CVE-2024-53166 (GCVE-0-2024-53166)

Vulnerability from cvelistv5 – Published: 2024-12-27 13:49 – Updated: 2026-07-14 12:38
VLAI
Title
block, bfq: fix bfqq uaf in bfq_limit_depth()
Summary
In the Linux kernel, the following vulnerability has been resolved: block, bfq: fix bfqq uaf in bfq_limit_depth() Set new allocated bfqq to bic or remove freed bfqq from bic are both protected by bfqd->lock, however bfq_limit_depth() is deferencing bfqq from bic without the lock, this can lead to UAF if the io_context is shared by multiple tasks. For example, test bfq with io_uring can trigger following UAF in v6.6: ================================================================== BUG: KASAN: slab-use-after-free in bfqq_group+0x15/0x50 Call Trace: <TASK> dump_stack_lvl+0x47/0x80 print_address_description.constprop.0+0x66/0x300 print_report+0x3e/0x70 kasan_report+0xb4/0xf0 bfqq_group+0x15/0x50 bfqq_request_over_limit+0x130/0x9a0 bfq_limit_depth+0x1b5/0x480 __blk_mq_alloc_requests+0x2b5/0xa00 blk_mq_get_new_requests+0x11d/0x1d0 blk_mq_submit_bio+0x286/0xb00 submit_bio_noacct_nocheck+0x331/0x400 __block_write_full_folio+0x3d0/0x640 writepage_cb+0x3b/0xc0 write_cache_pages+0x254/0x6c0 write_cache_pages+0x254/0x6c0 do_writepages+0x192/0x310 filemap_fdatawrite_wbc+0x95/0xc0 __filemap_fdatawrite_range+0x99/0xd0 filemap_write_and_wait_range.part.0+0x4d/0xa0 blkdev_read_iter+0xef/0x1e0 io_read+0x1b6/0x8a0 io_issue_sqe+0x87/0x300 io_wq_submit_work+0xeb/0x390 io_worker_handle_work+0x24d/0x550 io_wq_worker+0x27f/0x6c0 ret_from_fork_asm+0x1b/0x30 </TASK> Allocated by task 808602: kasan_save_stack+0x1e/0x40 kasan_set_track+0x21/0x30 __kasan_slab_alloc+0x83/0x90 kmem_cache_alloc_node+0x1b1/0x6d0 bfq_get_queue+0x138/0xfa0 bfq_get_bfqq_handle_split+0xe3/0x2c0 bfq_init_rq+0x196/0xbb0 bfq_insert_request.isra.0+0xb5/0x480 bfq_insert_requests+0x156/0x180 blk_mq_insert_request+0x15d/0x440 blk_mq_submit_bio+0x8a4/0xb00 submit_bio_noacct_nocheck+0x331/0x400 __blkdev_direct_IO_async+0x2dd/0x330 blkdev_write_iter+0x39a/0x450 io_write+0x22a/0x840 io_issue_sqe+0x87/0x300 io_wq_submit_work+0xeb/0x390 io_worker_handle_work+0x24d/0x550 io_wq_worker+0x27f/0x6c0 ret_from_fork+0x2d/0x50 ret_from_fork_asm+0x1b/0x30 Freed by task 808589: kasan_save_stack+0x1e/0x40 kasan_set_track+0x21/0x30 kasan_save_free_info+0x27/0x40 __kasan_slab_free+0x126/0x1b0 kmem_cache_free+0x10c/0x750 bfq_put_queue+0x2dd/0x770 __bfq_insert_request.isra.0+0x155/0x7a0 bfq_insert_request.isra.0+0x122/0x480 bfq_insert_requests+0x156/0x180 blk_mq_dispatch_plug_list+0x528/0x7e0 blk_mq_flush_plug_list.part.0+0xe5/0x590 __blk_flush_plug+0x3b/0x90 blk_finish_plug+0x40/0x60 do_writepages+0x19d/0x310 filemap_fdatawrite_wbc+0x95/0xc0 __filemap_fdatawrite_range+0x99/0xd0 filemap_write_and_wait_range.part.0+0x4d/0xa0 blkdev_read_iter+0xef/0x1e0 io_read+0x1b6/0x8a0 io_issue_sqe+0x87/0x300 io_wq_submit_work+0xeb/0x390 io_worker_handle_work+0x24d/0x550 io_wq_worker+0x27f/0x6c0 ret_from_fork+0x2d/0x50 ret_from_fork_asm+0x1b/0x30 Fix the problem by protecting bic_to_bfqq() with bfqd->lock.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 76f1df88bbc2f984eb0418cc90de0a8384e63604 , < ada4ca5fd5a9d5212f28164d49a4885951c979c9 (git)
Affected: 76f1df88bbc2f984eb0418cc90de0a8384e63604 , < 906cdbdd3b018ff69cc830173bce277a847d4fdc (git)
Affected: 76f1df88bbc2f984eb0418cc90de0a8384e63604 , < dcaa738afde55085ac6056252e319479cf23cde2 (git)
Affected: 76f1df88bbc2f984eb0418cc90de0a8384e63604 , < 01a853faaeaf3379ccf358ade582b1d28752126e (git)
Affected: 76f1df88bbc2f984eb0418cc90de0a8384e63604 , < e8b8344de3980709080d86c157d24e7de07d70ad (git)
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Linux Linux Affected: 5.17
Unaffected: 0 , < 5.17 (semver)
Unaffected: 6.1.130 , ≤ 6.1.* (semver)
Unaffected: 6.6.64 , ≤ 6.6.* (semver)
Unaffected: 6.11.11 , ≤ 6.11.* (semver)
Unaffected: 6.12.2 , ≤ 6.12.* (semver)
Unaffected: 6.13 , ≤ * (original_commit_for_fix)
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Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP Affected: V3.1.5 , < * (custom)
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Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP Affected: V3.1.5 , < * (custom)
Create a notification for this product.
Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP Affected: V3.1.5 , < * (custom)
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nblock, bfq: fix bfqq uaf in bfq_limit_depth()\n\nSet new allocated bfqq to bic or remove freed bfqq from bic are both\nprotected by bfqd-\u003elock, however bfq_limit_depth() is deferencing bfqq\nfrom bic without the lock, this can lead to UAF if the io_context is\nshared by multiple tasks.\n\nFor example, test bfq with io_uring can trigger following UAF in v6.6:\n\n==================================================================\nBUG: KASAN: slab-use-after-free in bfqq_group+0x15/0x50\n\nCall Trace:\n \u003cTASK\u003e\n dump_stack_lvl+0x47/0x80\n print_address_description.constprop.0+0x66/0x300\n print_report+0x3e/0x70\n kasan_report+0xb4/0xf0\n bfqq_group+0x15/0x50\n bfqq_request_over_limit+0x130/0x9a0\n bfq_limit_depth+0x1b5/0x480\n __blk_mq_alloc_requests+0x2b5/0xa00\n blk_mq_get_new_requests+0x11d/0x1d0\n blk_mq_submit_bio+0x286/0xb00\n submit_bio_noacct_nocheck+0x331/0x400\n __block_write_full_folio+0x3d0/0x640\n writepage_cb+0x3b/0xc0\n write_cache_pages+0x254/0x6c0\n write_cache_pages+0x254/0x6c0\n do_writepages+0x192/0x310\n filemap_fdatawrite_wbc+0x95/0xc0\n __filemap_fdatawrite_range+0x99/0xd0\n filemap_write_and_wait_range.part.0+0x4d/0xa0\n blkdev_read_iter+0xef/0x1e0\n io_read+0x1b6/0x8a0\n io_issue_sqe+0x87/0x300\n io_wq_submit_work+0xeb/0x390\n io_worker_handle_work+0x24d/0x550\n io_wq_worker+0x27f/0x6c0\n ret_from_fork_asm+0x1b/0x30\n \u003c/TASK\u003e\n\nAllocated by task 808602:\n kasan_save_stack+0x1e/0x40\n kasan_set_track+0x21/0x30\n __kasan_slab_alloc+0x83/0x90\n kmem_cache_alloc_node+0x1b1/0x6d0\n bfq_get_queue+0x138/0xfa0\n bfq_get_bfqq_handle_split+0xe3/0x2c0\n bfq_init_rq+0x196/0xbb0\n bfq_insert_request.isra.0+0xb5/0x480\n bfq_insert_requests+0x156/0x180\n blk_mq_insert_request+0x15d/0x440\n blk_mq_submit_bio+0x8a4/0xb00\n submit_bio_noacct_nocheck+0x331/0x400\n __blkdev_direct_IO_async+0x2dd/0x330\n blkdev_write_iter+0x39a/0x450\n io_write+0x22a/0x840\n io_issue_sqe+0x87/0x300\n io_wq_submit_work+0xeb/0x390\n io_worker_handle_work+0x24d/0x550\n io_wq_worker+0x27f/0x6c0\n ret_from_fork+0x2d/0x50\n ret_from_fork_asm+0x1b/0x30\n\nFreed by task 808589:\n kasan_save_stack+0x1e/0x40\n kasan_set_track+0x21/0x30\n kasan_save_free_info+0x27/0x40\n __kasan_slab_free+0x126/0x1b0\n kmem_cache_free+0x10c/0x750\n bfq_put_queue+0x2dd/0x770\n __bfq_insert_request.isra.0+0x155/0x7a0\n bfq_insert_request.isra.0+0x122/0x480\n bfq_insert_requests+0x156/0x180\n blk_mq_dispatch_plug_list+0x528/0x7e0\n blk_mq_flush_plug_list.part.0+0xe5/0x590\n __blk_flush_plug+0x3b/0x90\n blk_finish_plug+0x40/0x60\n do_writepages+0x19d/0x310\n filemap_fdatawrite_wbc+0x95/0xc0\n __filemap_fdatawrite_range+0x99/0xd0\n filemap_write_and_wait_range.part.0+0x4d/0xa0\n blkdev_read_iter+0xef/0x1e0\n io_read+0x1b6/0x8a0\n io_issue_sqe+0x87/0x300\n io_wq_submit_work+0xeb/0x390\n io_worker_handle_work+0x24d/0x550\n io_wq_worker+0x27f/0x6c0\n ret_from_fork+0x2d/0x50\n ret_from_fork_asm+0x1b/0x30\n\nFix the problem by protecting bic_to_bfqq() with bfqd-\u003elock."
