5.5

CVE-2026-47326: Memory leak in Ubuntu Linux AppArmor large notification response allocation

Analyzed
AliasesUBUNTU-CVE-2026-47326
Published 28-05-2026Last modified 28-05-2026

Vulnerability summary

CVE-2026-47326 is a medium (CVSS 5.5) vulnerability in canonical ubuntu_linux. EPSS estimates a 0.09% 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 (CVE.org)
EPSS score
0.09%
0%100%
Low · -0.04 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 SAUCE patches with a memory leak in the handling of big responses to AppArmor notifications. The bug can be triggered by an unprivileged local user. The memory leak could lead to resource exhaustion.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.09%

Chance of exploitation in the next 30 days

Percentile

1%

Versus all other CVEs

30-day change

Decrease -0.04 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.

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