CVE-2026-43107
Description
AI Translation Available
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.
https://git.kernel.org/stable/c/2c41283d94af943a05f7f2cc1a01f0c872f3cf43
https://git.kernel.org/stable/c/58e5735d1a5373652f405a0c16e54ac04aaab0ad
https://git.kernel.org/stable/c/7081d46d32312f1a31f0e0e99c6835a394037599
https://git.kernel.org/stable/c/e62e322ea20be78e346e4b49f9a6b9f03313af4c