        }
      ],
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        "dateUpdated": "2026-05-11T20:52:07.233Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/ada4ca5fd5a9d5212f28164d49a4885951c979c9"
        },
        {
          "url": "https://git.kernel.org/stable/c/906cdbdd3b018ff69cc830173bce277a847d4fdc"
        },
        {
          "url": "https://git.kernel.org/stable/c/dcaa738afde55085ac6056252e319479cf23cde2"
        },
        {
          "url": "https://git.kernel.org/stable/c/01a853faaeaf3379ccf358ade582b1d28752126e"
        },
        {
          "url": "https://git.kernel.org/stable/c/e8b8344de3980709080d86c157d24e7de07d70ad"
        }
      ],
      "title": "block, bfq: fix bfqq uaf in bfq_limit_depth()",
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        "engine": "bippy-1.2.0"
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    },
    "fkie_nvd": {
      "descriptions": "[{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nblock, bfq: fix bfqq uaf in bfq_limit_depth()\\n\\nSet new allocated bfqq to bic or remove freed bfqq from bic are both\\nprotected by bfqd-\u003elock, however bfq_limit_depth() is deferencing bfqq\\nfrom bic without the lock, this can lead to UAF if the io_context is\\nshared by multiple tasks.\\n\\nFor example, test bfq with io_uring can trigger following UAF in v6.6:\\n\\n==================================================================\\nBUG: KASAN: slab-use-after-free in bfqq_group+0x15/0x50\\n\\nCall Trace:\\n \u003cTASK\u003e\\n dump_stack_lvl+0x47/0x80\\n print_address_description.constprop.0+0x66/0x300\\n print_report+0x3e/0x70\\n kasan_report+0xb4/0xf0\\n bfqq_group+0x15/0x50\\n bfqq_request_over_limit+0x130/0x9a0\\n bfq_limit_depth+0x1b5/0x480\\n __blk_mq_alloc_requests+0x2b5/0xa00\\n blk_mq_get_new_requests+0x11d/0x1d0\\n blk_mq_submit_bio+0x286/0xb00\\n submit_bio_noacct_nocheck+0x331/0x400\\n __block_write_full_folio+0x3d0/0x640\\n writepage_cb+0x3b/0xc0\\n write_cache_pages+0x254/0x6c0\\n write_cache_pages+0x254/0x6c0\\n do_writepages+0x192/0x310\\n filemap_fdatawrite_wbc+0x95/0xc0\\n __filemap_fdatawrite_range+0x99/0xd0\\n filemap_write_and_wait_range.part.0+0x4d/0xa0\\n blkdev_read_iter+0xef/0x1e0\\n io_read+0x1b6/0x8a0\\n io_issue_sqe+0x87/0x300\\n io_wq_submit_work+0xeb/0x390\\n io_worker_handle_work+0x24d/0x550\\n io_wq_worker+0x27f/0x6c0\\n ret_from_fork_asm+0x1b/0x30\\n \u003c/TASK\u003e\\n\\nAllocated by task 808602:\\n kasan_save_stack+0x1e/0x40\\n kasan_set_track+0x21/0x30\\n __kasan_slab_alloc+0x83/0x90\\n kmem_cache_alloc_node+0x1b1/0x6d0\\n bfq_get_queue+0x138/0xfa0\\n bfq_get_bfqq_handle_split+0xe3/0x2c0\\n bfq_init_rq+0x196/0xbb0\\n bfq_insert_request.isra.0+0xb5/0x480\\n bfq_insert_requests+0x156/0x180\\n blk_mq_insert_request+0x15d/0x440\\n blk_mq_submit_bio+0x8a4/0xb00\\n submit_bio_noacct_nocheck+0x331/0x400\\n __blkdev_direct_IO_async+0x2dd/0x330\\n blkdev_write_iter+0x39a/0x450\\n io_write+0x22a/0x840\\n io_issue_sqe+0x87/0x300\\n io_wq_submit_work+0xeb/0x390\\n io_worker_handle_work+0x24d/0x550\\n io_wq_worker+0x27f/0x6c0\\n ret_from_fork+0x2d/0x50\\n ret_from_fork_asm+0x1b/0x30\\n\\nFreed by task 808589:\\n kasan_save_stack+0x1e/0x40\\n kasan_set_track+0x21/0x30\\n kasan_save_free_info+0x27/0x40\\n __kasan_slab_free+0x126/0x1b0\\n kmem_cache_free+0x10c/0x750\\n bfq_put_queue+0x2dd/0x770\\n __bfq_insert_request.isra.0+0x155/0x7a0\\n bfq_insert_request.isra.0+0x122/0x480\\n bfq_insert_requests+0x156/0x180\\n blk_mq_dispatch_plug_list+0x528/0x7e0\\n blk_mq_flush_plug_list.part.0+0xe5/0x590\\n __blk_flush_plug+0x3b/0x90\\n blk_finish_plug+0x40/0x60\\n do_writepages+0x19d/0x310\\n filemap_fdatawrite_wbc+0x95/0xc0\\n __filemap_fdatawrite_range+0x99/0xd0\\n filemap_write_and_wait_range.part.0+0x4d/0xa0\\n blkdev_read_iter+0xef/0x1e0\\n io_read+0x1b6/0x8a0\\n io_issue_sqe+0x87/0x300\\n io_wq_submit_work+0xeb/0x390\\n io_worker_handle_work+0x24d/0x550\\n io_wq_worker+0x27f/0x6c0\\n ret_from_fork+0x2d/0x50\\n ret_from_fork_asm+0x1b/0x30\\n\\nFix the problem by protecting bic_to_bfqq() with bfqd-\u003elock.