Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: tipc: re-fetch skb cb after tipc_msg_validate As the call trace shows, the original skb was freed in tipc_msg_validate(), and dereferencing the old skb cb would cause an use-after-free crash. BUG: KASAN: use-after-free in tipc_crypto_rcv_complete+0x1835/0x2240 [tipc] Call Trace: <IRQ> tipc_crypto_rcv_complete+0x1835/0x2240 [tipc] tipc_crypto_rcv+0xd32/0x1ec0 [tipc] tipc_rcv+0x744/0x1150 [tipc] ... Allocated by task 47078: kmem_cache_alloc_node+0x158/0x4d0 __alloc_skb+0x1c1/0x270 tipc_buf_acquire+0x1e/0xe0 [tipc] tipc_msg_create+0x33/0x1c0 [tipc] tipc_link_build_proto_msg+0x38a/0x2100 [tipc] tipc_link_timeout+0x8b8/0xef0 [tipc] tipc_node_timeout+0x2a1/0x960 [tipc] call_timer_fn+0x2d/0x1c0 ... Freed by task 47078: tipc_msg_validate+0x7b/0x440 [tipc] tipc_crypto_rcv_complete+0x4b5/0x2240 [tipc] tipc_crypto_rcv+0xd32/0x1ec0 [tipc] tipc_rcv+0x744/0x1150 [tipc] This patch fixes it by re-fetching the skb cb from the new allocated skb after calling tipc_msg_validate().
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected fc1b6d6de2208774efd2a20bf0daddb02d18b1e0 before a1ba595e35aa3afbe417ff0af353afb9f65559c0; affected fc1b6d6de2208774efd2a20bf0daddb02d18b1e0 before 1daec0815655e110c6f206c5e777a4af8168ff58; affected fc1b6d6de2208774efd2a20bf0daddb02d18b1e0 before e128190adb2edfd5042105b5d1ed4553f295f5ef; affected fc1b6d6de2208774efd2a20bf0daddb02d18b1e0 before 3067bc61fcfe3081bf4807ce65560f499e895e77 |
| Linux / Linux | affected 5.5; unaffected 0 before 5.5; unaffected 5.10.158 through 5.10.*; unaffected 5.15.82 through 5.15.*; unaffected 6.0.12 through 6.0.*; unaffected 6.1 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/a1ba595e35aa3afbe417ff0af353afb9f65559c0
- https://git.kernel.org/stable/c/1daec0815655e110c6f206c5e777a4af8168ff58
- https://git.kernel.org/stable/c/e128190adb2edfd5042105b5d1ed4553f295f5ef
- https://git.kernel.org/stable/c/3067bc61fcfe3081bf4807ce65560f499e895e77
ADP enrichment
No English description supplied.
No references supplied.