8.8

CVE-2022-49931: linux NULL Pointer Dereference

CVSS: 8.8v3.1HighModified
AliasesUBUNTU-CVE-2022-49931DEBIAN-CVE-2022-49931
Published 01-05-2025Last modified 05-08-2026
Open JSON

Vulnerability summary

CVE-2022-49931 is a high (CVSS 8.8) NULL Pointer Dereference vulnerability in linux. EPSS estimates a 0.24% chance of exploitation in the next 30 days, higher than 14.6% of scored vulnerabilities.

Overall risk
35/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.24%
0%100%
Low · +0.01 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 5 · Related 5
SUSE-SU-2025:01918-1SUSE-SU-2025:01966-1SUSE-SU-2025:01983-1SUSE-SU-2025:02173-1SUSE-SU-2025:02262-1

Timeline

  1. 01-05-2025
    PublishedVulnerability first disclosed.
  2. 05-08-2026
    Last modifiedVulnerability information updated.

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 metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.24%

Chance of exploitation in the next 30 days

Percentile

15%

Versus all other CVEs

30-day change

+0.01 pp

From 0.23% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.24%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Ubuntu108 products
  • linux< 5.4.0-139.156 | < 5.15.0-60.66
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 5.4.0-1096.104 | < 5.15.0-1030.34
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ d997d4e4365f7e59cf6b59c70f966c56d704b64f, < 25760a41e3802f54aadcc31385543665ab349b8e | ≥ d98883f6c33e0d960afedcecaa92fc2b61fec383, < 7c4260f8f188df32414a5ecad63e8b934c2aa3f0 | ≥ 13bac861952a78664907a0f927d3e874e9a59034, < ba95409d6b580501ff6d78efd00064f7df669926 | ≥ 13bac861952a78664907a0f927d3e874e9a59034, < b8bcff99b07cc175a6ee12a52db51cdd2229586c | ≥ 13bac861952a78664907a0f927d3e874e9a59034, < 1afac08b39d85437187bb2a92d89a741b1078f55 | 5d33bd6b4d4d035e42733592899918a18f2540da | ≥ 5.4.157, < 5.4.224 | ≥ 5.10.77, < 5.10.154 | ≥ 5.14.16, < 5.15 | 5.15
  • linux_kernel≥ 5.4.157, < 5.4.224 | ≥ 5.10.77, < 5.10.154 | ≥ 5.14.16, < 5.15.78 | ≥ 5.16, < 6.0.8 | 6.1:rc1 | 6.1:rc2 | 6.1:rc3
Debian1 product
  • linux< 6.0.8-1

3 vendors · 111 products

References

9 links