\"}, {\"lang\": \"es\", \"value\": \"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: block, bfq: reparar bfqq uaf en bfq_limit_depth() Establecer un nuevo bfqq asignado a bic o eliminar un bfqq liberado de bic est\\u00e1n ambos protegidos por bfqd-\u0026gt;lock, sin embargo bfq_limit_depth() est\\u00e1 diferenciando bfqq de bic sin el bloqueo, esto puede llevar a UAF si el io_context es compartido por m\\u00faltiples tareas. Por ejemplo, la prueba bfq con io_uring puede activar el siguiente UAF en v6.6: ====================================================================== ERROR: KASAN: slab-use-after-free en bfqq_group+0x15/0x50 Seguimiento de llamadas:  dump_stack_lvl+0x47/0x80 print_address_description.constprop.0+0x66/0x300 print_report+0x3e/0x70 kasan_report+0xb4/0xf0 bfqq_group+0x15/0x50 bfqq_request_over_limit+0x130/0x9a0 bfq_limit_depth+0x1b5/0x480 __blk_mq_alloc_requests+0x2b5/0xa00 blk_mq_get_new_requests+0x11d/0x1d0 blk_mq_submit_bio+0x286/0xb00 send_bio_noacct_nocheck+0x331/0x400 __block_write_full_folio+0x3d0/0x640 writepage_cb+0x3b/0xc0 write_cache_pages+0x254/0x6c0 write_cache_pages+0x254/0x6c0 do_writepages+0x192/0x310 filemap_fdatawrite_wbc+0x95/0xc0 __filemap_fdatawrite_range+0x99/0xd0 Asignado por la tarea 808602: kasan_save_stack+0x1e/0x40 kasan_set_track+0x21/0x30 __kasan_slab_alloc+0x83/0x90 kmem_cache_alloc_node+0x1b1/0x6d0 bfq_get_queue+0x138/0xfa0 bfq_get_bfqq_handle_split+0xe3/0x2c0 bfq_init_rq+0x196/0xbb0 bfq_insert_request.isra.0+0xb5/0x480 bfq_insert_requests+0x156/0x180 blk_mq_insert_request+0x15d/0x440 blk_mq_submit_bio+0x8a4/0xb00 send_bio_noacct_nocheck+0x331/0x400 __blkdev_direct_IO_async+0x2dd/0x330 blkdev_write_iter+0x39a/0x450 io_write+0x22a/0x840 io_issue_sqe+0x87/0x300 io_wq_submit_work+0xeb/0x390 io_worker_handle_work+0x24d/0x550 io_wq_worker+0x27f/0x6c0 ret_from_fork+0x2d/0x50 ret_from_fork_asm+0x1b/0x30 Liberado por la tarea 808589: kasan_save_stack+0x1e/0x40 kasan_set_track+0x21/0x30 kasan_save_free_info+0x27/0x40 __kasan_slab_free+0x126/0x1b0 kmem_cache_free+0x10c/0x750 bfq_put_queue+0x2dd/0x770 __bfq_insert_request.isra.0+0x155/0x7a0 bfq_insert_request.isra.0+0x122/0x480 bfq_insert_requests+0x156/0x180 blk_mq_dispatch_plug_list+0x528/0x7e0 blk_mq_flush_plug_list.part.0+0xe5/0x590 __blk_flush_plug+0x3b/0x90 blk_finish_plug+0x40/0x60 do_writepages+0x19d/0x310 filemap_fdatawrite_wbc+0x95/0xc0 Solucione el problema protegiendo bic_to_bfqq() con bfqd-\u0026gt;lock.\"}]",
      "id": "CVE-2024-53166",
      "lastModified": "2024-12-27T14:15:23.703",
      "published": "2024-12-27T14:15:23.703",
      "references": "[{\"url\": \"https://git.kernel.org/stable/c/01a853faaeaf3379ccf358ade582b1d28752126e\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}, {\"url\": \"https://git.kernel.org/stable/c/906cdbdd3b018ff69cc830173bce277a847d4fdc\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}, {\"url\": \"https://git.kernel.org/stable/c/dcaa738afde55085ac6056252e319479cf23cde2\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}, {\"url\": \"https://git.kernel.org/stable/c/e8b8344de3980709080d86c157d24e7de07d70ad\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]",
      "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "vulnStatus": "Awaiting Analysis"
    },
    "microsoft_vex": {
      "current_release_date": "2026-02-18T01:51:43.000Z",
      "cve": "CVE-2024-53166",
      "id": "msrc_CVE-2024-53166",
      "initial_release_date": "2024-12-02T00:00:00.000Z",
      "product_status:fixed": "2",
      "product_status:known_affected": "2",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "block, bfq: fix bfqq uaf in bfq_limit_depth()",
      "url": "https://msrc.microsoft.com/csaf/vex/2024/msrc_cve-2024-53166.json",
