CVE-2022-49321
xprtrdma: treat all calls not a bcall when bc_serv is NULL
- Published
- Updated
- Reserved
- Assigned by
- Linux
Description
In the Linux kernel, the following vulnerability has been resolved: xprtrdma: treat all calls not a bcall when bc_serv is NULL When a rdma server returns a fault format reply, nfs v3 client may treats it as a bcall when bc service is not exist. The debug message at rpcrdma_bc_receive_call are, [56579.837169] RPC: rpcrdma_bc_receive_call: callback XID 00000001, length=20 [56579.837174] RPC: rpcrdma_bc_receive_call: 00 00 00 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 04 After that, rpcrdma_bc_receive_call will meets NULL pointer as, [ 226.057890] BUG: unable to handle kernel NULL pointer dereference at 00000000000000c8 ... [ 226.058704] RIP: 0010:_raw_spin_lock+0xc/0x20 ... [ 226.059732] Call Trace: [ 226.059878] rpcrdma_bc_receive_call+0x138/0x327 [rpcrdma] [ 226.060011] __ib_process_cq+0x89/0x170 [ib_core] [ 226.060092] ib_cq_poll_work+0x26/0x80 [ib_core] [ 226.060257] process_one_work+0x1a7/0x360 [ 226.060367] ? create_worker+0x1a0/0x1a0 [ 226.060440] worker_thread+0x30/0x390 [ 226.060500] ? create_worker+0x1a0/0x1a0 [ 226.060574] kthread+0x116/0x130 [ 226.060661] ? kthread_flush_work_fn+0x10/0x10 [ 226.060724] ret_from_fork+0x35/0x40 ...
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| CISA-ADPADP (enrichment) | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
| 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)
- 0.77% · top 44% 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: High 7.5.
Weakness
Affected products
- affected 63cae47005af51c937f4cdcc4835f29075add2ba – < 8e3943c50764dc7c5f25911970c3ff062ec1f18c
- affected 63cae47005af51c937f4cdcc4835f29075add2ba – < 998d35a2aff4b81a1c784f3aa45cd3afff6814c1
- affected 63cae47005af51c937f4cdcc4835f29075add2ba – < da99331fa62131a38a0947a8204c5208de7b0454
- affected 63cae47005af51c937f4cdcc4835f29075add2ba – < 8dbae5affbdbf524b48000f9d357925bb001e5f4
- affected 63cae47005af51c937f4cdcc4835f29075add2ba – < a3fc8051ee061e31db13e2fe011e8e0b71a7f815
- affected 63cae47005af51c937f4cdcc4835f29075add2ba – < 90c4f73104016748533a5707ecd15930fbeff402
- affected 63cae47005af51c937f4cdcc4835f29075add2ba – < 91784f3d77b73885e1b2e6b59d3cbf0de0a1126a
- affected 63cae47005af51c937f4cdcc4835f29075add2ba – < 11270e7ca268e8d61b5d9e5c3a54bd1550642c9c
- affected 4.4
- unaffected < 4.4
- unaffected 4.14.283 – ≤ 4.14.*
- unaffected 4.19.247 – ≤ 4.19.*
- unaffected 5.4.198 – ≤ 5.4.*
- unaffected 5.10.122 – ≤ 5.10.*
- unaffected 5.15.47 – ≤ 5.15.*
- unaffected 5.17.15 – ≤ 5.17.*
- unaffected 5.18.4 – ≤ 5.18.*
- unaffected 5.19 – ≤ *
References (8)
- https://git.kernel.org/stable/c/8e3943c50764dc7c5f25911970c3ff062ec1f18c (opens in a new tab)
- https://git.kernel.org/stable/c/998d35a2aff4b81a1c784f3aa45cd3afff6814c1 (opens in a new tab)
- https://git.kernel.org/stable/c/da99331fa62131a38a0947a8204c5208de7b0454 (opens in a new tab)
- https://git.kernel.org/stable/c/8dbae5affbdbf524b48000f9d357925bb001e5f4 (opens in a new tab)
- https://git.kernel.org/stable/c/a3fc8051ee061e31db13e2fe011e8e0b71a7f815 (opens in a new tab)
- https://git.kernel.org/stable/c/90c4f73104016748533a5707ecd15930fbeff402 (opens in a new tab)
- https://git.kernel.org/stable/c/91784f3d77b73885e1b2e6b59d3cbf0de0a1126a (opens in a new tab)
- https://git.kernel.org/stable/c/11270e7ca268e8d61b5d9e5c3a54bd1550642c9c (opens in a new tab)
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)
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[](https://trackcve.app/cve/CVE-2022-49321)Record last updated .