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CVE-2024-26746 (GCVE-0-2024-26746)

Vulnerability from cvelistv5 – Published: 2024-04-04 08:20 – Updated: 2026-05-11 20:03
VLAI
Title
dmaengine: idxd: Ensure safe user copy of completion record
Summary
In the Linux kernel, the following vulnerability has been resolved: dmaengine: idxd: Ensure safe user copy of completion record If CONFIG_HARDENED_USERCOPY is enabled, copying completion record from event log cache to user triggers a kernel bug. [ 1987.159822] usercopy: Kernel memory exposure attempt detected from SLUB object 'dsa0' (offset 74, size 31)! [ 1987.170845] ------------[ cut here ]------------ [ 1987.176086] kernel BUG at mm/usercopy.c:102! [ 1987.180946] invalid opcode: 0000 [#1] PREEMPT SMP NOPTI [ 1987.186866] CPU: 17 PID: 528 Comm: kworker/17:1 Not tainted 6.8.0-rc2+ #5 [ 1987.194537] Hardware name: Intel Corporation AvenueCity/AvenueCity, BIOS BHSDCRB1.86B.2492.D03.2307181620 07/18/2023 [ 1987.206405] Workqueue: wq0.0 idxd_evl_fault_work [idxd] [ 1987.212338] RIP: 0010:usercopy_abort+0x72/0x90 [ 1987.217381] Code: 58 65 9c 50 48 c7 c2 17 85 61 9c 57 48 c7 c7 98 fd 6b 9c 48 0f 44 d6 48 c7 c6 b3 08 62 9c 4c 89 d1 49 0f 44 f3 e8 1e 2e d5 ff <0f> 0b 49 c7 c1 9e 42 61 9c 4c 89 cf 4d 89 c8 eb a9 66 66 2e 0f 1f [ 1987.238505] RSP: 0018:ff62f5cf20607d60 EFLAGS: 00010246 [ 1987.244423] RAX: 000000000000005f RBX: 000000000000001f RCX: 0000000000000000 [ 1987.252480] RDX: 0000000000000000 RSI: ffffffff9c61429e RDI: 00000000ffffffff [ 1987.260538] RBP: ff62f5cf20607d78 R08: ff2a6a89ef3fffe8 R09: 00000000fffeffff [ 1987.268595] R10: ff2a6a89eed00000 R11: 0000000000000003 R12: ff2a66934849c89a [ 1987.276652] R13: 0000000000000001 R14: ff2a66934849c8b9 R15: ff2a66934849c899 [ 1987.284710] FS: 0000000000000000(0000) GS:ff2a66b22fe40000(0000) knlGS:0000000000000000 [ 1987.293850] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 1987.300355] CR2: 00007fe291a37000 CR3: 000000010fbd4005 CR4: 0000000000f71ef0 [ 1987.308413] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 1987.316470] DR3: 0000000000000000 DR6: 00000000fffe07f0 DR7: 0000000000000400 [ 1987.324527] PKRU: 55555554 [ 1987.327622] Call Trace: [ 1987.330424] <TASK> [ 1987.332826] ? show_regs+0x6e/0x80 [ 1987.336703] ? die+0x3c/0xa0 [ 1987.339988] ? do_trap+0xd4/0xf0 [ 1987.343662] ? do_error_trap+0x75/0xa0 [ 1987.347922] ? usercopy_abort+0x72/0x90 [ 1987.352277] ? exc_invalid_op+0x57/0x80 [ 1987.356634] ? usercopy_abort+0x72/0x90 [ 1987.360988] ? asm_exc_invalid_op+0x1f/0x30 [ 1987.365734] ? usercopy_abort+0x72/0x90 [ 1987.370088] __check_heap_object+0xb7/0xd0 [ 1987.374739] __check_object_size+0x175/0x2d0 [ 1987.379588] idxd_copy_cr+0xa9/0x130 [idxd] [ 1987.384341] idxd_evl_fault_work+0x127/0x390 [idxd] [ 1987.389878] process_one_work+0x13e/0x300 [ 1987.394435] ? __pfx_worker_thread+0x10/0x10 [ 1987.399284] worker_thread+0x2f7/0x420 [ 1987.403544] ? _raw_spin_unlock_irqrestore+0x2b/0x50 [ 1987.409171] ? __pfx_worker_thread+0x10/0x10 [ 1987.414019] kthread+0x107/0x140 [ 1987.417693] ? __pfx_kthread+0x10/0x10 [ 1987.421954] ret_from_fork+0x3d/0x60 [ 1987.426019] ? __pfx_kthread+0x10/0x10 [ 1987.430281] ret_from_fork_asm+0x1b/0x30 [ 1987.434744] </TASK> The issue arises because event log cache is created using kmem_cache_create() which is not suitable for user copy. Fix the issue by creating event log cache with kmem_cache_create_usercopy(), ensuring safe user copy.
Severity
No CVSS data available.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-04-04 16:00 UTC
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: c2f156bf168fb42cd6ecd0a8e2204dbe542b8516 , < 5e3022ea42e490a36ec6f2cfa6fc603deb0bace4 (git)
Affected: c2f156bf168fb42cd6ecd0a8e2204dbe542b8516 , < bb71e040323175e18c233a9afef32ba14fa64eb7 (git)
Affected: c2f156bf168fb42cd6ecd0a8e2204dbe542b8516 , < d3ea125df37dc37972d581b74a5d3785c3f283ab (git)
guessed Create a notification for this product.
