Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: account proxy paths against the mesh path limit Proxy-path churn can drive the interface path counter negative and let later mesh path additions exceed MESH_MAX_MPATHS. mesh_path_free_rcu() decrements the interface mpaths counter for entries from both the mesh and proxy path tables, but mpp_path_add() never reserves a slot in that counter. Removing or expiring a proxy path therefore returns a slot that was never charged. mesh_path_add() uses the same counter to enforce MESH_MAX_MPATHS, so once it falls below the number of installed paths the limit no longer holds. Reserve the shared quota before allocating a proxy path and release it on every unsuccessful addition. Mesh and proxy paths now share one 1024-entry budget, so mpp_path_add() can return -ENOSPC at that limit.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected ece1a2e7e86078c8379937b546e32cb7f25fcb6c before c66ab4b94bb04c162485759196555e08c0965320; affected ece1a2e7e86078c8379937b546e32cb7f25fcb6c before df072db65fdaa34ad15e1d66fc06a53e3e97f778; affected ece1a2e7e86078c8379937b546e32cb7f25fcb6c before 3b75831ceee76d32bb8e7ddd241904f92f9b5407; affected ece1a2e7e86078c8379937b546e32cb7f25fcb6c before 5a32409ed34a1868830899a5d2437f0b3bf3532c; affected ece1a2e7e86078c8379937b546e32cb7f25fcb6c before a5f35d4b112af1415ff06bd501c8cc26cc08aa8b |
| Linux / Linux | affected 3.2; unaffected 0 before 3.2; unaffected 6.6.160 through 6.6.*; unaffected 6.12.113 through 6.12.*; unaffected 6.18.56 through 6.18.*; unaffected 7.2.10 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/c66ab4b94bb04c162485759196555e08c0965320
- https://git.kernel.org/stable/c/df072db65fdaa34ad15e1d66fc06a53e3e97f778
- https://git.kernel.org/stable/c/3b75831ceee76d32bb8e7ddd241904f92f9b5407
- https://git.kernel.org/stable/c/5a32409ed34a1868830899a5d2437f0b3bf3532c
- https://git.kernel.org/stable/c/a5f35d4b112af1415ff06bd501c8cc26cc08aa8b