CVE-2022-49321

xprtrdma: treat all calls not a bcall when bc_serv is NULL

State: Published
Severity: 7.5 High
Published: Feb 26, 2025
Updated: Aug 5, 2026
Reserved: Feb 26, 2025

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

CVSS	Score	Vector	Source
3.1	7.5 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	Linux
3.1	5.5 Medium	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H	CISA-ADP

Weaknesses

CWE-476 NULL Pointer Dereference

Affected Products

Product	Versions
LinuxLinux	63cae47005af51c937f4cdcc4835f29075add2ba to before 8e3943c50764dc7c5f25911970c3ff062ec1f18cAffected 63cae47005af51c937f4cdcc4835f29075add2ba to before 998d35a2aff4b81a1c784f3aa45cd3afff6814c1Affected 63cae47005af51c937f4cdcc4835f29075add2ba to before da99331fa62131a38a0947a8204c5208de7b0454Affected 63cae47005af51c937f4cdcc4835f29075add2ba to before 8dbae5affbdbf524b48000f9d357925bb001e5f4Affected 63cae47005af51c937f4cdcc4835f29075add2ba to before a3fc8051ee061e31db13e2fe011e8e0b71a7f815Affected 63cae47005af51c937f4cdcc4835f29075add2ba to before 90c4f73104016748533a5707ecd15930fbeff402Affected 63cae47005af51c937f4cdcc4835f29075add2ba to before 91784f3d77b73885e1b2e6b59d3cbf0de0a1126aAffected 63cae47005af51c937f4cdcc4835f29075add2ba to before 11270e7ca268e8d61b5d9e5c3a54bd1550642c9cAffected
LinuxLinux	4.4Affected before 4.4Not affected 4.14.283 through 4.14.Not affected 4.19.247 through 4.19.Not affected 5.4.198 through 5.4.Not affected 5.10.122 through 5.10.Not affected 5.15.47 through 5.15.Not affected 5.17.15 through 5.17.Not affected 5.18.4 through 5.18.*Not affected 5.19 and laterNot affected

Product

Versions

LinuxLinux

63cae47005af51c937f4cdcc4835f29075add2ba to before 8e3943c50764dc7c5f25911970c3ff062ec1f18cAffected
63cae47005af51c937f4cdcc4835f29075add2ba to before 998d35a2aff4b81a1c784f3aa45cd3afff6814c1Affected
63cae47005af51c937f4cdcc4835f29075add2ba to before da99331fa62131a38a0947a8204c5208de7b0454Affected
63cae47005af51c937f4cdcc4835f29075add2ba to before 8dbae5affbdbf524b48000f9d357925bb001e5f4Affected
63cae47005af51c937f4cdcc4835f29075add2ba to before a3fc8051ee061e31db13e2fe011e8e0b71a7f815Affected
63cae47005af51c937f4cdcc4835f29075add2ba to before 90c4f73104016748533a5707ecd15930fbeff402Affected
63cae47005af51c937f4cdcc4835f29075add2ba to before 91784f3d77b73885e1b2e6b59d3cbf0de0a1126aAffected
63cae47005af51c937f4cdcc4835f29075add2ba to before 11270e7ca268e8d61b5d9e5c3a54bd1550642c9cAffected

LinuxLinux

4.4Affected
before 4.4Not affected
4.14.283 through 4.14.*Not affected
4.19.247 through 4.19.*Not affected
5.4.198 through 5.4.*Not affected
5.10.122 through 5.10.*Not affected
5.15.47 through 5.15.*Not affected
5.17.15 through 5.17.*Not affected
5.18.4 through 5.18.*Not affected
5.19 and laterNot affected

References

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