CVE-2022-49321

MEDIUM EPSS 17.9%
Published Feb 26, 20251y ago · Modified Jun 17, 20262w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Feb 26, 2025 1y ago
Last Modified Jun 17, 2026 2w ago

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 ...

CVSS Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
17.9% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-476 NULL Pointer Dereference Memory Safety

Affected Products 7

VendorProductVersionRange
linuxlinux_kernel* <4.14.283
linuxlinux_kernel*≥4.15  –  <4.19.247
linuxlinux_kernel*≥4.20  –  <5.4.198
linuxlinux_kernel*≥5.5  –  <5.10.122
linuxlinux_kernel*≥5.11  –  <5.15.47
linuxlinux_kernel*≥5.16  –  <5.17.15
linuxlinux_kernel*≥5.18  –  <5.18.4

References 8

  • git.kernel.org https://git.kernel.org/stable/c/11270e7ca268e8d61b5d9e5c3a54bd1550642c9c
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/8dbae5affbdbf524b48000f9d357925bb001e5f4
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/8e3943c50764dc7c5f25911970c3ff062ec1f18c
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/90c4f73104016748533a5707ecd15930fbeff402
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/91784f3d77b73885e1b2e6b59d3cbf0de0a1126a
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/998d35a2aff4b81a1c784f3aa45cd3afff6814c1
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/a3fc8051ee061e31db13e2fe011e8e0b71a7f815
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/da99331fa62131a38a0947a8204c5208de7b0454
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/11270e7ca268e8d61b5d9e5c3a54bd1550642c9c
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/8dbae5affbdbf524b48000f9d357925bb001e5f4
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/8e3943c50764dc7c5f25911970c3ff062ec1f18c
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/90c4f73104016748533a5707ecd15930fbeff402
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/91784f3d77b73885e1b2e6b59d3cbf0de0a1126a
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/998d35a2aff4b81a1c784f3aa45cd3afff6814c1
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/a3fc8051ee061e31db13e2fe011e8e0b71a7f815
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/da99331fa62131a38a0947a8204c5208de7b0454
    Patch