CVE-2026-52932: xfrm: ipcomp: Free destination pages on acomp errors

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-06-24 · updated 2026-07-08

Description

In the Linux kernel, the following vulnerability has been resolved: xfrm: ipcomp: Free destination pages on acomp errors Move the out_free_req label up by a couple of lines so that the allocated dst SG list gets freed on error as well as success.

Affected products

Linux kernel: from 6.15 before 6.18.35; from 6.19 before 7.0.12; 7.1-rc1, 7.1-rc2, 7.1-rc3, 7.1-rc4, 7.1-rc5 — fixed in 6.18.35, 7.0.12

How to fix

Upgrade to a fixed version: Linux kernel 6.18.35, 7.0.12. Check the vendor advisory for mitigations.

References

https://git.kernel.org/stable/c/7dbac7680eb629b3b4dc7e98c34f943b8814c0c8
https://git.kernel.org/stable/c/b30aa173c3809f6af4c83a86099be1be19aa48eb
https://git.kernel.org/stable/c/dc6dcba80d72a27ab61831ad3d253316e0c9b9d5

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