CVE-2026-47336 PUBLISHED

Use of uninitialized value in Ubuntu Linux AppArmor IPv4/IPv6 socket mediation rules

Assigner: canonical
Reserved: 19.05.2026 Published: 28.05.2026 Updated: 28.05.2026

Ubuntu Linux 6.8 contains SAUCE patches with a possible use of an uninitialized variable in AppArmor AF_INET/AF_INET6 socket mediation code. The bug can be triggered by an unprivileged local user and could result in incorrect fine-grained mediation of network sockets.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
CVSS Score: 3.3

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

CVSS 3.1

Product Status

Vendor	Canonical
Product	Ubuntu Linux
Versions	Default: unaffected affected from 6.8.0 to 6.8.0-124.124 (excl.)

Credits

Tristan Madani (@TristanInSec), Talence Security finder

References

https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/noble/commit/?id=f37c6a70fe7b435322c334554002809a4e7b7293

Problem Types

CWE-457 Use of uninitialized variable CWE