CVE-2026-43090 (GCVE-0-2026-43090)

Vulnerability from cvelistv5 – Published: 2026-05-06 07:40 – Updated: 2026-05-11 22:17
VLAI
Title
xfrm: fix refcount leak in xfrm_migrate_policy_find
Summary
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.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 563d5ca93e883b9dcb4b7dc8967ac569fd91820d , < 21e235a36cfb6d145cefb10728f12f5dc5412f54 (git)
Affected: 563d5ca93e883b9dcb4b7dc8967ac569fd91820d , < 836ee1b0426ea3db31531e9581cc32f513d24e32 (git)
Affected: 563d5ca93e883b9dcb4b7dc8967ac569fd91820d , < 70c2a89a3bc207c3bfbf6f21bb439809e0a4a27a (git)
Affected: 563d5ca93e883b9dcb4b7dc8967ac569fd91820d , < 83317cce60a032c49480dcdabe146435bd689d03 (git)
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Linux Linux Affected: 6.12
Unaffected: 0 , < 6.12 (semver)
Unaffected: 6.12.83 , ≤ 6.12.* (semver)
Unaffected: 6.18.24 , ≤ 6.18.* (semver)
Unaffected: 6.19.14 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)
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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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