PT-2025-11026 · Linux+10 · Linux Kernel+10
Xiumei Mu
·
Published
2025-02-20
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Updated
2026-04-20
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CVE-2025-21864
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 (affected versions not specified)
Description:
A vulnerability in the Linux kernel has been resolved. The issue occurs when a secpath, which holds a reference on an xfrm state, is still attached to an skb and not deleted at the time a netns is deleted. This happens because the skb is defer-free'd by skb attempt defer free and its defer list is not flushed before the netns is deleted. The problem arises when running tests that involve creating a pair of netns, running a basic TCP test over ipcomp6, and then deleting the pair of netns. To fix this, the secpath is dropped at the same time as the dst in the TCP receive path.
Recommendations:
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
Exploit
DoS
NULL Pointer Dereference
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Weakness Enumeration
Related Identifiers
Affected Products
Alt Linux
Almalinux
Astra Linux
Debian
Linuxmint
Linux Kernel
Red Hat
Red Os
Rocky Linux
Suse
Ubuntu