Linux Linux Affected: 6.4
Unaffected: 0 , < 6.4 (semver)
Unaffected: 6.6.21 , ≤ 6.6.* (semver)
Unaffected: 6.7.9 , ≤ 6.7.* (semver)
Unaffected: 6.8 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website
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                "id": "CVE-2024-26746",
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                "role": "CISA Coordinator",
                "timestamp": "2024-04-04T16:00:23.530084Z",
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndmaengine: idxd: Ensure safe user copy of completion record\n\nIf CONFIG_HARDENED_USERCOPY is enabled, copying completion record from\nevent log cache to user triggers a kernel bug.\n\n[ 1987.159822] usercopy: Kernel memory exposure attempt detected from SLUB object \u0027dsa0\u0027 (offset 74, size 31)!\n[ 1987.170845] ------------[ cut here ]------------\n[ 1987.176086] kernel BUG at mm/usercopy.c:102!\n[ 1987.180946] invalid opcode: 0000 [#1] PREEMPT SMP NOPTI\n[ 1987.186866] CPU: 17 PID: 528 Comm: kworker/17:1 Not tainted 6.8.0-rc2+ #5\n[ 1987.194537] Hardware name: Intel Corporation AvenueCity/AvenueCity, BIOS BHSDCRB1.86B.2492.D03.2307181620 07/18/2023\n[ 1987.206405] Workqueue: wq0.0 idxd_evl_fault_work [idxd]\n[ 1987.212338] RIP: 0010:usercopy_abort+0x72/0x90\n[ 1987.217381] Code: 58 65 9c 50 48 c7 c2 17 85 61 9c 57 48 c7 c7 98 fd 6b 9c 48 0f 44 d6 48 c7 c6 b3 08 62 9c 4c 89 d1 49 0f 44 f3 e8 1e 2e d5 ff \u003c0f\u003e 0b 49 c7 c1 9e 42 61 9c 4c 89 cf 4d 89 c8 eb a9 66 66 2e 0f 1f\n[ 1987.238505] RSP: 0018:ff62f5cf20607d60 EFLAGS: 00010246\n[ 1987.244423] RAX: 000000000000005f RBX: 000000000000001f RCX: 0000000000000000\n[ 1987.252480] RDX: 0000000000000000 RSI: ffffffff9c61429e RDI: 00000000ffffffff\n[ 1987.260538] RBP: ff62f5cf20607d78 R08: ff2a6a89ef3fffe8 R09: 00000000fffeffff\n[ 1987.268595] R10: ff2a6a89eed00000 R11: 0000000000000003 R12: ff2a66934849c89a\n[ 1987.276652] R13: 0000000000000001 R14: ff2a66934849c8b9 R15: ff2a66934849c899\n[ 1987.284710] FS:  0000000000000000(0000) GS:ff2a66b22fe40000(0000) knlGS:0000000000000000\n[ 1987.293850] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n[ 1987.300355] CR2: 00007fe291a37000 CR3: 000000010fbd4005 CR4: 0000000000f71ef0\n[ 1987.308413] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\n[ 1987.316470] DR3: 0000000000000000 DR6: 00000000fffe07f0 DR7: 0000000000000400\n[ 1987.324527] PKRU: 55555554\n[ 1987.327622] Call Trace:\n[ 1987.330424]  \u003cTASK\u003e\n[ 1987.332826]  ? show_regs+0x6e/0x80\n[ 1987.336703]  ? die+0x3c/0xa0\n[ 1987.339988]  ? do_trap+0xd4/0xf0\n[ 1987.343662]  ? do_error_trap+0x75/0xa0\n[ 1987.347922]  ? usercopy_abort+0x72/0x90\n[ 1987.352277]  ? exc_invalid_op+0x57/0x80\n[ 1987.356634]  ? usercopy_abort+0x72/0x90\n[ 1987.360988]  ? asm_exc_invalid_op+0x1f/0x30\n[ 1987.365734]  ? usercopy_abort+0x72/0x90\n[ 1987.370088]  __check_heap_object+0xb7/0xd0\n[ 1987.374739]  __check_object_size+0x175/0x2d0\n[ 1987.379588]  idxd_copy_cr+0xa9/0x130 [idxd]\n[ 1987.384341]  idxd_evl_fault_work+0x127/0x390 [idxd]\n[ 1987.389878]  process_one_work+0x13e/0x300\n[ 1987.394435]  ? __pfx_worker_thread+0x10/0x10\n[ 1987.399284]  worker_thread+0x2f7/0x420\n[ 1987.403544]  ? _raw_spin_unlock_irqrestore+0x2b/0x50\n[ 1987.409171]  ? __pfx_worker_thread+0x10/0x10\n[ 1987.414019]  kthread+0x107/0x140\n[ 1987.417693]  ? __pfx_kthread+0x10/0x10\n[ 1987.421954]  ret_from_fork+0x3d/0x60\n[ 1987.426019]  ? __pfx_kthread+0x10/0x10\n[ 1987.430281]  ret_from_fork_asm+0x1b/0x30\n[ 1987.434744]  \u003c/TASK\u003e\n\nThe issue arises because event log cache is created using\nkmem_cache_create() which is not suitable for user copy.\n\nFix the issue by creating event log cache with\nkmem_cache_create_usercopy(), ensuring safe user copy."
