Description
In the Linux kernel, the following vulnerability has been resolved: xfrm: account XFRMA_IF_ID in aevent size calculation xfrm_get_ae() allocates the reply skb with xfrm_aevent_msgsize(), then build_aevent() appends attributes including XFRMA_IF_ID when x->if_id is set. xfrm_aevent_msgsize() does not include space for XFRMA_IF_ID. For states with if_id, build_aevent() can fail with -EMSGSIZE and hit BUG_ON(err < 0) in xfrm_get_ae(), turning a malformed netlink interaction into a kernel panic. Account XFRMA_IF_ID in the size calculation unconditionally and replace the BUG_ON with normal error unwinding.
Affected products
linux: linux kernel
References6
- git.kernel.org/stable/c/2c41283d94af943a05f7f2cc1a01f0c872f3cf43 Patch
- git.kernel.org/stable/c/58e5735d1a5373652f405a0c16e54ac04aaab0ad Patch
- git.kernel.org/stable/c/7081d46d32312f1a31f0e0e99c6835a394037599 Patch
- git.kernel.org/stable/c/e62e322ea20be78e346e4b49f9a6b9f03313af4c Patch
- git.kernel.org/stable/c/b7dbdc34d22f743abb2c460dfae0d69cd8a45e69
- git.kernel.org/stable/c/f8f3bb89ab677db15f9f5250c77af728f9afe995
Metrics
- CVSS 3.1
-
5.5
MEDIUM
Score source: NVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - EPSS — exploit probability
- 0% percentile: 5 · as of 13 November 2026
- CWE
- CWE-131
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