{"cve":"CVE-2026-43090","nvd":{"published":"2026-05-06T10:16:22.313","modified":"2026-06-17T10:48:55.080","status":"Analyzed","description":"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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":5.5},"cwes":[],"references":["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"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T22:33:55.586217763+00:00"},"epss":{"cve":"CVE-2026-43090","score":0.00122,"percentile":0.01947,"date":"2026-11-01"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}