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().
CVSS Details
- CVSS 3.1 Base Score: 8.8
- CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon Linux Ami 2 | — | Upgrade kernel-tools-develUpgrade kernel-livepatch-5.10.162-141.675Upgrade kernel-tools-debuginfoUpgrade kernel-develUpgrade kernel-debuginfo-common-aarch64Upgrade kernel-debuginfoUpgrade bpftoolUpgrade bpftool-debuginfoUpgrade perfUpgrade kernel-toolsUpgrade perf-debuginfoUpgrade kernel-headersUpgrade python-perfUpgrade python-perf-debuginfoUpgrade kernelUpgrade kernel-debuginfo-common-x86_64 | Jan 22, 2025 | Oct 21, 2024 |
| Debian | — | Upgrade linux | Oct 23, 2024 | Oct 23, 2024 |
| Huawei Euleros 2_0_sp12 | — | Upgrade python3-perfUpgrade kernelUpgrade kernel-tools-libsUpgrade bpftoolUpgrade kernel-toolsUpgrade kernel-abi-stablelists | Feb 11, 2025 | Oct 21, 2024 |
| Redhat_linux | — | No solution exists | Jul 9, 2025 | Oct 21, 2024 |
| Ubuntu | — | Upgrade linux-gkeopUpgrade linuxUpgrade linux-gcpUpgrade linux-intel-iotgUpgrade linux-awsUpgrade linux-riscv-5.15Upgrade linux-azure-5.15Upgrade linux-azure-fde-5.15Upgrade linux-intel-iot-realtimeUpgrade linux-oracleUpgrade linux-gkeUpgrade linux-lowlatency-hwe-5.15Upgrade linux-nvidiaUpgrade linux-gkeop-5.15Upgrade linux-lowlatencyUpgrade linux-azureUpgrade linux-azure-fdeUpgrade linux-bluefieldUpgrade linux-kvmUpgrade linux-ibmUpgrade linux-aws-5.15Upgrade linux-realtimeUpgrade linux-gcp-5.15Upgrade linux-oracle-5.15Upgrade linux-intel-iotg-5.15Upgrade linux-hwe-5.15Upgrade linux-raspi | Nov 19, 2024 | Oct 21, 2024 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | May 27, 2026 | Oct 21, 2024 |
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