Description
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 products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 4cce478c3e82a5fc788d72adb2f4c4e983997639affected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 9c547c8eee9d1cf6e744611d688b9f725cf9a115affected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < d7563b456ed44151e1a82091d96f60166daea89baffected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 384210cceb1873a4c8218b27ba0745444436b728affected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < da9c9c877597170b929a6121a68dcd3dd9a80f45affected
Linux Linux
Default version status: affected
2.6.12affected0 to < 2.6.12unaffected6.1.150 to ≤ 6.1.*unaffected6.6.104 to ≤ 6.6.*unaffected6.12.45 to ≤ 6.12.*unaffected6.16.5 to ≤ 6.16.*unaffected6.17 to ≤ *unaffected
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 ↗
- https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html ↗
- https://cert-portal.siemens.com/productcert/html/ssa-032379.html ↗
- https://cert-portal.siemens.com/productcert/html/ssa-019113.html ↗
- https://cert-portal.siemens.com/productcert/html/ssa-457936.html ↗