CVE-2025-38273

In the Linux kernel, the following vulnerability has been resolved: net: tipc: fix refcount warning in tipc_aead_encrypt syzbot reported a refcount warning [1] caused by calling get_net() on a network namespace that is being destroyed (refcount=0). This happens when a TIPC discovery timer fires during network namespace cleanup. The recently added get_net() call in commit e279024617134 ("net/tipc: fix slab-use-after-free Read in tipc_aead_encrypt_done") attempts to hold a reference to the network namespace. However, if the namespace is already being destroyed, its refcount might be zero, leading to the use-after-free warning. Replace get_net() with maybe_get_net(), which safely checks if the refcount is non-zero before incrementing it. If the namespace is being destroyed, return -ENODEV early, after releasing the bearer reference. [1]: https://lore.kernel.org/all/[email protected]/T/#m12019cf9ae77e1954f666914640efa36d52704a2

• linux linux kernel (>= 6.12.31 < 6.12.34) • linux linux kernel (>= 6.14.9 < 6.15) • linux linux kernel (>= 6.15.1 < 6.15.3) • linux linux kernel 5.10.238 • linux linux kernel 5.15.185 • linux linux kernel 6.1.141 • linux linux kernel 6.6.93 • linux linux kernel 6.15 • debian debian linux 11.0