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        "dateUpdated": "2026-05-11T20:03:21.898Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/5e3022ea42e490a36ec6f2cfa6fc603deb0bace4"
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        {
          "url": "https://git.kernel.org/stable/c/d3ea125df37dc37972d581b74a5d3785c3f283ab"
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      ],
      "title": "dmaengine: idxd: Ensure safe user copy of completion record",
      "x_generator": {
        "engine": "bippy-1.2.0"
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2024-26746",
    "datePublished": "2024-04-04T08:20:13.846Z",
    "dateReserved": "2024-02-19T14:20:24.168Z",
    "dateUpdated": "2026-05-11T20:03:21.898Z",
    "state": "PUBLISHED"
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  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2024-26746",
      "date": "2026-09-14",
      "epss": "0.00225",
      "percentile": "0.1322"
    },
    "fkie_nvd": {
      "descriptions": "[{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\ndmaengine: idxd: Ensure safe user copy of completion record\\n\\nIf CONFIG_HARDENED_USERCOPY is enabled, copying completion record from\\nevent log cache to user triggers a kernel bug.\\n\\n[ 1987.159822] usercopy: Kernel memory exposure attempt detected from SLUB object \u0027dsa0\u0027 (offset 74, size 31)!\\n[ 1987.170845] ------------[ cut here ]------------\\n[ 1987.176086] kernel BUG at mm/usercopy.c:102!\\n[ 1987.180946] invalid opcode: 0000 [#1] PREEMPT SMP NOPTI\\n[ 1987.186866] CPU: 17 PID: 528 Comm: kworker/17:1 Not tainted 6.8.0-rc2+ #5\\n[ 1987.194537] Hardware name: Intel Corporation AvenueCity/AvenueCity, BIOS BHSDCRB1.86B.2492.D03.2307181620 07/18/2023\\n[ 1987.206405] Workqueue: wq0.0 idxd_evl_fault_work [idxd]\\n[ 1987.212338] RIP: 0010:usercopy_abort+0x72/0x90\\n[ 1987.217381] Code: 58 65 9c 50 48 c7 c2 17 85 61 9c 57 48 c7 c7 98 fd 6b 9c 48 0f 44 d6 48 c7 c6 b3 08 62 9c 4c 89 d1 49 0f 44 f3 e8 1e 2e d5 ff \u003c0f\u003e 0b 49 c7 c1 9e 42 61 9c 4c 89 cf 4d 89 c8 eb a9 66 66 2e 0f 1f\\n[ 1987.238505] RSP: 0018:ff62f5cf20607d60 EFLAGS: 00010246\\n[ 1987.244423] RAX: 000000000000005f RBX: 000000000000001f RCX: 0000000000000000\\n[ 1987.252480] RDX: 0000000000000000 RSI: ffffffff9c61429e RDI: 00000000ffffffff\\n[ 1987.260538] RBP: ff62f5cf20607d78 R08: ff2a6a89ef3fffe8 R09: 00000000fffeffff\\n[ 1987.268595] R10: ff2a6a89eed00000 R11: 0000000000000003 R12: ff2a66934849c89a\\n[ 1987.276652] R13: 0000000000000001 R14: ff2a66934849c8b9 R15: ff2a66934849c899\\n[ 1987.284710] FS:  0000000000000000(0000) GS:ff2a66b22fe40000(0000) knlGS:0000000000000000\\n[ 1987.293850] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\\n[ 1987.300355] CR2: 00007fe291a37000 CR3: 000000010fbd4005 CR4: 0000000000f71ef0\\n[ 1987.308413] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\\n[ 1987.316470] DR3: 0000000000000000 DR6: 00000000fffe07f0 DR7: 0000000000000400\\n[ 1987.324527] PKRU: 55555554\\n[ 1987.327622] Call Trace:\\n[ 1987.330424]  \u003cTASK\u003e\\n[ 1987.332826]  ? show_regs+0x6e/0x80\\n[ 1987.336703]  ? die+0x3c/0xa0\\n[ 1987.339988]  ? do_trap+0xd4/0xf0\\n[ 1987.343662]  ? do_error_trap+0x75/0xa0\\n[ 1987.347922]  ? usercopy_abort+0x72/0x90\\n[ 1987.352277]  ? exc_invalid_op+0x57/0x80\\n[ 1987.356634]  ? usercopy_abort+0x72/0x90\\n[ 1987.360988]  ? asm_exc_invalid_op+0x1f/0x30\\n[ 1987.365734]  ? usercopy_abort+0x72/0x90\\n[ 1987.370088]  __check_heap_object+0xb7/0xd0\\n[ 1987.374739]  __check_object_size+0x175/0x2d0\\n[ 1987.379588]  idxd_copy_cr+0xa9/0x130 [idxd]\\n[ 1987.384341]  idxd_evl_fault_work+0x127/0x390 [idxd]\\n[ 1987.389878]  process_one_work+0x13e/0x300\\n[ 1987.394435]  ? __pfx_worker_thread+0x10/0x10\\n[ 1987.399284]  worker_thread+0x2f7/0x420\\n[ 1987.403544]  ? _raw_spin_unlock_irqrestore+0x2b/0x50\\n[ 1987.409171]  ? __pfx_worker_thread+0x10/0x10\\n[ 1987.414019]  kthread+0x107/0x140\\n[ 1987.417693]  ? __pfx_kthread+0x10/0x10\\n[ 1987.421954]  ret_from_fork+0x3d/0x60\\n[ 1987.426019]  ? __pfx_kthread+0x10/0x10\\n[ 1987.430281]  ret_from_fork_asm+0x1b/0x30\\n[ 1987.434744]  \u003c/TASK\u003e\\n\\nThe issue arises because event log cache is created using\\nkmem_cache_create() which is not suitable for user copy.