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.

CVSS v3 5.5 MEDIUM

5.5^/10

CVSS v3 : MEDIUM

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

No history.

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

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