{"id":"CVE-2024-40906","url":"https://www.cyber-defence.io/tools/cve/CVE-2024-40906","generatedAt":"2026-10-28T03:23:51.005Z","title":"In the Linux kernel, the following vulnerability has been resolved: net/mlx5: Always stop health timer during driver removal Currently, if teardown_hca fails to execute during driver removal, mlx5 does not stop the health timer.","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet/mlx5: Always stop health timer during driver removal\n\nCurrently, if teardown_hca fails to execute during driver removal, mlx5\ndoes not stop the health timer. Afterwards, mlx5 continue with driver\nteardown. This may lead to a UAF bug, which results in page fault\nOops[1], since the health timer invokes after resources were freed.\n\nHence, stop the health monitor even if teardown_hca fails.\n\n[1]\nmlx5_core 0000:18:00.0: E-Switch: Unload vfs: mode(LEGACY), nvfs(0), necvfs(0), active vports(0)\nmlx5_core 0000:18:00.0: E-Switch: Disable: mode(LEGACY), nvfs(0), necvfs(0), active vports(0)\nmlx5_core 0000:18:00.0: E-Switch: Disable: mode(LEGACY), nvfs(0), necvfs(0), active vports(0)\nmlx5_core 0000:18:00.0: E-Switch: cleanup\nmlx5_core 0000:18:00.0: wait_func:1155:(pid 1967079): TEARDOWN_HCA(0x103) timeout. Will cause a leak of a command resource\nmlx5_core 0000:18:00.0: mlx5_function_close:1288:(pid 1967079): tear_down_hca failed, skip cleanup\nBUG: unable to handle page fault for address: ffffa26487064230\nPGD 100c00067 P4D 100c00067 PUD 100e5a067 PMD 105ed7067 PTE 0\nOops: 0000 [#1] PREEMPT SMP PTI\nCPU: 0 PID: 0 Comm: swapper/0 Tainted: G           OE     -------  ---  6.7.0-68.fc38.x86_64 #1\nHardware name: Intel Corporation S2600WFT/S2600WFT, BIOS SE5C620.86B.02.01.0013.121520200651 12/15/2020\nRIP: 0010:ioread32be+0x34/0x60\nRSP: 0018:ffffa26480003e58 EFLAGS: 00010292\nRAX: ffffa26487064200 RBX: ffff9042d08161a0 RCX: ffff904c108222c0\nRDX: 000000010bbf1b80 RSI: ffffffffc055ddb0 RDI: ffffa26487064230\nRBP: ffff9042d08161a0 R08: 0000000000000022 R09: ffff904c108222e8\nR10: 0000000000000004 R11: 0000000000000441 R12: ffffffffc055ddb0\nR13: ffffa26487064200 R14: ffffa26480003f00 R15: ffff904c108222c0\nFS:  0000000000000000(0000) GS:ffff904c10800000(0000) knlGS:0000000000000000\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: ffffa26487064230 CR3: 00000002c4420006 CR4: 00000000007706f0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\nPKRU: 55555554\nCall Trace:\n <IRQ>\n ? __die+0x23/0x70\n ? page_fault_oops+0x171/0x4e0\n ? exc_page_fault+0x175/0x180\n ? asm_exc_page_fault+0x26/0x30\n ? __pfx_poll_health+0x10/0x10 [mlx5_core]\n ? __pfx_poll_health+0x10/0x10 [mlx5_core]\n ? ioread32be+0x34/0x60\n mlx5_health_check_fatal_sensors+0x20/0x100 [mlx5_core]\n ? __pfx_poll_health+0x10/0x10 [mlx5_core]\n poll_health+0x42/0x230 [mlx5_core]\n ? __next_timer_interrupt+0xbc/0x110\n ? __pfx_poll_health+0x10/0x10 [mlx5_core]\n call_timer_fn+0x21/0x130\n ? __pfx_poll_health+0x10/0x10 [mlx5_core]\n __run_timers+0x222/0x2c0\n run_timer_softirq+0x1d/0x40\n __do_softirq+0xc9/0x2c8\n __irq_exit_rcu+0xa6/0xc0\n sysvec_apic_timer_interrupt+0x72/0x90\n </IRQ>\n <TASK>\n asm_sysvec_apic_timer_interrupt+0x1a/0x20\nRIP: 0010:cpuidle_enter_state+0xcc/0x440\n ? cpuidle_enter_state+0xbd/0x440\n cpuidle_enter+0x2d/0x40\n do_idle+0x20d/0x270\n cpu_startup_entry+0x2a/0x30\n rest_init+0xd0/0xd0\n arch_call_rest_init+0xe/0x30\n start_kernel+0x709/0xa90\n x86_64_start_reservations+0x18/0x30\n x86_64_start_kernel+0x96/0xa0\n secondary_startup_64_no_verify+0x18f/0x19b\n---[ end trace 0000000000000000 ]---","published":"2024-07-12T13:15:14.000Z","lastModified":"2026-06-17T07:46:50.000Z","status":"Modified","sourceIdentifier":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","cvss":{"version":"3.1","score":7.8,"severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},"cwe":["CWE-416"],"affected":["linux/linux kernel"],"epss":{"score":0.00305,"percentile":0.23025,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.30%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://git.kernel.org/stable/c/6ccada6ffb42e0ac75e3db06d41baf5a7f483f8a","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/c8b3f38d2dae0397944814d691a419c451f9906f","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/e6777ae0bf6fd5bc626bb051c8c93e3c8198a3f8","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/e7d4485d47839f4d1284592ae242c4e65b2810a9","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/6ccada6ffb42e0ac75e3db06d41baf5a7f483f8a","tags":["Patch"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.kernel.org/stable/c/c8b3f38d2dae0397944814d691a419c451f9906f","tags":["Patch"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.kernel.org/stable/c/e6777ae0bf6fd5bc626bb051c8c93e3c8198a3f8","tags":["Patch"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.kernel.org/stable/c/e7d4485d47839f4d1284592ae242c4e65b2810a9","tags":["Patch"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html","source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2024-40906","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}