CVE-2026-22991

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2026-22991
In the Linux kernel, the following vulnerability has been resolved: libceph: make free_choose_arg_map() resilient to partial allocation free_choose_arg_map() may dereference a NULL pointer if its caller fails after a partial allocation. For example, in decode_choose_args(), if allocation of arg_map->args fails, execution jumps to the fail label and free_choose_arg_map() is called. Since arg_map->size is updated to a non-zero value before memory allocation, free_choose_arg_map() will iterate over arg_map->args and dereference a NULL pointer. To prevent this potential NULL pointer dereference and make free_choose_arg_map() more resilient, add checks for pointers before iterating.

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

References
Link Resource
https://git.kernel.org/stable/c/8081faaf089db5280c3be820948469f7c58ef8dd Patch
https://git.kernel.org/stable/c/851241d3f78a5505224dc21c03d8692f530256b4 Patch
https://git.kernel.org/stable/c/9b3730dabcf3764bfe3ff07caf55e641a0b45234 Patch
https://git.kernel.org/stable/c/c4c2152a858c0ce4d2bff6ca8c1d5b0ef9f2cbdf Patch
https://git.kernel.org/stable/c/e3fe30e57649c551757a02e1cad073c47e1e075e Patch
https://git.kernel.org/stable/c/ec1850f663da64842614c86b20fe734be070c2ba Patch
https://git.kernel.org/stable/c/f21c3fdb96833aac2f533506899fe38c19cf49d5 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:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.19:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.19:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.19:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.19:rc4:*:*:*:*:*:*
History

26 Feb 2026, 18:50

Type Values Removed Values Added
CPE cpe:2.3:o:linux:linux_kernel:6.19:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.19:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.19:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.19:rc3:*:*:*:*:*:*
CWE CWE-476
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 5.5
First Time Linux
Linux linux Kernel
References () https://git.kernel.org/stable/c/8081faaf089db5280c3be820948469f7c58ef8dd - () https://git.kernel.org/stable/c/8081faaf089db5280c3be820948469f7c58ef8dd - Patch
References () https://git.kernel.org/stable/c/851241d3f78a5505224dc21c03d8692f530256b4 - () https://git.kernel.org/stable/c/851241d3f78a5505224dc21c03d8692f530256b4 - Patch
References () https://git.kernel.org/stable/c/9b3730dabcf3764bfe3ff07caf55e641a0b45234 - () https://git.kernel.org/stable/c/9b3730dabcf3764bfe3ff07caf55e641a0b45234 - Patch
References () https://git.kernel.org/stable/c/c4c2152a858c0ce4d2bff6ca8c1d5b0ef9f2cbdf - () https://git.kernel.org/stable/c/c4c2152a858c0ce4d2bff6ca8c1d5b0ef9f2cbdf - Patch
References () https://git.kernel.org/stable/c/e3fe30e57649c551757a02e1cad073c47e1e075e - () https://git.kernel.org/stable/c/e3fe30e57649c551757a02e1cad073c47e1e075e - Patch
References () https://git.kernel.org/stable/c/ec1850f663da64842614c86b20fe734be070c2ba - () https://git.kernel.org/stable/c/ec1850f663da64842614c86b20fe734be070c2ba - Patch
References () https://git.kernel.org/stable/c/f21c3fdb96833aac2f533506899fe38c19cf49d5 - () https://git.kernel.org/stable/c/f21c3fdb96833aac2f533506899fe38c19cf49d5 - Patch

23 Jan 2026, 16:15

Type Values Removed Values Added
New CVE
Information

Published : 2026-01-23 16:15

Updated : 2026-02-26 18:50

NVD link : CVE-2026-22991

Mitre link : CVE-2026-22991

CVE.ORG link : CVE-2026-22991

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
CWE-476

NULL Pointer Dereference