CVE-2026-47337 PUBLISHED

NULL pointer dereference in Ubuntu Linux AppArmor IPv4/IPv6 socket mediation

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

Ubuntu Linux 6.8, 6.17 and 7.0 contain SAUCE patches with a possible NULL pointer dereference in the handling of AF_INET/AF_INET6 socket mediation. The bug can be triggered by an unprivileged local user. This can lead to a kernel oops.

Metrics

CVSS 3.1

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

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

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.) affected from 6.17.0 to 6.17.0-35.35 (excl.) affected from 7.0.0 to 7.0.0-22.22 (excl.)

Credits

Tristan Madani (@TristanInSec), Talence Security finder
Trevor Lawrence, _SiCk, afflicted.sh finder

References

https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/noble/commit/?id=9f03f0012a2367efae1edb4798f1c5103aeb6cbc

Problem Types

CWE-476 NULL pointer dereference CWE