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Tracker / CVE-2025-39827

CVE-2025-39827

Alta 8.8

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.

Prodotti e versioni affette

debian debian_linux
linux linux_kernel
linux linux_kernel · 2.6.12.1 → 6.1.150
linux linux_kernel · 6.13 → 6.16.5
linux linux_kernel · 6.2 → 6.6.104
linux linux_kernel · 6.7 → 6.12.45

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