\\n\\nFix the issue by creating event log cache with\\nkmem_cache_create_usercopy(), ensuring safe user copy.\"}, {\"lang\": \"es\", \"value\": \"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: dmaengine: idxd: garantiza una copia segura del registro de finalizaci\\u00f3n para el usuario. Si CONFIG_HARDENED_USERCOPY est\\u00e1 habilitado, copiar el registro de finalizaci\\u00f3n desde la cach\\u00e9 del registro de eventos al usuario desencadena un error en el kernel. [ 1987.159822] usercopy: Kernel memory exposure attempt detected from SLUB object \u0027dsa0\u0027 (offset 74, size 31)! [ 1987.170845] ------------[ cut here ]------------ [ 1987.176086] kernel BUG at mm/usercopy.c:102! [ 1987.180946] invalid opcode: 0000 [#1] PREEMPT SMP NOPTI [ 1987.186866] CPU: 17 PID: 528 Comm: kworker/17:1 Not tainted 6.8.0-rc2+ #5 [ 1987.194537] Hardware name: Intel Corporation AvenueCity/AvenueCity, BIOS BHSDCRB1.86B.2492.D03.2307181620 07/18/2023 [ 1987.206405] Workqueue: wq0.0 idxd_evl_fault_work [idxd] [ 1987.212338] RIP: 0010:usercopy_abort+0x72/0x90 [ 1987.217381] Code: 58 65 9c 50 48 c7 c2 17 85 61 9c 57 48 c7 c7 98 fd 6b 9c 48 0f 44 d6 48 c7 c6 b3 08 62 9c 4c 89 d1 49 0f 44 f3 e8 1e 2e d5 ff \u0026lt;0f\u0026gt; 0b 49 c7 c1 9e 42 61 9c 4c 89 cf 4d 89 c8 eb a9 66 66 2e 0f 1f [ 1987.238505] RSP: 0018:ff62f5cf20607d60 EFLAGS: 00010246 [ 1987.244423] RAX: 000000000000005f RBX: 000000000000001f RCX: 0000000000000000 [ 1987.252480] RDX: 0000000000000000 RSI: ffffffff9c61429e RDI: 00000000ffffffff [ 1987.260538] RBP: ff62f5cf20607d78 R08: ff2a6a89ef3fffe8 R09: 00000000fffeffff [ 1987.268595] R10: ff2a6a89eed00000 R11: 0000000000000003 R12: ff2a66934849c89a [ 1987.276652] R13: 0000000000000001 R14: ff2a66934849c8b9 R15: ff2a66934849c899 [ 1987.284710] FS: 0000000000000000(0000) GS:ff2a66b22fe40000(0000) knlGS:0000000000000000 [ 1987.293850] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 1987.300355] CR2: 00007fe291a37000 CR3: 000000010fbd4005 CR4: 0000000000f71ef0 [ 1987.308413] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 1987.316470] DR3: 0000000000000000 DR6: 00000000fffe07f0 DR7: 0000000000000400 [ 1987.324527] PKRU: 55555554 [ 1987.327622] Call Trace: [ 1987.330424]  [ 1987.332826] ? show_regs+0x6e/0x80 [ 1987.336703] ? die+0x3c/0xa0 [ 1987.339988] ? do_trap+0xd4/0xf0 [ 1987.343662] ? do_error_trap+0x75/0xa0 [ 1987.347922] ? usercopy_abort+0x72/0x90 [ 1987.352277] ? exc_invalid_op+0x57/0x80 [ 1987.356634] ? usercopy_abort+0x72/0x90 [ 1987.360988] ? asm_exc_invalid_op+0x1f/0x30 [ 1987.365734] ? usercopy_abort+0x72/0x90 [ 1987.370088] __check_heap_object+0xb7/0xd0 [ 1987.374739] __check_object_size+0x175/0x2d0 [ 1987.379588] idxd_copy_cr+0xa9/0x130 [idxd] [ 1987.384341] idxd_evl_fault_work+0x127/0x390 [idxd] [ 1987.389878] process_one_work+0x13e/0x300 [ 1987.394435] ? __pfx_worker_thread+0x10/0x10 [ 1987.399284] worker_thread+0x2f7/0x420 [ 1987.403544] ? _raw_spin_unlock_irqrestore+0x2b/0x50 [ 1987.409171] ? __pfx_worker_thread+0x10/0x10 [ 1987.414019] kthread+0x107/0x140 [ 1987.417693] ? __pfx_kthread+0x10/0x10 [ 1987.421954] ret_from_fork+0x3d/0x60 [ 1987.426019] ? __pfx_kthread+0x10/0x10 [ 1987.430281] ret_from_fork_asm+0x1b/0x30 [ 1987.434744]  . El problema surge porque la cach\\u00e9 del registro de eventos se crea usando kmem_cache_create(), que no es adecuado para la copia del usuario. Solucione el problema creando un cach\\u00e9 de registro de eventos con kmem_cache_create_usercopy(), lo que garantiza una copia segura para el usuario.\"}]",
      "id": "CVE-2024-26746",
      "lastModified": "2024-11-21T09:02:58.613",
      "published": "2024-04-04T09:15:07.783",
      "references": "[{\"url\": \"https://git.kernel.org/stable/c/5e3022ea42e490a36ec6f2cfa6fc603deb0bace4\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}, {\"url\": \"https://git.kernel.org/stable/c/bb71e040323175e18c233a9afef32ba14fa64eb7\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}, {\"url\": \"https://git.kernel.org/stable/c/d3ea125df37dc37972d581b74a5d3785c3f283ab\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}, {\"url\": \"https://git.kernel.org/stable/c/5e3022ea42e490a36ec6f2cfa6fc603deb0bace4\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"https://git.kernel.org/stable/c/bb71e040323175e18c233a9afef32ba14fa64eb7\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"https://git.kernel.org/stable/c/d3ea125df37dc37972d581b74a5d3785c3f283ab\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}]",
