{"id":"CVE-2026-43090","summary":"xfrm: fix refcount leak in xfrm_migrate_policy_find","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nxfrm: fix refcount leak in xfrm_migrate_policy_find\n\nsyzkaller reported a memory leak in xfrm_policy_alloc:\n\n  BUG: memory leak\n  unreferenced object 0xffff888114d79000 (size 1024):\n    comm \"syz.1.17\", pid 931\n    ...\n    xfrm_policy_alloc+0xb3/0x4b0 net/xfrm/xfrm_policy.c:432\n\nThe root cause is a double call to xfrm_pol_hold_rcu() in\nxfrm_migrate_policy_find(). The lookup function already returns\na policy with held reference, making the second call redundant.\n\nRemove the redundant xfrm_pol_hold_rcu() call to fix the refcount\nimbalance and prevent the memory leak.\n\nFound by Linux Verification Center (linuxtesting.org) with Syzkaller.","modified":"2026-07-08T08:09:34.261952197Z","published":"2026-05-06T07:40:23.286Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43090.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/21e235a36cfb6d145cefb10728f12f5dc5412f54"},{"type":"WEB","url":"https://git.kernel.org/stable/c/70c2a89a3bc207c3bfbf6f21bb439809e0a4a27a"},{"type":"WEB","url":"https://git.kernel.org/stable/c/83317cce60a032c49480dcdabe146435bd689d03"},{"type":"WEB","url":"https://git.kernel.org/stable/c/836ee1b0426ea3db31531e9581cc32f513d24e32"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43090.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-43090"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"563d5ca93e883b9dcb4b7dc8967ac569fd91820d"},{"fixed":"21e235a36cfb6d145cefb10728f12f5dc5412f54"},{"fixed":"836ee1b0426ea3db31531e9581cc32f513d24e32"},{"fixed":"70c2a89a3bc207c3bfbf6f21bb439809e0a4a27a"},{"fixed":"83317cce60a032c49480dcdabe146435bd689d03"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-43090.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.12.0"},{"fixed":"6.12.83"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.24"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"6.19.14"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-43090.json"}}],"schema_version":"1.7.5"}