      "version": "2"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2024-53166\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-12-27T14:15:23.703\",\"lastModified\":\"2026-06-17T08:08:28.110\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nblock, bfq: fix bfqq uaf in bfq_limit_depth()\\n\\nSet new allocated bfqq to bic or remove freed bfqq from bic are both\\nprotected by bfqd-\u003elock, however bfq_limit_depth() is deferencing bfqq\\nfrom bic without the lock, this can lead to UAF if the io_context is\\nshared by multiple tasks.\\n\\nFor example, test bfq with io_uring can trigger following UAF in v6.6:\\n\\n==================================================================\\nBUG: KASAN: slab-use-after-free in bfqq_group+0x15/0x50\\n\\nCall Trace:\\n \u003cTASK\u003e\\n dump_stack_lvl+0x47/0x80\\n print_address_description.constprop.0+0x66/0x300\\n print_report+0x3e/0x70\\n kasan_report+0xb4/0xf0\\n bfqq_group+0x15/0x50\\n bfqq_request_over_limit+0x130/0x9a0\\n bfq_limit_depth+0x1b5/0x480\\n __blk_mq_alloc_requests+0x2b5/0xa00\\n blk_mq_get_new_requests+0x11d/0x1d0\\n blk_mq_submit_bio+0x286/0xb00\\n submit_bio_noacct_nocheck+0x331/0x400\\n __block_write_full_folio+0x3d0/0x640\\n writepage_cb+0x3b/0xc0\\n write_cache_pages+0x254/0x6c0\\n write_cache_pages+0x254/0x6c0\\n do_writepages+0x192/0x310\\n filemap_fdatawrite_wbc+0x95/0xc0\\n __filemap_fdatawrite_range+0x99/0xd0\\n filemap_write_and_wait_range.part.0+0x4d/0xa0\\n blkdev_read_iter+0xef/0x1e0\\n io_read+0x1b6/0x8a0\\n io_issue_sqe+0x87/0x300\\n io_wq_submit_work+0xeb/0x390\\n io_worker_handle_work+0x24d/0x550\\n io_wq_worker+0x27f/0x6c0\\n ret_from_fork_asm+0x1b/0x30\\n \u003c/TASK\u003e\\n\\nAllocated by task 808602:\\n kasan_save_stack+0x1e/0x40\\n kasan_set_track+0x21/0x30\\n __kasan_slab_alloc+0x83/0x90\\n kmem_cache_alloc_node+0x1b1/0x6d0\\n bfq_get_queue+0x138/0xfa0\\n bfq_get_bfqq_handle_split+0xe3/0x2c0\\n bfq_init_rq+0x196/0xbb0\\n bfq_insert_request.isra.0+0xb5/0x480\\n bfq_insert_requests+0x156/0x180\\n blk_mq_insert_request+0x15d/0x440\\n blk_mq_submit_bio+0x8a4/0xb00\\n submit_bio_noacct_nocheck+0x331/0x400\\n __blkdev_direct_IO_async+0x2dd/0x330\\n blkdev_write_iter+0x39a/0x450\\n io_write+0x22a/0x840\\n io_issue_sqe+0x87/0x300\\n io_wq_submit_work+0xeb/0x390\\n io_worker_handle_work+0x24d/0x550\\n io_wq_worker+0x27f/0x6c0\\n ret_from_fork+0x2d/0x50\\n ret_from_fork_asm+0x1b/0x30\\n\\nFreed by task 808589:\\n kasan_save_stack+0x1e/0x40\\n kasan_set_track+0x21/0x30\\n kasan_save_free_info+0x27/0x40\\n __kasan_slab_free+0x126/0x1b0\\n kmem_cache_free+0x10c/0x750\\n bfq_put_queue+0x2dd/0x770\\n __bfq_insert_request.isra.0+0x155/0x7a0\\n bfq_insert_request.isra.0+0x122/0x480\\n bfq_insert_requests+0x156/0x180\\n blk_mq_dispatch_plug_list+0x528/0x7e0\\n blk_mq_flush_plug_list.part.0+0xe5/0x590\\n __blk_flush_plug+0x3b/0x90\\n blk_finish_plug+0x40/0x60\\n do_writepages+0x19d/0x310\\n filemap_fdatawrite_wbc+0x95/0xc0\\n __filemap_fdatawrite_range+0x99/0xd0\\n filemap_write_and_wait_range.part.0+0x4d/0xa0\\n blkdev_read_iter+0xef/0x1e0\\n io_read+0x1b6/0x8a0\\n io_issue_sqe+0x87/0x300\\n io_wq_submit_work+0xeb/0x390\\n io_worker_handle_work+0x24d/0x550\\n io_wq_worker+0x27f/0x6c0\\n ret_from_fork+0x2d/0x50\\n ret_from_fork_asm+0x1b/0x30\\n\\nFix the problem by protecting bic_to_bfqq() with bfqd-\u003elock.