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.
CVSS Details
- CVSS 3.1 Base Score: 5.5
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade linux | Jul 23, 2026 | Jul 23, 2026 |
| Redhat_linux | — | No solution exists | Jul 17, 2026 | May 6, 2026 |
| Ubuntu | — | Upgrade linux-nvidia | May 25, 2026 | May 6, 2026 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Jul 10, 2026 | May 6, 2026 |
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