Description
In the Linux kernel, the following vulnerability has been resolved: tipc: force a dst refcount before doing decryption As it says in commit 3bc07321ccc2 ("xfrm: Force a dst refcount before entering the xfrm type handlers"): "Crypto requests might return asynchronous. In this case we leave the rcu protected region, so force a refcount on the skb's destination entry before we enter the xfrm type input/output handlers." On TIPC decryption path it has the same problem, and skb_dst_force() should be called before doing decryption to avoid a possible crash. Shuang reported this issue when this warning is triggered: [] WARNING: include/net/dst.h:337 tipc_sk_rcv+0x1055/0x1ea0 [tipc] [] Kdump: loaded Tainted: G W --------- - - 4.18.0-496.el8.x86_64+debug [] Workqueue: crypto cryptd_queue_worker [] RIP: 0010:tipc_sk_rcv+0x1055/0x1ea0 [tipc] [] Call Trace: [] tipc_sk_mcast_rcv+0x548/0xea0 [tipc] [] tipc_rcv+0xcf5/0x1060 [tipc] [] tipc_aead_decrypt_done+0x215/0x2e0 [tipc] [] cryptd_aead_crypt+0xdb/0x190 [] cryptd_queue_worker+0xed/0x190 [] process_one_work+0x93d/0x17e0
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
fc1b6d6de2208774efd2a20bf0daddb02d18b1e0 to < 3eb1b39627892c4e26cb0162b75725aa5fcc60c8affectedfc1b6d6de2208774efd2a20bf0daddb02d18b1e0 to < 692803b39a36e63ac73208e0a3769ae6a2f9bc76affectedfc1b6d6de2208774efd2a20bf0daddb02d18b1e0 to < 623c90d86a61e3780f682b32928af469c66ec4c2affectedfc1b6d6de2208774efd2a20bf0daddb02d18b1e0 to < b57a4a2dc8746cea58a922ebe31b6aa629d69d93affectedfc1b6d6de2208774efd2a20bf0daddb02d18b1e0 to < 6808b41371670c51feea14f63ade211e78100930affectedfc1b6d6de2208774efd2a20bf0daddb02d18b1e0 to < 2ebe8f840c7450ecbfca9d18ac92e9ce9155e269affected
Linux Linux
Default version status: affected
5.5affected0 to < 5.5unaffected5.10.221 to ≤ 5.10.*unaffected5.15.162 to ≤ 5.15.*unaffected6.1.96 to ≤ 6.1.*unaffected6.6.36 to ≤ 6.6.*unaffected6.9.7 to ≤ 6.9.*unaffected6.10 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/3eb1b39627892c4e26cb0162b75725aa5fcc60c8 ↗
- https://git.kernel.org/stable/c/692803b39a36e63ac73208e0a3769ae6a2f9bc76 ↗
- https://git.kernel.org/stable/c/623c90d86a61e3780f682b32928af469c66ec4c2 ↗
- https://git.kernel.org/stable/c/b57a4a2dc8746cea58a922ebe31b6aa629d69d93 ↗
- https://git.kernel.org/stable/c/6808b41371670c51feea14f63ade211e78100930 ↗
- https://git.kernel.org/stable/c/2ebe8f840c7450ecbfca9d18ac92e9ce9155e269 ↗
- https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html ↗