CVE-2025-37759

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  2. Vulnerabilities (CVE)
  3. CVE-2025-37759

5.5 /10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

I

n the Linux kernel, the following vulnerability has been resolved: ublk: fix handling recovery & reissue in ublk_abort_queue() Commit 8284066946e6 ("ublk: grab request reference when the request is handled by userspace") doesn't grab request reference in case of recovery reissue. Then the request can be requeued & re-dispatch & failed when canceling uring command. If it is one zc request, the request can be freed before io_uring returns the zc buffer back, then cause kernel panic: [ 126.773061] BUG: kernel NULL pointer dereference, address: 00000000000000c8 [ 126.773657] #PF: supervisor read access in kernel mode [ 126.774052] #PF: error_code(0x0000) - not-present page [ 126.774455] PGD 0 P4D 0 [ 126.774698] Oops: Oops: 0000 [#1] SMP NOPTI [ 126.775034] CPU: 13 UID: 0 PID: 1612 Comm: kworker/u64:55 Not tainted 6.14.0_blk+ #182 PREEMPT(full) [ 126.775676] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-1.fc39 04/01/2014 [ 126.776275] Workqueue: iou_exit io_ring_exit_work [ 126.776651] RIP: 0010:ublk_io_release+0x14/0x130 [ublk_drv] Fixes it by always grabbing request reference for aborting the request.

References
Link Resource
https://git.kernel.org/stable/c/0a21d259ca4d6310fdfcc0284ebbc000e66cbf70 Patch
https://git.kernel.org/stable/c/5d34a30efac9c9c93e150130caa940c0df6053c1 Patch
https://git.kernel.org/stable/c/6ee6bd5d4fce502a5b5a2ea805e9ff16e6aa890f Patch
https://git.kernel.org/stable/c/caa5c8a2358604f38bf0a4afaa5eacda13763067 Patch
Configurations

Configuration 1 (hide)

OR cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.15:rc1:*:*:*:*:*:*
History

06 Nov 2025, 21:44

Type Values Removed Values Added
CPE cpe:2.3:o:linux:linux_kernel:6.15:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Summary
  • (es) En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ublk: corrección del manejo de la recuperación y la reemisión en ublk_abort_queue(). La confirmación 8284066946e6 ("ublk: toma la referencia de la solicitud cuando la solicitud es manejada por el espacio de usuario") no toma la referencia de la solicitud en caso de reemisión de recuperación. En ese caso, la solicitud se puede volver a poner en cola y reenviar, y falla al cancelar el comando "uring". Si es una solicitud zc, la solicitud se puede liberar antes de que io_uring devuelva el buffer zc, y luego cause pánico en el kernel: [ 126.773061] ERROR: desreferencia de puntero NULL del kernel, dirección: 00000000000000c8 [ 126.773657] #PF: acceso de lectura del supervisor en modo kernel [ 126.774052] #PF: error_code(0x0000) - página no presente [ 126.774455] PGD 0 P4D 0 [ 126.774698] Oops: Oops: 0000 [#1] SMP NOPTI [ 126.775034] CPU: 13 UID: 0 PID: 1612 Comm: kworker/u64:55 No contaminado 6.14.0_blk+ #182 PREEMPT(full) [ 126.775676] Nombre del hardware: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-1.fc39 01/04/2014 [ 126.776275] Cola de trabajo: iou_exit io_ring_exit_work [ 126.776651] RIP: 0010:ublk_io_release+0x14/0x130 [ublk_drv] Lo corrige tomando siempre la referencia de la solicitud para abortar la solicitud.
CWE CWE-476
First Time Linux linux Kernel
Linux
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 5.5
References () https://git.kernel.org/stable/c/0a21d259ca4d6310fdfcc0284ebbc000e66cbf70 - () https://git.kernel.org/stable/c/0a21d259ca4d6310fdfcc0284ebbc000e66cbf70 - Patch
References () https://git.kernel.org/stable/c/5d34a30efac9c9c93e150130caa940c0df6053c1 - () https://git.kernel.org/stable/c/5d34a30efac9c9c93e150130caa940c0df6053c1 - Patch
References () https://git.kernel.org/stable/c/6ee6bd5d4fce502a5b5a2ea805e9ff16e6aa890f - () https://git.kernel.org/stable/c/6ee6bd5d4fce502a5b5a2ea805e9ff16e6aa890f - Patch
References () https://git.kernel.org/stable/c/caa5c8a2358604f38bf0a4afaa5eacda13763067 - () https://git.kernel.org/stable/c/caa5c8a2358604f38bf0a4afaa5eacda13763067 - Patch

01 May 2025, 13:15

Type Values Removed Values Added
New CVE
Information

Published : 2025-05-01 13:15

Updated : 2025-11-06 21:44

NVD link : CVE-2025-37759

Mitre link : CVE-2025-37759

CVE.ORG link : CVE-2025-37759

JSON object : View

Products Affected

linux

CWE
CWE-476

NULL Pointer Dereference