      "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "vulnStatus": "Awaiting Analysis"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2024-26746\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-04-04T09:15:07.783\",\"lastModified\":\"2026-06-17T07:18:14.377\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\ndmaengine: idxd: Ensure safe user copy of completion record\\n\\nIf CONFIG_HARDENED_USERCOPY is enabled, copying completion record from\\nevent log cache to user triggers a kernel bug.\\n\\n[ 1987.159822] usercopy: Kernel memory exposure attempt detected from SLUB object \u0027dsa0\u0027 (offset 74, size 31)!\\n[ 1987.170845] ------------[ cut here ]------------\\n[ 1987.176086] kernel BUG at mm/usercopy.c:102!\\n[ 1987.180946] invalid opcode: 0000 [#1] PREEMPT SMP NOPTI\\n[ 1987.186866] CPU: 17 PID: 528 Comm: kworker/17:1 Not tainted 6.8.0-rc2+ #5\\n[ 1987.194537] Hardware name: Intel Corporation AvenueCity/AvenueCity, BIOS BHSDCRB1.86B.2492.D03.2307181620 07/18/2023\\n[ 1987.206405] Workqueue: wq0.0 idxd_evl_fault_work [idxd]\\n[ 1987.212338] RIP: 0010:usercopy_abort+0x72/0x90\\n[ 1987.217381] Code: 58 65 9c 50 48 c7 c2 17 85 61 9c 57 48 c7 c7 98 fd 6b 9c 48 0f 44 d6 48 c7 c6 b3 08 62 9c 4c 89 d1 49 0f 44 f3 e8 1e 2e d5 ff \u003c0f\u003e 0b 49 c7 c1 9e 42 61 9c 4c 89 cf 4d 89 c8 eb a9 66 66 2e 0f 1f\\n[ 1987.238505] RSP: 0018:ff62f5cf20607d60 EFLAGS: 00010246\\n[ 1987.244423] RAX: 000000000000005f RBX: 000000000000001f RCX: 0000000000000000\\n[ 1987.252480] RDX: 0000000000000000 RSI: ffffffff9c61429e RDI: 00000000ffffffff\\n[ 1987.260538] RBP: ff62f5cf20607d78 R08: ff2a6a89ef3fffe8 R09: 00000000fffeffff\\n[ 1987.268595] R10: ff2a6a89eed00000 R11: 0000000000000003 R12: ff2a66934849c89a\\n[ 1987.276652] R13: 0000000000000001 R14: ff2a66934849c8b9 R15: ff2a66934849c899\\n[ 1987.284710] FS:  0000000000000000(0000) GS:ff2a66b22fe40000(0000) knlGS:0000000000000000\\n[ 1987.293850] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\\n[ 1987.300355] CR2: 00007fe291a37000 CR3: 000000010fbd4005 CR4: 0000000000f71ef0\\n[ 1987.308413] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\\n[ 1987.316470] DR3: 0000000000000000 DR6: 00000000fffe07f0 DR7: 0000000000000400\\n[ 1987.324527] PKRU: 55555554\\n[ 1987.327622] Call Trace:\\n[ 1987.330424]  \u003cTASK\u003e\\n[ 1987.332826]  ? show_regs+0x6e/0x80\\n[ 1987.336703]  ? die+0x3c/0xa0\\n[ 1987.339988]  ? do_trap+0xd4/0xf0\\n[ 1987.343662]  ? do_error_trap+0x75/0xa0\\n[ 1987.347922]  ? usercopy_abort+0x72/0x90\\n[ 1987.352277]  ? exc_invalid_op+0x57/0x80\\n[ 1987.356634]  ? usercopy_abort+0x72/0x90\\n[ 1987.360988]  ? asm_exc_invalid_op+0x1f/0x30\\n[ 1987.365734]  ? usercopy_abort+0x72/0x90\\n[ 1987.370088]  __check_heap_object+0xb7/0xd0\\n[ 1987.374739]  __check_object_size+0x175/0x2d0\\n[ 1987.379588]  idxd_copy_cr+0xa9/0x130 [idxd]\\n[ 1987.384341]  idxd_evl_fault_work+0x127/0x390 [idxd]\\n[ 1987.389878]  process_one_work+0x13e/0x300\\n[ 1987.394435]  ? __pfx_worker_thread+0x10/0x10\\n[ 1987.399284]  worker_thread+0x2f7/0x420\\n[ 1987.403544]  ? _raw_spin_unlock_irqrestore+0x2b/0x50\\n[ 1987.409171]  ? __pfx_worker_thread+0x10/0x10\\n[ 1987.414019]  kthread+0x107/0x140\\n[ 1987.417693]  ? __pfx_kthread+0x10/0x10\\n[ 1987.421954]  ret_from_fork+0x3d/0x60\\n[ 1987.426019]  ? __pfx_kthread+0x10/0x10\\n[ 1987.430281]  ret_from_fork_asm+0x1b/0x30\\n[ 1987.434744]  \u003c/TASK\u003e\\n\\nThe issue arises because event log cache is created using\\nkmem_cache_create() which is not suitable for user copy.\\n\\nFix the issue by creating event log cache with\\nkmem_cache_create_usercopy(), ensuring safe user copy.