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CVE-2026-47326

Memory leak in Ubuntu Linux AppArmor large notification response allocation

MEDIUM
5.5
CVSS Score
Published: May 28, 2026 at 06:26 PM UTC
Updated: October 26, 2026 at 01:10 PM UTC
1 product affected across 1 vendorUbuntu Linux

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Severity
MEDIUM5.5
Exploit prediction
EPSS 0.1%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Ubuntu Linux· Canonicalrubygems
95%
24.0425.1026.046.17.06.8.07.0.0
Affected range stops below 6.17.0-35.35, so it looks safe — our inference, not a vendor statement
Affected range stops below 6.8.0-124.124, so it looks safe — our inference, not a vendor statement
Affected range stops below 7.0.0-22.22, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

Patch
Source: cverecord
https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/noble/commit/?id=8d858ecb7e2e216ca2987302a04c266f2355fefe

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.5MEDIUMcanonical
Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-401

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