CVE-2025-21836

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2025-21836
In the Linux kernel, the following vulnerability has been resolved: io_uring/kbuf: reallocate buf lists on upgrade IORING_REGISTER_PBUF_RING can reuse an old struct io_buffer_list if it was created for legacy selected buffer and has been emptied. It violates the requirement that most of the field should stay stable after publish. Always reallocate it instead.

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/146a185f6c05ee263db715f860620606303c4633 Patch
https://git.kernel.org/stable/c/2a5febbef40ce968e295a7aeaa5d5cbd9e3e5ad4 Patch
https://git.kernel.org/stable/c/7d0dc28dae836caf7645fef62a10befc624dd17b Patch
https://git.kernel.org/stable/c/8802766324e1f5d414a81ac43365c20142e85603 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:6.14:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.14:rc2:*:*:*:*:*:*
History

29 Oct 2025, 20:51

Type Values Removed Values Added
Summary
  • (es) En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: io_uring/kbuf: reasignar listas de búferes en la actualización IORING_REGISTER_PBUF_RING puede reutilizar una estructura io_buffer_list antigua si se creó para un búfer seleccionado heredado y se vació. Viola el requisito de que la mayor parte del campo debe permanecer estable después de la publicación. Siempre reasignarlo en su lugar.
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 5.5
First Time Linux linux Kernel
Linux
CPE cpe:2.3:o:linux:linux_kernel:6.14:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.14:rc1:*:*:*:*:*:*
CWE NVD-CWE-noinfo
References () https://git.kernel.org/stable/c/146a185f6c05ee263db715f860620606303c4633 - () https://git.kernel.org/stable/c/146a185f6c05ee263db715f860620606303c4633 - Patch
References () https://git.kernel.org/stable/c/2a5febbef40ce968e295a7aeaa5d5cbd9e3e5ad4 - () https://git.kernel.org/stable/c/2a5febbef40ce968e295a7aeaa5d5cbd9e3e5ad4 - Patch
References () https://git.kernel.org/stable/c/7d0dc28dae836caf7645fef62a10befc624dd17b - () https://git.kernel.org/stable/c/7d0dc28dae836caf7645fef62a10befc624dd17b - Patch
References () https://git.kernel.org/stable/c/8802766324e1f5d414a81ac43365c20142e85603 - () https://git.kernel.org/stable/c/8802766324e1f5d414a81ac43365c20142e85603 - Patch

07 Mar 2025, 09:15

Type Values Removed Values Added
New CVE
Information

Published : 2025-03-07 09:15

Updated : 2025-10-29 20:51

NVD link : CVE-2025-21836

Mitre link : CVE-2025-21836

CVE.ORG link : CVE-2025-21836

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
NVD-CWE-noinfo