PT-2026-29486 · Linux+2 · Linux Kernel+2

Published

2026-04-01

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Updated

2026-05-11

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CVE-2026-23403

CVSS v3.1

5.5

Medium

VectorAV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)
Description The Linux kernel contained a memory leak in the verify header function within the AppArmor subsystem. The function incorrectly set *ns to NULL on each call, leading to a memory leak of the namespace string allocated in previous iterations when multiple profiles were unpacked. This also disrupted namespace consistency checking as *ns was consistently NULL during comparison. The issue was resolved by removing the incorrect assignment, relying on the caller (aa unpack) to initialize *ns to NULL before the loop.
Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Memory Leak

Weakness Enumeration

CWE-401

Related Identifiers

CVE-2026-23403
OESA-2026-1862
OESA-2026-1863
OESA-2026-1864
USN-8098-10
USN-8152-1
USN-8163-1
USN-8163-2
USN-8164-1
USN-8165-1
USN-8201-1
USN-8224-1
USN-8243-1
USN-8261-1
USN-8266-1
USN-8267-1

Affected Products

Linuxmint
Linux Kernel
Ubuntu