5.5

CVE-2026-31480: tracing: Fix potential deadlock in cpu hotplug with osnoise

Analyzed
AliasesUBUNTU-CVE-2026-31480DEBIAN-CVE-2026-31480
Published 22-04-2026Last modified 11-05-2026

Vulnerability summary

CVE-2026-31480 is a medium (CVSS 5.5) Improper Locking vulnerability in linux. EPSS estimates a 0.10% chance of exploitation in the next 30 days, higher than 0.5% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 5.5, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
5.5/10
010
Medium · v3.1 (NVD)
EPSS score
0.10%
0%100%
Low · -0.03 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 39 · Related 37
MGASA-2026-0108MGASA-2026-0110SUSE-SU-2026:22043-1SUSE-SU-2026:22048-1SUSE-SU-2026:22076-1SUSE-SU-2026:22087-1

Timeline

  1. 22-04-2026
    PublishedVulnerability first disclosed.
  2. 11-05-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: tracing: Fix potential deadlock in cpu hotplug with osnoise The following sequence may leads deadlock in cpu hotplug: task1 task2 task3 ----- ----- ----- mutex_lock(&interface_lock) [CPU GOING OFFLINE] cpus_write_lock(); osnoise_cpu_die(); kthread_stop(task3); wait_for_completion(); osnoise_sleep(); mutex_lock(&interface_lock); cpus_read_lock(); [DEAD LOCK] Fix by swap the order of cpus_read_lock() and mutex_lock(&interface_lock).

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.10%

Chance of exploitation in the next 30 days

Percentile

1%

Versus all other CVEs

30-day change

Decrease -0.03 pp

From 0.13% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu145 products
  • linux< 5.15.0-186.196 | < 6.8.0-136.136 | All versions (No fix recorded)
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 5.15.0-1112.119 | < 6.8.0-1061.64 | All versions (No fix recorded)
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ bce29ac9ce0bb0b0b146b687ab978378c21e9078, < cf929c21eeed5bd39873fb14bfdfff963fa6f1da | ≥ bce29ac9ce0bb0b0b146b687ab978378c21e9078, < 7aa095ce7d224308cb6979956f0de8607df93d4f | ≥ bce29ac9ce0bb0b0b146b687ab978378c21e9078, < ef41a85a55022e27cdaebf22a6676910b66f65aa | ≥ bce29ac9ce0bb0b0b146b687ab978378c21e9078, < 03474a01c199de17a8e2d39b51df6beb9c76e831 | ≥ bce29ac9ce0bb0b0b146b687ab978378c21e9078, < f278b8ebf7eba2a1699cfc7bf30dd3ef898d60d7 | ≥ bce29ac9ce0bb0b0b146b687ab978378c21e9078, < 7a41d4633cd2c15eb5ed31e8f3b16910e50a8c9f | ≥ bce29ac9ce0bb0b0b146b687ab978378c21e9078, < 1f9885732248d22f788e4992c739a98c88ab8a55 | 5.14
  • linux_kernelEOL≥ 5.14.1, < 5.15.203 | ≥ 5.16, < 6.1.168 | ≥ 6.2, < 6.6.131 | ≥ 6.7, < 6.12.80 | ≥ 6.13, < 6.18.21 | ≥ 6.19, < 6.19.11 | 5.14 | 7.0:rc1 | 7.0:rc2 | 7.0:rc3 | 7.0:rc4 | 7.0:rc5 | 7.0:rc6 | 7.0:rc7
Debian1 product
  • linux< 6.1.170-1 | < 6.12.85-1 | < 6.19.11-1

3 vendors · 148 products

References

38 links
Show all 38 references