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: dmaengine: idxd: garantiza una copia segura del registro de finalizaci\u00f3n para el usuario. Si CONFIG_HARDENED_USERCOPY est\u00e1 habilitado, copiar el registro de finalizaci\u00f3n desde la cach\u00e9 del registro de eventos al usuario desencadena un error en el kernel. [ 1987.159822] usercopy: Kernel memory exposure attempt detected from SLUB object \u0027dsa0\u0027 (offset 74, size 31)! [ 1987.170845] ------------[ cut here ]------------ [ 1987.176086] kernel BUG at mm/usercopy.c:102! [ 1987.180946] invalid opcode: 0000 [#1] PREEMPT SMP NOPTI [ 1987.186866] CPU: 17 PID: 528 Comm: kworker/17:1 Not tainted 6.8.0-rc2+ #5 [ 1987.194537] Hardware name: Intel Corporation AvenueCity/AvenueCity, BIOS BHSDCRB1.86B.2492.D03.2307181620 07/18/2023 [ 1987.206405] Workqueue: wq0.0 idxd_evl_fault_work [idxd] [ 1987.212338] RIP: 0010:usercopy_abort+0x72/0x90 [ 1987.217381] Code: 58 65 9c 50 48 c7 c2 17 85 61 9c 57 48 c7 c7 98 fd 6b 9c 48 0f 44 d6 48 c7 c6 b3 08 62 9c 4c 89 d1 49 0f 44 f3 e8 1e 2e d5 ff \u0026lt;0f\u0026gt; 0b 49 c7 c1 9e 42 61 9c 4c 89 cf 4d 89 c8 eb a9 66 66 2e 0f 1f [ 1987.238505] RSP: 0018:ff62f5cf20607d60 EFLAGS: 00010246 [ 1987.244423] RAX: 000000000000005f RBX: 000000000000001f RCX: 0000000000000000 [ 1987.252480] RDX: 0000000000000000 RSI: ffffffff9c61429e RDI: 00000000ffffffff [ 1987.260538] RBP: ff62f5cf20607d78 R08: ff2a6a89ef3fffe8 R09: 00000000fffeffff [ 1987.268595] R10: ff2a6a89eed00000 R11: 0000000000000003 R12: ff2a66934849c89a [ 1987.276652] R13: 0000000000000001 R14: ff2a66934849c8b9 R15: ff2a66934849c899 [ 1987.284710] FS: 0000000000000000(0000) GS:ff2a66b22fe40000(0000) knlGS:0000000000000000 [ 1987.293850] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 1987.300355] CR2: 00007fe291a37000 CR3: 000000010fbd4005 CR4: 0000000000f71ef0 [ 1987.308413] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 1987.316470] DR3: 0000000000000000 DR6: 00000000fffe07f0 DR7: 0000000000000400 [ 1987.324527] PKRU: 55555554 [ 1987.327622] Call Trace: [ 1987.330424]  [ 1987.332826] ? show_regs+0x6e/0x80 [ 1987.336703] ? die+0x3c/0xa0 [ 1987.339988] ? do_trap+0xd4/0xf0 [ 1987.343662] ? do_error_trap+0x75/0xa0 [ 1987.347922] ? usercopy_abort+0x72/0x90 [ 1987.352277] ? exc_invalid_op+0x57/0x80 [ 1987.356634] ? usercopy_abort+0x72/0x90 [ 1987.360988] ? asm_exc_invalid_op+0x1f/0x30 [ 1987.365734] ? usercopy_abort+0x72/0x90 [ 1987.370088] __check_heap_object+0xb7/0xd0 [ 1987.374739] __check_object_size+0x175/0x2d0 [ 1987.379588] idxd_copy_cr+0xa9/0x130 [idxd] [ 1987.384341] idxd_evl_fault_work+0x127/0x390 [idxd] [ 1987.389878] process_one_work+0x13e/0x300 [ 1987.394435] ? __pfx_worker_thread+0x10/0x10 [ 1987.399284] worker_thread+0x2f7/0x420 [ 1987.403544] ? _raw_spin_unlock_irqrestore+0x2b/0x50 [ 1987.409171] ? __pfx_worker_thread+0x10/0x10 [ 1987.414019] kthread+0x107/0x140 [ 1987.417693] ? __pfx_kthread+0x10/0x10 [ 1987.421954] ret_from_fork+0x3d/0x60 [ 1987.426019] ? __pfx_kthread+0x10/0x10 [ 1987.430281] ret_from_fork_asm+0x1b/0x30 [ 1987.434744]  . El problema surge porque la cach\u00e9 del registro de eventos se crea usando kmem_cache_create(), que no es adecuado para la copia del usuario. Solucione el problema creando un cach\u00e9 de registro de eventos con kmem_cache_create_usercopy(), lo que garantiza una copia segura para el usuario.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/dma/idxd/init.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"c2f156bf168fb42cd6ecd0a8e2204dbe542b8516\",\"lessThan\":\"5e3022ea42e490a36ec6f2cfa6fc603deb0bace4\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"c2f156bf168fb42cd6ecd0a8e2204dbe542b8516\",\"lessThan\":\"bb71e040323175e18c233a9afef32ba14fa64eb7\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"c2f156bf168fb42cd6ecd0a8e2204dbe542b8516\",\"lessThan\":\"d3ea125df37dc37972d581b74a5d3785c3f283ab\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/dma/idxd/init.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"6.4\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"6.4\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.21\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.7.9\",\"lessThanOrEqual\":\"6.7.