Vulnerability 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 Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 5.12, < 5.15.63 |
References
- https://git.kernel.org/stable/c/7396ba87f1edf549284869451665c7c4e74ecd4fPatch
- https://git.kernel.org/stable/c/7998043d31d000c3a93f46182e6569dd0eecda34Patch
- https://git.kernel.org/stable/c/ffb15594433391fd7885eb88ce5a7f7bdeefbb15Patch
FAQ
What is CVE-2022-50043?
CVE-2022-50043 is a vulnerability with a CVSS score of 5.5 (MEDIUM). 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 o...
How severe is CVE-2022-50043?
CVE-2022-50043 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2022-50043?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.