CVE-2022-50043
MEDIUM EPSS 5.2%
Published Jun 18, 20251y ago · Modified Jun 17, 20261w ago
5.5 CVSS 3.1
Published Jun 18, 2025 1y ago
Last Modified Jun 17, 2026 1w ago
Description
In the Linux kernel, the following vulnerability has been resolved: net: fix potential refcount leak in ndisc_router_discovery() The issue happens on specific paths in the function. After both the object `rt` and `neigh` are grabbed successfully, when `lifetime` is nonzero but the metric needs change, the function just deletes the route and set `rt` to NULL. Then, it may try grabbing `rt` and `neigh` again if above conditions hold. The function simply overwrite `neigh` if succeeds or returns if fails, without decreasing the reference count of previous `neigh`. This may result in memory leaks. Fix it by decrementing the reference count of `neigh` in place.
CVSS Details
Base Score
Exploitability
Impact
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High
Threat Intelligence
EPSS Exploit Probability
5.2% percentile
Exploit & Patch Status
No Known Exploit
Patch Available
Affected Products 3
References 3
- git.kernel.org https://git.kernel.org/stable/c/7396ba87f1edf549284869451665c7c4e74ecd4f
- git.kernel.org https://git.kernel.org/stable/c/7998043d31d000c3a93f46182e6569dd0eecda34
- git.kernel.org https://git.kernel.org/stable/c/ffb15594433391fd7885eb88ce5a7f7bdeefbb15
Remediation
- git.kernel.org https://git.kernel.org/stable/c/7396ba87f1edf549284869451665c7c4e74ecd4f
- git.kernel.org https://git.kernel.org/stable/c/7998043d31d000c3a93f46182e6569dd0eecda34
- git.kernel.org https://git.kernel.org/stable/c/ffb15594433391fd7885eb88ce5a7f7bdeefbb15