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.8\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2024-04-04T16:00:23.530084Z\",\"id\":\"CVE-2024-26746\",\"options\":[{\"exploitation\":\"none\"},{\"automatable\":\"no\"},{\"technicalImpact\":\"partial\"}],\"role\":\"CISA Coordinator\",\"version\":\"2.0.3\"}}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"NVD-CWE-noinfo\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.4\",\"versionEndExcluding\":\"6.6.21\",\"matchCriteriaId\":\"584D76D2-1164-4D5F-A720-182A249B363A\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.7\",\"versionEndExcluding\":\"6.7.9\",\"matchCriteriaId\":\"1C538467-EDA0-4A9A-82EB-2925DE9FF827\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.8:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"B9F4EA73-0894-400F-A490-3A397AB7A517\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.8:rc2:*:*:*:*:*:*\",\"matchCriteriaId\":\"056BD938-0A27-4569-B391-30578B309EE3\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.8:rc3:*:*:*:*:*:*\",\"matchCriteriaId\":\"F02056A5-B362-4370-9FF8-6F0BD384D520\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.8:rc4:*:*:*:*:*:*\",\"matchCriteriaId\":\"62075ACE-B2A0-4B16-829D-B3DA5AE5CC41\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.8:rc5:*:*:*:*:*:*\",\"matchCriteriaId\":\"A780F817-2A77-4130-A9B7-5C25606314E3\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.8:rc6:*:*:*:*:*:*\",\"matchCriteriaId\":\"AEB9199B-AB8F-4877-8964-E2BA95B5F15C\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/5e3022ea42e490a36ec6f2cfa6fc603deb0bace4\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/bb71e040323175e18c233a9afef32ba14fa64eb7\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/d3ea125df37dc37972d581b74a5d3785c3f283ab\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/5e3022ea42e490a36ec6f2cfa6fc603deb0bace4\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/bb71e040323175e18c233a9afef32ba14fa64eb7\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/d3ea125df37dc37972d581b74a5d3785c3f283ab\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]}]}}",
    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2026-06-28T07:49:47+00:00",
      "cve": "CVE-2024-26746",
      "id": "CVE-2024-26746",
      "initial_release_date": "2024-04-04T00:00:00+00:00",
      "product_status:fixed": "280",
      "product_status:known_affected": "22",
      "product_status:known_not_affected": "98",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: dmaengine: idxd: Ensure safe user copy of completion record",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2024/cve-2024-26746.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-08-29T01:58:30Z",
      "cve": "CVE-2024-26746",
      "id": "CVE-2024-26746",
      "initial_release_date": "2024-04-09T02:29:04Z",
      "product_status:known_not_affected": "364",
      "product_status:recommended": "202",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2024-26746",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2024-26746.json",
      "version": "35"
    },
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://git.kernel.org/stable/c/5e3022ea42e490a36ec6f2cfa6fc603deb0bace4\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/bb71e040323175e18c233a9afef32ba14fa64eb7\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/d3ea125df37dc37972d581b74a5d3785c3f283ab\", \"tags\": [\"x_transferred\"]}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2024-08-02T00:14:13.241Z\"}}, {\"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2024-26746\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-04-04T16:00:23.530084Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-05-23T19:01:22.084Z\"}, \"title\": \"CISA ADP Vulnrichment\"}], \"cna\": {\"title\": \"dmaengine: idxd: Ensure safe user copy of completion record\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"c2f156bf168fb42cd6ecd0a8e2204dbe542b8516\", \"lessThan\": \"5e3022ea42e490a36ec6f2cfa6fc603deb0bace4\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"c2f156bf168fb42cd6ecd0a8e2204dbe542b8516\", \"lessThan\": \"bb71e040323175e18c233a9afef32ba14fa64eb7\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"c2f156bf168fb42cd6ecd0a8e2204dbe542b8516\", \"lessThan\": \"d3ea125df37dc37972d581b74a5d3785c3f283ab\", \"versionType\": \"git\"}], \"programFiles\": [\"drivers/dma/idxd/init.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"6.4\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"6.4\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"6.6.21\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.7.9\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.7.*\"}, {\"status\": \"unaffected\", \"version\": \"6.8\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"drivers/dma/idxd/init.