Vulnerability-Lookup

FKIE_CVE-2025-71117

Vulnerability from fkie_nvd - Published: 2026-01-14 15:16 - Updated: 2026-03-25 18:58

Severity ?

5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Summary

In the Linux kernel, the following vulnerability has been resolved: block: Remove queue freezing from several sysfs store callbacks Freezing the request queue from inside sysfs store callbacks may cause a deadlock in combination with the dm-multipath driver and the queue_if_no_path option. Additionally, freezing the request queue slows down system boot on systems where sysfs attributes are set synchronously. Fix this by removing the blk_mq_freeze_queue() / blk_mq_unfreeze_queue() calls from the store callbacks that do not strictly need these callbacks. Add the __data_racy annotation to request_queue.rq_timeout to suppress KCSAN data race reports about the rq_timeout reads. This patch may cause a small delay in applying the new settings. For all the attributes affected by this patch, I/O will complete correctly whether the old or the new value of the attribute is used. This patch affects the following sysfs attributes: * io_poll_delay * io_timeout * nomerges * read_ahead_kb * rq_affinity Here is an example of a deadlock triggered by running test srp/002 if this patch is not applied: task:multipathd Call Trace: <TASK> __schedule+0x8c1/0x1bf0 schedule+0xdd/0x270 schedule_preempt_disabled+0x1c/0x30 __mutex_lock+0xb89/0x1650 mutex_lock_nested+0x1f/0x30 dm_table_set_restrictions+0x823/0xdf0 __bind+0x166/0x590 dm_swap_table+0x2a7/0x490 do_resume+0x1b1/0x610 dev_suspend+0x55/0x1a0 ctl_ioctl+0x3a5/0x7e0 dm_ctl_ioctl+0x12/0x20 __x64_sys_ioctl+0x127/0x1a0 x64_sys_call+0xe2b/0x17d0 do_syscall_64+0x96/0x3a0 entry_SYSCALL_64_after_hwframe+0x4b/0x53 </TASK> task:(udev-worker) Call Trace: <TASK> __schedule+0x8c1/0x1bf0 schedule+0xdd/0x270 blk_mq_freeze_queue_wait+0xf2/0x140 blk_mq_freeze_queue_nomemsave+0x23/0x30 queue_ra_store+0x14e/0x290 queue_attr_store+0x23e/0x2c0 sysfs_kf_write+0xde/0x140 kernfs_fop_write_iter+0x3b2/0x630 vfs_write+0x4fd/0x1390 ksys_write+0xfd/0x230 __x64_sys_write+0x76/0xc0 x64_sys_call+0x276/0x17d0 do_syscall_64+0x96/0x3a0 entry_SYSCALL_64_after_hwframe+0x4b/0x53 </TASK>

References

	URL	Tags
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/3997b3147c7b68b0308378fa95a766015f8ceb1c	Patch
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/935a20d1bebf6236076785fac3ff81e3931834e9	Patch

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	6.11
linux	linux_kernel	6.19
linux	linux_kernel	6.19
linux	linux_kernel	6.19
linux	linux_kernel	6.19
linux	linux_kernel	6.19
linux	linux_kernel	6.19
linux	linux_kernel	6.19
linux	linux_kernel	6.19

