Memory leak in Ubuntu Linux AppArmor large notification response allocation

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Summary

CVECVE-2026-47326
StatePUBLISHED
Assignercanonical
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-28 19:16:40 UTC
Updated2026-05-29 02:45:36 UTC
DescriptionUbuntu 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.

Risk And Classification

Primary CVSS: v3.1 5.5 MEDIUM from [email protected]

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS: 0.000130000 probability, percentile 0.021550000 (date 2026-06-01)

Problem Types: CWE-401 | CWE-401 CWE-401 Missing release of memory after effective lifetime

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary5.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
3.1CNACVSS5.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Canonical Ubuntu Linux affected 6.8.0 6.8.0-124.124 dpkg Not specified
CNA Canonical Ubuntu Linux affected 6.17.0 6.17.0-35.35 dpkg Not specified
CNA Canonical Ubuntu Linux affected 7.0.0 7.0.0-22.22 dpkg Not specified

References

ReferenceSourceLinkTags
git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/noble/commit [email protected] git.launchpad.net
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Tristan Madani (@TristanInSec), Talence Security (en)

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