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/5e3022ea42e490a36ec6f2cfa6fc603deb0bace4\"}, {\"url\": \"https://git.kernel.org/stable/c/bb71e040323175e18c233a9afef32ba14fa64eb7\"}, {\"url\": \"https://git.kernel.org/stable/c/d3ea125df37dc37972d581b74a5d3785c3f283ab\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\ndmaengine: idxd: Ensure safe user copy of completion record\\n\\nIf CONFIG_HARDENED_USERCOPY is enabled, copying completion record from\\nevent log cache to user triggers a kernel bug.\\n\\n[ 1987.159822] usercopy: Kernel memory exposure attempt detected from SLUB object \u0027dsa0\u0027 (offset 74, size 31)!\\n[ 1987.170845] ------------[ cut here ]------------\\n[ 1987.176086] kernel BUG at mm/usercopy.c:102!\\n[ 1987.180946] invalid opcode: 0000 [#1] PREEMPT SMP NOPTI\\n[ 1987.186866] CPU: 17 PID: 528 Comm: kworker/17:1 Not tainted 6.8.0-rc2+ #5\\n[ 1987.194537] Hardware name: Intel Corporation AvenueCity/AvenueCity, BIOS BHSDCRB1.86B.2492.D03.2307181620 07/18/2023\\n[ 1987.206405] Workqueue: wq0.0 idxd_evl_fault_work [idxd]\\n[ 1987.212338] RIP: 0010:usercopy_abort+0x72/0x90\\n[ 1987.217381] Code: 58 65 9c 50 48 c7 c2 17 85 61 9c 57 48 c7 c7 98 fd 6b 9c 48 0f 44 d6 48 c7 c6 b3 08 62 9c 4c 89 d1 49 0f 44 f3 e8 1e 2e d5 ff \u003c0f\u003e 0b 49 c7 c1 9e 42 61 9c 4c 89 cf 4d 89 c8 eb a9 66 66 2e 0f 1f\\n[ 1987.238505] RSP: 0018:ff62f5cf20607d60 EFLAGS: 00010246\\n[ 1987.244423] RAX: 000000000000005f RBX: 000000000000001f RCX: 0000000000000000\\n[ 1987.252480] RDX: 0000000000000000 RSI: ffffffff9c61429e RDI: 00000000ffffffff\\n[ 1987.260538] RBP: ff62f5cf20607d78 R08: ff2a6a89ef3fffe8 R09: 00000000fffeffff\\n[ 1987.268595] R10: ff2a6a89eed00000 R11: 0000000000000003 R12: ff2a66934849c89a\\n[ 1987.276652] R13: 0000000000000001 R14: ff2a66934849c8b9 R15: ff2a66934849c899\\n[ 1987.284710] FS:  0000000000000000(0000) GS:ff2a66b22fe40000(0000) knlGS:0000000000000000\\n[ 1987.293850] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\\n[ 1987.300355] CR2: 00007fe291a37000 CR3: 000000010fbd4005 CR4: 0000000000f71ef0\\n[ 1987.308413] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\\n[ 1987.316470] DR3: 0000000000000000 DR6: 00000000fffe07f0 DR7: 0000000000000400\\n[ 1987.324527] PKRU: 55555554\\n[ 1987.327622] Call Trace:\\n[ 1987.330424]  \u003cTASK\u003e\\n[ 1987.332826]  ? show_regs+0x6e/0x80\\n[ 1987.336703]  ? die+0x3c/0xa0\\n[ 1987.339988]  ? do_trap+0xd4/0xf0\\n[ 1987.343662]  ? do_error_trap+0x75/0xa0\\n[ 1987.347922]  ? usercopy_abort+0x72/0x90\\n[ 1987.352277]  ? exc_invalid_op+0x57/0x80\\n[ 1987.356634]  ? usercopy_abort+0x72/0x90\\n[ 1987.360988]  ? asm_exc_invalid_op+0x1f/0x30\\n[ 1987.365734]  ? usercopy_abort+0x72/0x90\\n[ 1987.370088]  __check_heap_object+0xb7/0xd0\\n[ 1987.374739]  __check_object_size+0x175/0x2d0\\n[ 1987.379588]  idxd_copy_cr+0xa9/0x130 [idxd]\\n[ 1987.384341]  idxd_evl_fault_work+0x127/0x390 [idxd]\\n[ 1987.389878]  process_one_work+0x13e/0x300\\n[ 1987.394435]  ? __pfx_worker_thread+0x10/0x10\\n[ 1987.399284]  worker_thread+0x2f7/0x420\\n[ 1987.403544]  ? _raw_spin_unlock_irqrestore+0x2b/0x50\\n[ 1987.409171]  ? __pfx_worker_thread+0x10/0x10\\n[ 1987.414019]  kthread+0x107/0x140\\n[ 1987.417693]  ? __pfx_kthread+0x10/0x10\\n[ 1987.421954]  ret_from_fork+0x3d/0x60\\n[ 1987.426019]  ? __pfx_kthread+0x10/0x10\\n[ 1987.430281]  ret_from_fork_asm+0x1b/0x30\\n[ 1987.434744]  \u003c/TASK\u003e\\n\\nThe issue arises because event log cache is created using\\nkmem_cache_create() which is not suitable for user copy.\\n\\nFix the issue by creating event log cache with\\nkmem_cache_create_usercopy(), ensuring safe user copy.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.21\", \"versionStartIncluding\": \"6.4\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.7.9\", \"versionStartIncluding\": \"6.4\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.8\", \"versionStartIncluding\": \"6.4\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-05-11T20:03:21.898Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-26746\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-05-11T20:03:21.898Z\", \"dateReserved\": \"2024-02-19T14:20:24.168Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-04-04T08:20:13.846Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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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.