JSON

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      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nblock: Remove queue freezing from several sysfs store callbacks\n\nFreezing the request queue from inside sysfs store callbacks may cause a\ndeadlock in combination with the dm-multipath driver and the\nqueue_if_no_path option. Additionally, freezing the request queue slows\ndown system boot on systems where sysfs attributes are set synchronously.\n\nFix this by removing the blk_mq_freeze_queue() / blk_mq_unfreeze_queue()\ncalls from the store callbacks that do not strictly need these callbacks.\nAdd the __data_racy annotation to request_queue.rq_timeout to suppress\nKCSAN data race reports about the rq_timeout reads.\n\nThis patch may cause a small delay in applying the new settings.\n\nFor all the attributes affected by this patch, I/O will complete\ncorrectly whether the old or the new value of the attribute is used.\n\nThis patch affects the following sysfs attributes:\n* io_poll_delay\n* io_timeout\n* nomerges\n* read_ahead_kb\n* rq_affinity\n\nHere is an example of a deadlock triggered by running test srp/002\nif this patch is not applied:\n\ntask:multipathd\nCall Trace:\n \u003cTASK\u003e\n __schedule+0x8c1/0x1bf0\n schedule+0xdd/0x270\n schedule_preempt_disabled+0x1c/0x30\n __mutex_lock+0xb89/0x1650\n mutex_lock_nested+0x1f/0x30\n dm_table_set_restrictions+0x823/0xdf0\n __bind+0x166/0x590\n dm_swap_table+0x2a7/0x490\n do_resume+0x1b1/0x610\n dev_suspend+0x55/0x1a0\n ctl_ioctl+0x3a5/0x7e0\n dm_ctl_ioctl+0x12/0x20\n __x64_sys_ioctl+0x127/0x1a0\n x64_sys_call+0xe2b/0x17d0\n do_syscall_64+0x96/0x3a0\n entry_SYSCALL_64_after_hwframe+0x4b/0x53\n \u003c/TASK\u003e\ntask:(udev-worker)\nCall Trace:\n \u003cTASK\u003e\n __schedule+0x8c1/0x1bf0\n schedule+0xdd/0x270\n blk_mq_freeze_queue_wait+0xf2/0x140\n blk_mq_freeze_queue_nomemsave+0x23/0x30\n queue_ra_store+0x14e/0x290\n queue_attr_store+0x23e/0x2c0\n sysfs_kf_write+0xde/0x140\n kernfs_fop_write_iter+0x3b2/0x630\n vfs_write+0x4fd/0x1390\n ksys_write+0xfd/0x230\n __x64_sys_write+0x76/0xc0\n x64_sys_call+0x276/0x17d0\n do_syscall_64+0x96/0x3a0\n entry_SYSCALL_64_after_hwframe+0x4b/0x53\n \u003c/TASK\u003e"
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nblock: Eliminar la congelaci\u00f3n de la cola de varias devoluciones de llamada de almacenamiento de sysfs\n\nCongelar la cola de solicitudes desde dentro de las devoluciones de llamada de almacenamiento de sysfs puede causar un interbloqueo en combinaci\u00f3n con el controlador dm-multipath y la opci\u00f3n queue_if_no_path. Adem\u00e1s, congelar la cola de solicitudes ralentiza el arranque del sistema en sistemas donde los atributos de sysfs se configuran sincr\u00f3nicamente.\n\nSolucione esto eliminando las llamadas blk_mq_freeze_queue() / blk_mq_unfreeze_queue() de las devoluciones de llamada de almacenamiento que no necesitan estrictamente estas devoluciones de llamada. Agregue la anotaci\u00f3n __data_racy a request_queue.rq_timeout para suprimir los informes de condici\u00f3n de carrera de datos de KCSAN sobre las lecturas de rq_timeout.\n\nEste parche puede causar un peque\u00f1o retraso al aplicar las nuevas configuraciones.\n\nPara todos los atributos afectados por este parche, la E/S se completar\u00e1 correctamente ya sea que se utilice el valor antiguo o el nuevo del atributo.\n\nEste parche afecta a los siguientes atributos de sysfs:\n* io_poll_delay\n* io_timeout\n* nomerges\n* read_ahead_kb\n* rq_affinity\n\nAqu\u00ed hay un ejemplo de un interbloqueo desencadenado al ejecutar la prueba srp/002 si este parche no se aplica:\n\ntarea:multipathd\nRastro de Llamada:\n \n __schedule+0x8c1/0x1bf0\n schedule+0xdd/0x270\n schedule_preempt_disabled+0x1c/0x30\n __mutex_lock+0xb89/0x1650\n mutex_lock_nested+0x1f/0x30\n dm_table_set_restrictions+0x823/0xdf0\n __bind+0x166/0x590\n dm_swap_table+0x2a7/0x490\n do_resume+0x1b1/0x610\n dev_suspend+0x55/0x1a0\n ctl_ioctl+0x3a5/0x7e0\n dm_ctl_ioctl+0x12/0x20\n __x64_sys_ioctl+0x127/0x1a0\n x64_sys_call+0xe2b/0x17d0\n do_syscall_64+0x96/0x3a0\n entry_SYSCALL_64_after_hwframe+0x4b/0x53\n \ntarea:(udev-worker)\nRastro de Llamada:\n \n __schedule+0x8c1/0x1bf0\n schedule+0xdd/0x270\n blk_mq_freeze_queue_wait+0xf2/0x140\n blk_mq_freeze_queue_nomemsave+0x23/0x30\n queue_ra_store+0x14e/0x290\n queue_attr_store+0x23e/0x2c0\n sysfs_kf_write+0xde/0x140\n kernfs_fop_write_iter+0x3b2/0x630\n vfs_write+0x4fd/0x1390\n ksys_write+0xfd/0x230\n __x64_sys_write+0x76/0xc0\n x64_sys_call+0x276/0x17d0\n do_syscall_64+0x96/0x3a0\n entry_SYSCALL_64_after_hwframe+0x4b/0x53\n "
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}

CVE-2025-71117 (GCVE-0-2025-71117)

Vulnerability from cvelistv5 – Published: 2026-01-14 15:06 – Updated: 2026-02-09 08:35

Title

block: Remove queue freezing from several sysfs store callbacks

Summary

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/3997b3147c7b68b03…
	https://git.kernel.org/stable/c/935a20d1bebf62360…

Impacted products

Vendor

Product

Version

Linux

Affected: af2814149883e2c1851866ea2afcd8eadc040f79 , < 3997b3147c7b68b0308378fa95a766015f8ceb1c (git)
Affected: af2814149883e2c1851866ea2afcd8eadc040f79 , < 935a20d1bebf6236076785fac3ff81e3931834e9 (git)

Linux

Affected: 6.11
Unaffected: 0 , < 6.11 (semver)
Unaffected: 6.18.3 , ≤ 6.18.* (semver)
Unaffected: 6.19 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

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      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "block/blk-sysfs.c",
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              "versionType": "semver"
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              "version": "6.19",
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      "title": "block: Remove queue freezing from several sysfs store callbacks",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2025-71117",
    "datePublished": "2026-01-14T15:06:05.161Z",
    "dateReserved": "2026-01-13T15:30:19.653Z",
    "dateUpdated": "2026-02-09T08:35:11.951Z",
    "state": "PUBLISHED"
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}

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.

Action not permitted

FKIE_CVE-2025-71117

CVE-2025-71117 (GCVE-0-2025-71117)

Tags

Sightings

Nomenclature