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: block, bfq: reparar bfqq uaf en bfq_limit_depth() Establecer un nuevo bfqq asignado a bic o eliminar un bfqq liberado de bic est\u00e1n ambos protegidos por bfqd-\u0026gt;lock, sin embargo bfq_limit_depth() est\u00e1 diferenciando bfqq de bic sin el bloqueo, esto puede llevar a UAF si el io_context es compartido por m\u00faltiples tareas. Por ejemplo, la prueba bfq con io_uring puede activar el siguiente UAF en v6.6: ====================================================================== ERROR: KASAN: slab-use-after-free en bfqq_group+0x15/0x50 Seguimiento de llamadas:  dump_stack_lvl+0x47/0x80 print_address_description.constprop.0+0x66/0x300 print_report+0x3e/0x70 kasan_report+0xb4/0xf0 bfqq_group+0x15/0x50 bfqq_request_over_limit+0x130/0x9a0 bfq_limit_depth+0x1b5/0x480 __blk_mq_alloc_requests+0x2b5/0xa00 blk_mq_get_new_requests+0x11d/0x1d0 blk_mq_submit_bio+0x286/0xb00 send_bio_noacct_nocheck+0x331/0x400 __block_write_full_folio+0x3d0/0x640 writepage_cb+0x3b/0xc0 write_cache_pages+0x254/0x6c0 write_cache_pages+0x254/0x6c0 do_writepages+0x192/0x310 filemap_fdatawrite_wbc+0x95/0xc0 __filemap_fdatawrite_range+0x99/0xd0 Asignado por la tarea 808602: kasan_save_stack+0x1e/0x40 kasan_set_track+0x21/0x30 __kasan_slab_alloc+0x83/0x90 kmem_cache_alloc_node+0x1b1/0x6d0 bfq_get_queue+0x138/0xfa0 bfq_get_bfqq_handle_split+0xe3/0x2c0 bfq_init_rq+0x196/0xbb0 bfq_insert_request.isra.0+0xb5/0x480 bfq_insert_requests+0x156/0x180 blk_mq_insert_request+0x15d/0x440 blk_mq_submit_bio+0x8a4/0xb00 send_bio_noacct_nocheck+0x331/0x400 __blkdev_direct_IO_async+0x2dd/0x330 blkdev_write_iter+0x39a/0x450 io_write+0x22a/0x840 io_issue_sqe+0x87/0x300 io_wq_submit_work+0xeb/0x390 io_worker_handle_work+0x24d/0x550 io_wq_worker+0x27f/0x6c0 ret_from_fork+0x2d/0x50 ret_from_fork_asm+0x1b/0x30 Liberado por la tarea 808589: kasan_save_stack+0x1e/0x40 kasan_set_track+0x21/0x30 kasan_save_free_info+0x27/0x40 __kasan_slab_free+0x126/0x1b0 kmem_cache_free+0x10c/0x750 bfq_put_queue+0x2dd/0x770 __bfq_insert_request.isra.0+0x155/0x7a0 bfq_insert_request.isra.0+0x122/0x480 bfq_insert_requests+0x156/0x180 blk_mq_dispatch_plug_list+0x528/0x7e0 blk_mq_flush_plug_list.part.0+0xe5/0x590 __blk_flush_plug+0x3b/0x90 blk_finish_plug+0x40/0x60 do_writepages+0x19d/0x310 filemap_fdatawrite_wbc+0x95/0xc0 Solucione el problema protegiendo bic_to_bfqq() con bfqd-\u0026gt;lock.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"block/bfq-iosched.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"76f1df88bbc2f984eb0418cc90de0a8384e63604\",\"lessThan\":\"ada4ca5fd5a9d5212f28164d49a4885951c979c9\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"76f1df88bbc2f984eb0418cc90de0a8384e63604\",\"lessThan\":\"906cdbdd3b018ff69cc830173bce277a847d4fdc\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"76f1df88bbc2f984eb0418cc90de0a8384e63604\",\"lessThan\":\"dcaa738afde55085ac6056252e319479cf23cde2\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"76f1df88bbc2f984eb0418cc90de0a8384e63604\",\"lessThan\":\"01a853faaeaf3379ccf358ade582b1d28752126e\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"76f1df88bbc2f984eb0418cc90de0a8384e63604\",\"lessThan\":\"e8b8344de3980709080d86c157d24e7de07d70ad\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"block/bfq-iosched.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"5.17\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"5.17\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.130\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.64\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.11.11\",\"lessThanOrEqual\":\"6.11.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.2\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.13\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]},{\"source\":\"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e\",\"affectedData\":[{\"vendor\":\"Siemens\",\"product\":\"SIMATIC S7-1500 CPU 1518-4 PN/DP MFP\",\"defaultStatus\":\"unknown\",\"versions\":[{\"version\":\"V3.1.5\",\"lessThan\":\"*\",\"versionType\":\"custom\",\"status\":\"affected\"}]},{\"vendor\":\"Siemens\",\"product\":\"SIMATIC S7-1500 CPU 1518-4 PN/DP