PT-2025-11016 · Linux+5 · Linux Kernel+5
Published
2025-02-13
·
Updated
2026-04-20
·
CVE-2025-21854
CVSS v3.1
5.5
Medium
| Vector | AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
Name of the Vulnerable Software and Affected Versions:
Linux kernel versions prior to 6.14.0-rc1+
Description:
The issue concerns the Linux kernel, specifically the sockmap and vsock components. It involves a scenario where an unconnected socket may lose its assigned transport, leading to a null pointer dereference. This can occur when a listening vsock has a transport assigned during a failed connect attempt. The problem is handled by modifying sockmap to only allow connected sockets, aligning with the behavior for AF INET and AF UNIX.
Recommendations:
For Linux kernel versions prior to 6.14.0-rc1+, update to a version that includes the fix for this issue.
As a temporary workaround, consider restricting access to the vsock component until a patch is available.
Avoid using the
vsock read skb function in the affected kernel versions until the issue is resolved.Exploit
Fix
NULL Pointer Dereference
Found an issue in the description? Have something to add? Feel free to write us 👾
Weakness Enumeration
Related Identifiers
Affected Products
Alt Linux
Astra Linux
Linuxmint
Linux Kernel
Suse
Ubuntu