5.5

CVE-2026-47334: Deadlock or kernel panic in Ubuntu Linux AppArmor notification handling

Analyzed
AliasesUBUNTU-CVE-2026-47334
Published 28-05-2026Last modified 28-05-2026

Vulnerability summary

CVE-2026-47334 is a medium (CVSS 5.5) Deadlock vulnerability in canonical ubuntu_linux. EPSS estimates a 0.08% chance of exploitation in the next 30 days, higher than 0.1% 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 (CVE.org)
EPSS score
0.08%
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 11 · Related 11
USN-8370-1USN-8371-1USN-8373-1USN-8374-1USN-8393-1USN-8440-1

Timeline

  1. 28-05-2026
    PublishedVulnerability first disclosed.
  2. 28-05-2026
    Last modifiedVulnerability information updated.

Description

Ubuntu Linux 6.8, 6.17 and 7.0 contain AppArmor SAUCE patches which incorrectly sleep while holding a spinlock in notification handling code. The bug can be triggered by an unprivileged local user and can result in kernel panic or deadlock.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.08%

Chance of exploitation in the next 30 days

Percentile

0%

Versus all other CVEs

30-day change

Decrease -0.03 pp

From 0.10% 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.

Ubuntu129 products
  • linux< 6.8.0-124.124 | < 6.17.0-35.35 | < 7.0.0-22.22
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 6.8.0-1057.60 | < 6.17.0-1017.17 | < 7.0.0-1006.6
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Canonical1 product
  • ubuntu_linuxEOL≥ 6.8.0, < 6.8.0-124.124 | ≥ 6.17.0, < 6.17.0-35.35 | ≥ 7.0.0, < 7.0.0-22.22 | 24.04 | 25.10 | 26.04

2 vendors · 130 products

References

14 links
Show all 14 references