MFP\",\"defaultStatus\":\"unknown\",\"versions\":[{\"version\":\"V3.1.5\",\"lessThan\":\"*\",\"versionType\":\"custom\",\"status\":\"affected\"}]},{\"vendor\":\"Siemens\",\"product\":\"SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP\",\"defaultStatus\":\"unknown\",\"versions\":[{\"version\":\"V3.1.5\",\"lessThan\":\"*\",\"versionType\":\"custom\",\"status\":\"affected\"}]},{\"vendor\":\"Siemens\",\"product\":\"SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP\",\"defaultStatus\":\"unknown\",\"versions\":[{\"version\":\"V3.1.5\",\"lessThan\":\"*\",\"versionType\":\"custom\",\"status\":\"affected\"}]},{\"vendor\":\"Siemens\",\"product\":\"SIPLUS S7-1500 CPU 1518-4 PN/DP MFP\",\"defaultStatus\":\"unknown\",\"versions\":[{\"version\":\"V3.1.5\",\"lessThan\":\"*\",\"versionType\":\"custom\",\"status\":\"affected\"}]}]}],\"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:H/I:H/A:H\",\"baseScore\":7.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9},{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":7.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2025-02-10T17:13:21.417315Z\",\"id\":\"CVE-2024-53166\",\"options\":[{\"exploitation\":\"none\"},{\"automatable\":\"no\"},{\"technicalImpact\":\"total\"}],\"role\":\"CISA 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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-06-28T08:15:07+00:00",
      "cve": "CVE-2024-53166",
      "id": "CVE-2024-53166",
      "initial_release_date": "2024-12-27T00:00:00+00:00",
      "product_status:fixed": "305",
      "product_status:known_affected": "22",
      "product_status:known_not_affected": "90",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: block, bfq: fix bfqq uaf in bfq_limit_depth()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2024/cve-2024-53166.json",
      "version": "3"
    },
    "vulnrichment": {
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\"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\", \"integrityImpact\": \"HIGH\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"LOW\", \"confidentialityImpact\": \"HIGH\"}}, {\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2024-53166\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"total\"}], \"version\": \"2.0.3\", \"timestamp\": \"2025-02-10T17:13:21.417315Z\"}}}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-416\", \"description\": \"CWE-416 Use After Free\"}]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2025-02-10T17:13:22.819Z\"}}], \"cna\": {\"title\": \"block, bfq: fix bfqq uaf in bfq_limit_depth()\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"76f1df88bbc2f984eb0418cc90de0a8384e63604\", \"lessThan\": \"ada4ca5fd5a9d5212f28164d49a4885951c979c9\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"76f1df88bbc2f984eb0418cc90de0a8384e63604\", \"lessThan\": \"906cdbdd3b018ff69cc830173bce277a847d4fdc\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"76f1df88bbc2f984eb0418cc90de0a8384e63604\", \"lessThan\": \"dcaa738afde55085ac6056252e319479cf23cde2\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"76f1df88bbc2f984eb0418cc90de0a8384e63604\", \"lessThan\": \"01a853faaeaf3379ccf358ade582b1d28752126e\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"76f1df88bbc2f984eb0418cc90de0a8384e63604\", \"lessThan\": \"e8b8344de3980709080d86c157d24e7de07d70ad\", \"versionType\": \"git\"}], 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[\"block/bfq-iosched.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/ada4ca5fd5a9d5212f28164d49a4885951c979c9\"}, {\"url\": \"https://git.kernel.org/stable/c/906cdbdd3b018ff69cc830173bce277a847d4fdc\"}, {\"url\": \"https://git.kernel.org/stable/c/dcaa738afde55085ac6056252e319479cf23cde2\"}, {\"url\": \"https://git.kernel.org/stable/c/01a853faaeaf3379ccf358ade582b1d28752126e\"}, {\"url\": \"https://git.kernel.org/stable/c/e8b8344de3980709080d86c157d24e7de07d70ad\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nblock, bfq: fix bfqq uaf in bfq_limit_depth()\\n\\nSet new allocated bfqq to bic or remove freed bfqq from bic are both\\nprotected by bfqd-\u003elock, however bfq_limit_depth() is deferencing bfqq\\nfrom bic without the lock, this can lead to UAF if the io_context is\\nshared by multiple tasks.