Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 6b2e04bc240fe9be9e690059f710e9f95346d34d before ffb15594433391fd7885eb88ce5a7f7bdeefbb15; affected 6b2e04bc240fe9be9e690059f710e9f95346d34d before 7998043d31d000c3a93f46182e6569dd0eecda34; affected 6b2e04bc240fe9be9e690059f710e9f95346d34d before 7396ba87f1edf549284869451665c7c4e74ecd4f |
| Linux / Linux | affected 5.12; unaffected 0 before 5.12; unaffected 5.15.63 through 5.15.*; unaffected 5.19.4 through 5.19.*; unaffected 6.0 through * |
CWE
No CWE identifiers supplied.