CVE-2022-49931

MEDIUM EPSS 4.4%
Published May 1, 20251y ago · Modified Jun 17, 20262w ago
5.5 CVSS 3.1
Medium
Find Similar
Published May 1, 2025 1y ago
Last Modified Jun 17, 2026 2w ago

Description

In the Linux kernel, the following vulnerability has been resolved: IB/hfi1: Correctly move list in sc_disable() Commit 13bac861952a ("IB/hfi1: Fix abba locking issue with sc_disable()") incorrectly tries to move a list from one list head to another. The result is a kernel crash. The crash is triggered when a link goes down and there are waiters for a send to complete. The following signature is seen: BUG: kernel NULL pointer dereference, address: 0000000000000030 [...] Call Trace: sc_disable+0x1ba/0x240 [hfi1] pio_freeze+0x3d/0x60 [hfi1] handle_freeze+0x27/0x1b0 [hfi1] process_one_work+0x1b0/0x380 ? process_one_work+0x380/0x380 worker_thread+0x30/0x360 ? process_one_work+0x380/0x380 kthread+0xd7/0x100 ? kthread_complete_and_exit+0x20/0x20 ret_from_fork+0x1f/0x30 The fix is to use the correct call to move the list.

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
4.4% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-476 NULL Pointer Dereference Memory Safety

Affected Products 7

VendorProductVersionRange
linuxlinux_kernel*≥5.4.157  –  <5.4.224
linuxlinux_kernel*≥5.10.77  –  <5.10.154
linuxlinux_kernel*≥5.14.16  –  <5.15.78
linuxlinux_kernel*≥5.16  –  <6.0.8
linuxlinux_kernel6.1any
linuxlinux_kernel6.1any
linuxlinux_kernel6.1any

References 5

  • git.kernel.org https://git.kernel.org/stable/c/1afac08b39d85437187bb2a92d89a741b1078f55
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/25760a41e3802f54aadcc31385543665ab349b8e
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/7c4260f8f188df32414a5ecad63e8b934c2aa3f0
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b8bcff99b07cc175a6ee12a52db51cdd2229586c
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ba95409d6b580501ff6d78efd00064f7df669926
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/1afac08b39d85437187bb2a92d89a741b1078f55
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/25760a41e3802f54aadcc31385543665ab349b8e
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/7c4260f8f188df32414a5ecad63e8b934c2aa3f0
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b8bcff99b07cc175a6ee12a52db51cdd2229586c
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ba95409d6b580501ff6d78efd00064f7df669926
    Patch