{"id":"CVE-2022-50043","title":"net: fix potential refcount leak in ndisc_router_discovery()","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: fix potential refcount leak in ndisc_router_discovery()\n\nThe issue happens on specific paths in the function. After both the\nobject `rt` and `neigh` are grabbed su…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 6b2e04bc240fe9be9e690059f710e9f95346d34d < ffb15594433391fd7885eb88ce5a7f7bdeefbb15","Linux >= 6b2e04bc240fe9be9e690059f710e9f95346d34d < 7998043d31d000c3a93f46182e6569dd0eecda34","Linux >= 6b2e04bc240fe9be9e690059f710e9f95346d34d < 7396ba87f1edf549284869451665c7c4e74ecd4f","Linux 5.12"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-05T19:53:20.660559Z"},"published":"2025-06-18","updated":"2026-11-05","sourceUpdated":"2026-11-05T20:00:14.681Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2022-50043","references":[{"url":"https://git.kernel.org/stable/c/ffb15594433391fd7885eb88ce5a7f7bdeefbb15"},{"url":"https://git.kernel.org/stable/c/7998043d31d000c3a93f46182e6569dd0eecda34"},{"url":"https://git.kernel.org/stable/c/7396ba87f1edf549284869451665c7c4e74ecd4f"}],"tags":["cve.org"],"epss":0.00195,"epssPercentile":0.09231,"ingestedAt":"2026-11-05T22:38:31.638Z","slug":"CVE-2022-50043","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nnet: fix potential refcount leak in ndisc_router_discovery()\n\nThe issue happens on specific paths in the function. After both the\nobject `rt` and `neigh` are grabbed successfully, when `lifetime` is\nnonzero but the metric needs change, the function just deletes the\nroute and set `rt` to NULL. Then, it may try grabbing `rt` and `neigh`\nagain if above conditions hold. The function simply overwrite `neigh`\nif succeeds or returns if fails, without decreasing the reference\ncount of previous `neigh`. This may result in memory leaks.\n\nFix it by decrementing the reference count of `neigh` in place.\n\n## Affected\n\n- `Linux >= 6b2e04bc240fe9be9e690059f710e9f95346d34d < ffb15594433391fd7885eb88ce5a7f7bdeefbb15`\n- `Linux >= 6b2e04bc240fe9be9e690059f710e9f95346d34d < 7998043d31d000c3a93f46182e6569dd0eecda34`\n- `Linux >= 6b2e04bc240fe9be9e690059f710e9f95346d34d < 7396ba87f1edf549284869451665c7c4e74ecd4f`\n- `Linux 5.12`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}