CVE-2026-43090
Description
AI Translation Available
In the Linux kernel, the following vulnerability has been resolved:
xfrm: fix refcount leak in xfrm_migrate_policy_find
syzkaller reported a memory leak in xfrm_policy_alloc:
BUG: memory leak
unreferenced object 0xffff888114d79000 (size 1024):
comm 'syz.1.17', pid 931
...
xfrm_policy_alloc+0xb3/0x4b0 net/xfrm/xfrm_policy.c:432
The root cause is a double call to xfrm_pol_hold_rcu() in
xfrm_migrate_policy_find(). The lookup function already returns
a policy with held reference, making the second call redundant.
Remove the redundant xfrm_pol_hold_rcu() call to fix the refcount
imbalance and prevent the memory leak.
Found by Linux Verification Center (linuxtesting.org) with Syzkaller.
https://git.kernel.org/stable/c/21e235a36cfb6d145cefb10728f12f5dc5412f54
https://git.kernel.org/stable/c/70c2a89a3bc207c3bfbf6f21bb439809e0a4a27a
https://git.kernel.org/stable/c/83317cce60a032c49480dcdabe146435bd689d03
https://git.kernel.org/stable/c/836ee1b0426ea3db31531e9581cc32f513d24e32