Invalid pointer deallocation in Ubuntu Linux AppArmor notification handling

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Summary

CVECVE-2026-47328
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 AppArmor SAUCE patches which incorrectly attempt to free a pointer which was not previously kmalloc()d, while at the same time leaking allocated memory. The bug can be triggered by an unprivileged local user and can result in the corruption of slab metadata and could lead to resource exhaustion.

Risk And Classification

Primary CVSS: v3.1 6.1 MEDIUM from [email protected]

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

Problem Types: CWE-590 | CWE-590 CWE-590 Free of memory not on the heap

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary6.1MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H
3.1CNACVSS6.1MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H

CVSS v3.1 Breakdown

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

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