CVE-2026-43107
xfrm: account XFRMA_IF_ID in aevent size calculation
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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.
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | May 6, 2026 |
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Affected Versions
Linux / Linux
7e6526404adedf079279aa7aa11722deaca8fe2e < 2c41283d94af943a05f7f2cc1a01f0c872f3cf43 7e6526404adedf079279aa7aa11722deaca8fe2e < e62e322ea20be78e346e4b49f9a6b9f03313af4c 7e6526404adedf079279aa7aa11722deaca8fe2e < 58e5735d1a5373652f405a0c16e54ac04aaab0ad 7e6526404adedf079279aa7aa11722deaca8fe2e < 7081d46d32312f1a31f0e0e99c6835a394037599
Linux / Linux
4.19
References
git.kernel.org: https://git.kernel.org/stable/c/2c41283d94af943a05f7f2cc1a01f0c872f3cf43 git.kernel.org: https://git.kernel.org/stable/c/e62e322ea20be78e346e4b49f9a6b9f03313af4c git.kernel.org: https://git.kernel.org/stable/c/58e5735d1a5373652f405a0c16e54ac04aaab0ad git.kernel.org: https://git.kernel.org/stable/c/7081d46d32312f1a31f0e0e99c6835a394037599