CVE-2022-49017 (GCVE-0-2022-49017)
Vulnerability from cvelistv5
Published
2024-10-21 20:06
Modified
2026-05-11 18:51
Severity ?
Summary
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().
References
Impacted products
Vendor Product Version
Linux Linux Version: fc1b6d6de2208774efd2a20bf0daddb02d18b1e0
Version: fc1b6d6de2208774efd2a20bf0daddb02d18b1e0
Version: fc1b6d6de2208774efd2a20bf0daddb02d18b1e0
Version: fc1b6d6de2208774efd2a20bf0daddb02d18b1e0
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntipc: re-fetch skb cb after tipc_msg_validate\n\nAs the call trace shows, the original skb was freed in tipc_msg_validate(),\nand dereferencing the old skb cb would cause an use-after-free crash.\n\n  BUG: KASAN: use-after-free in tipc_crypto_rcv_complete+0x1835/0x2240 [tipc]\n  Call Trace:\n   \u003cIRQ\u003e\n   tipc_crypto_rcv_complete+0x1835/0x2240 [tipc]\n   tipc_crypto_rcv+0xd32/0x1ec0 [tipc]\n   tipc_rcv+0x744/0x1150 [tipc]\n  ...\n  Allocated by task 47078:\n   kmem_cache_alloc_node+0x158/0x4d0\n   __alloc_skb+0x1c1/0x270\n   tipc_buf_acquire+0x1e/0xe0 [tipc]\n   tipc_msg_create+0x33/0x1c0 [tipc]\n   tipc_link_build_proto_msg+0x38a/0x2100 [tipc]\n   tipc_link_timeout+0x8b8/0xef0 [tipc]\n   tipc_node_timeout+0x2a1/0x960 [tipc]\n   call_timer_fn+0x2d/0x1c0\n  ...\n  Freed by task 47078:\n   tipc_msg_validate+0x7b/0x440 [tipc]\n   tipc_crypto_rcv_complete+0x4b5/0x2240 [tipc]\n   tipc_crypto_rcv+0xd32/0x1ec0 [tipc]\n   tipc_rcv+0x744/0x1150 [tipc]\n\nThis patch fixes it by re-fetching the skb cb from the new allocated skb\nafter calling tipc_msg_validate()."
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