Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: net: rose: include node references in rose_neigh refcount Current implementation maintains two separate reference counting mechanisms: the 'count' field in struct rose_neigh tracks references from rose_node structures, while the 'use' field (now refcount_t) tracks references from rose_sock. This patch merges these two reference counting systems using 'use' field for proper reference management. Specifically, this patch adds incrementing and decrementing of rose_neigh->use when rose_neigh->count is incremented or decremented. This patch also modifies rose_rt_free(), rose_rt_device_down() and rose_clear_route() to properly release references to rose_neigh objects before freeing a rose_node through rose_remove_node(). These changes ensure rose_neigh structures are properly freed only when all references, including those from rose_node structures, are released. As a result, this resolves a slab-use-after-free issue reported by Syzbot.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 4cce478c3e82a5fc788d72adb2f4c4e983997639; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 9c547c8eee9d1cf6e744611d688b9f725cf9a115; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before d7563b456ed44151e1a82091d96f60166daea89b; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 384210cceb1873a4c8218b27ba0745444436b728; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before da9c9c877597170b929a6121a68dcd3dd9a80f45 |
| Linux / Linux | affected 2.6.12; unaffected 0 before 2.6.12; unaffected 6.1.150 through 6.1.*; unaffected 6.6.104 through 6.6.*; unaffected 6.12.45 through 6.12.*; unaffected 6.16.5 through 6.16.*; unaffected 6.17 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/4cce478c3e82a5fc788d72adb2f4c4e983997639
- https://git.kernel.org/stable/c/9c547c8eee9d1cf6e744611d688b9f725cf9a115
- https://git.kernel.org/stable/c/d7563b456ed44151e1a82091d96f60166daea89b
- https://git.kernel.org/stable/c/384210cceb1873a4c8218b27ba0745444436b728
- https://git.kernel.org/stable/c/da9c9c877597170b929a6121a68dcd3dd9a80f45
ADP enrichment
No English description supplied.
No English description supplied.