\\n\\nFor example, test bfq with io_uring can trigger following UAF in v6.6:\\n\\n==================================================================\\nBUG: KASAN: slab-use-after-free in bfqq_group+0x15/0x50\\n\\nCall Trace:\\n \u003cTASK\u003e\\n dump_stack_lvl+0x47/0x80\\n print_address_description.constprop.0+0x66/0x300\\n print_report+0x3e/0x70\\n kasan_report+0xb4/0xf0\\n bfqq_group+0x15/0x50\\n bfqq_request_over_limit+0x130/0x9a0\\n bfq_limit_depth+0x1b5/0x480\\n __blk_mq_alloc_requests+0x2b5/0xa00\\n blk_mq_get_new_requests+0x11d/0x1d0\\n blk_mq_submit_bio+0x286/0xb00\\n submit_bio_noacct_nocheck+0x331/0x400\\n __block_write_full_folio+0x3d0/0x640\\n writepage_cb+0x3b/0xc0\\n write_cache_pages+0x254/0x6c0\\n write_cache_pages+0x254/0x6c0\\n do_writepages+0x192/0x310\\n filemap_fdatawrite_wbc+0x95/0xc0\\n __filemap_fdatawrite_range+0x99/0xd0\\n filemap_write_and_wait_range.part.0+0x4d/0xa0\\n blkdev_read_iter+0xef/0x1e0\\n io_read+0x1b6/0x8a0\\n io_issue_sqe+0x87/0x300\\n io_wq_submit_work+0xeb/0x390\\n io_worker_handle_work+0x24d/0x550\\n io_wq_worker+0x27f/0x6c0\\n ret_from_fork_asm+0x1b/0x30\\n \u003c/TASK\u003e\\n\\nAllocated by task 808602:\\n kasan_save_stack+0x1e/0x40\\n kasan_set_track+0x21/0x30\\n __kasan_slab_alloc+0x83/0x90\\n kmem_cache_alloc_node+0x1b1/0x6d0\\n bfq_get_queue+0x138/0xfa0\\n bfq_get_bfqq_handle_split+0xe3/0x2c0\\n bfq_init_rq+0x196/0xbb0\\n bfq_insert_request.isra.0+0xb5/0x480\\n bfq_insert_requests+0x156/0x180\\n blk_mq_insert_request+0x15d/0x440\\n blk_mq_submit_bio+0x8a4/0xb00\\n submit_bio_noacct_nocheck+0x331/0x400\\n __blkdev_direct_IO_async+0x2dd/0x330\\n blkdev_write_iter+0x39a/0x450\\n io_write+0x22a/0x840\\n io_issue_sqe+0x87/0x300\\n io_wq_submit_work+0xeb/0x390\\n io_worker_handle_work+0x24d/0x550\\n io_wq_worker+0x27f/0x6c0\\n ret_from_fork+0x2d/0x50\\n ret_from_fork_asm+0x1b/0x30\\n\\nFreed by task 808589:\\n kasan_save_stack+0x1e/0x40\\n kasan_set_track+0x21/0x30\\n kasan_save_free_info+0x27/0x40\\n __kasan_slab_free+0x126/0x1b0\\n kmem_cache_free+0x10c/0x750\\n bfq_put_queue+0x2dd/0x770\\n __bfq_insert_request.isra.0+0x155/0x7a0\\n bfq_insert_request.isra.0+0x122/0x480\\n bfq_insert_requests+0x156/0x180\\n blk_mq_dispatch_plug_list+0x528/0x7e0\\n blk_mq_flush_plug_list.part.0+0xe5/0x590\\n __blk_flush_plug+0x3b/0x90\\n blk_finish_plug+0x40/0x60\\n do_writepages+0x19d/0x310\\n filemap_fdatawrite_wbc+0x95/0xc0\\n __filemap_fdatawrite_range+0x99/0xd0\\n filemap_write_and_wait_range.part.0+0x4d/0xa0\\n blkdev_read_iter+0xef/0x1e0\\n io_read+0x1b6/0x8a0\\n io_issue_sqe+0x87/0x300\\n io_wq_submit_work+0xeb/0x390\\n io_worker_handle_work+0x24d/0x550\\n io_wq_worker+0x27f/0x6c0\\n ret_from_fork+0x2d/0x50\\n ret_from_fork_asm+0x1b/0x30\\n\\nFix the problem by protecting bic_to_bfqq() with bfqd-\u003elock.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.130\", \"versionStartIncluding\": \"5.17\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.64\", \"versionStartIncluding\": \"5.17\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.11.11\", \"versionStartIncluding\": \"5.17\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.12.2\", \"versionStartIncluding\": \"5.17\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.13\", \"versionStartIncluding\": \"5.17\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-05-11T20:52:07.233Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-53166\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-07-14T12:38:32.857Z\", \"dateReserved\": \"2024-11-19T17:17:25.005Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-12-27T13:49:12.233Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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

Sightings

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Nomenclature

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


Detection rules are retrieved from Rulezet.