            "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",
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              "value": "AV:L - Triggering the vulnerability requires CAP_NET_ADMIN to create macvlan interfaces, which is reachable via user namespaces (unshare -Urn) by an unprivileged local user. The setup is local even though the UAF is triggered by network packets.\nAC:L - The vulnerability is deterministically triggered by a straightforward sequence: create a macvlan source with a known-bad interface name to cause register_netdevice() failure, then send a packet with the matching source MAC. No race condition or special conditions needed.\nPR:L - Requires CAP_NET_ADMIN for RTM_NEWLINK netlink operations, but this capability is obtainable by any unprivileged user through user namespaces (unshare -Urn), as netlink_net_capable checks against the network namespace\u0027s user_ns, not init_user_ns.\nUI:N - No user interaction is needed. The attacker sets up the vulnerable macvlan configuration and triggers the UAF by sending packets on the lower device, all without any victim action.\nS:U - The vulnerability operates within the kernel\u0027s security context. While it allows kernel code execution, it does not cross a virtualization or sandbox boundary \u2014 it is standard kernel privilege escalation.\nC:H - The use-after-free in macvlan_forward_source() dereferences a freed macvlan_dev structure. An attacker can reclaim the freed memory via heap spraying, enabling arbitrary kernel memory reads through controlled object contents.\nI:H - The UAF accesses and writes to the freed macvlan_dev structure (e.g., macvlan_count_rx updates statistics). With heap spraying to reclaim the freed object, this provides arbitrary write primitives that can be leveraged for code execution.\nA:H - The use-after-free causes dereferencing of freed memory, which reliably causes kernel crashes (oops/panic) when the freed memory is reclaimed for other purposes. The reproducer in the commit message demonstrates a reliable crash."
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        {
          "url": "https://git.kernel.org/stable/c/f8db6475a83649689c087a8f52486fcc53e627e9"
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    "cveId": "CVE-2026-23209",
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    "dateReserved": "2026-01-13T15:37:45.986Z",
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