CVE-2022-48865
tipc: fix kernel panic when enabling bearer
- Published
- Updated
- Reserved
- Assigned by
- Linux
Description
In the Linux kernel, the following vulnerability has been resolved: tipc: fix kernel panic when enabling bearer When enabling a bearer on a node, a kernel panic is observed: [ 4.498085] RIP: 0010:tipc_mon_prep+0x4e/0x130 [tipc] ... [ 4.520030] Call Trace: [ 4.520689] <IRQ> [ 4.521236] tipc_link_build_proto_msg+0x375/0x750 [tipc] [ 4.522654] tipc_link_build_state_msg+0x48/0xc0 [tipc] [ 4.524034] __tipc_node_link_up+0xd7/0x290 [tipc] [ 4.525292] tipc_rcv+0x5da/0x730 [tipc] [ 4.526346] ? __netif_receive_skb_core+0xb7/0xfc0 [ 4.527601] tipc_l2_rcv_msg+0x5e/0x90 [tipc] [ 4.528737] __netif_receive_skb_list_core+0x20b/0x260 [ 4.530068] netif_receive_skb_list_internal+0x1bf/0x2e0 [ 4.531450] ? dev_gro_receive+0x4c2/0x680 [ 4.532512] napi_complete_done+0x6f/0x180 [ 4.533570] virtnet_poll+0x29c/0x42e [virtio_net] ... The node in question is receiving activate messages in another thread after changing bearer status to allow message sending/ receiving in current thread: thread 1 | thread 2 -------- | -------- | tipc_enable_bearer() | test_and_set_bit_lock() | tipc_bearer_xmit_skb() | | tipc_l2_rcv_msg() | tipc_rcv() | __tipc_node_link_up() | tipc_link_build_state_msg() | tipc_link_build_proto_msg() | tipc_mon_prep() | { | ... | // null-pointer dereference | u16 gen = mon->dom_gen; | ... | } // Not being executed yet | tipc_mon_create() | { | ... | // allocate | mon = kzalloc(); | ... | } | Monitoring pointer in thread 2 is dereferenced before monitoring data is allocated in thread 1. This causes kernel panic. This commit fixes it by allocating the monitoring data before enabling the bearer to receive messages.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.26% · top 82% of all CVEs (5 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Weakness
Affected products
- affected 35c55c9877f8de0ab129fa1a309271d0ecc868b9 – < 2de76d37d4a6dca9b96ea51da24d4290e6cfa1a5
- affected 35c55c9877f8de0ab129fa1a309271d0ecc868b9 – < f96dc3adb9a97b8f3dfdb88796483491a3006b71
- affected 35c55c9877f8de0ab129fa1a309271d0ecc868b9 – < f4f59fdbc748805b08c13dae14c01f0518c77c94
- affected 35c55c9877f8de0ab129fa1a309271d0ecc868b9 – < be4977b847f5d5cedb64d50eaaf2218c3a55a3a3
- affected 4.8
- unaffected < 4.8
- unaffected 5.10.106 – ≤ 5.10.*
- unaffected 5.15.29 – ≤ 5.15.*
- unaffected 5.16.15 – ≤ 5.16.*
- unaffected 5.17 – ≤ *
References (4)
- https://git.kernel.org/stable/c/2de76d37d4a6dca9b96ea51da24d4290e6cfa1a5 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/f96dc3adb9a97b8f3dfdb88796483491a3006b71 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/f4f59fdbc748805b08c13dae14c01f0518c77c94 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/be4977b847f5d5cedb64d50eaaf2218c3a55a3a3 (opens in a new tab)x_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2022-48865)Record last updated .