CVE-2026-23403

MEDIUM EPSS 7.4%
Published Apr 1, 20263mo ago · Modified Jun 17, 20262w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Apr 1, 2026 3mo ago
Last Modified Jun 17, 2026 2w ago

Description

In the Linux kernel, the following vulnerability has been resolved: apparmor: fix memory leak in verify_header The function sets `*ns = NULL` on every call, leaking the namespace string allocated in previous iterations when multiple profiles are unpacked. This also breaks namespace consistency checking since *ns is always NULL when the comparison is made. Remove the incorrect assignment. The caller (aa_unpack) initializes *ns to NULL once before the loop, which is sufficient.

CVSS Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
7.4% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-401

Affected Products 15

VendorProductVersionRange
linuxlinux_kernel*≥3.12.1  –  <5.10.253
linuxlinux_kernel*≥5.11  –  <5.15.203
linuxlinux_kernel*≥5.16  –  <6.1.169
linuxlinux_kernel*≥6.2  –  <6.6.130
linuxlinux_kernel*≥6.7  –  <6.12.77
linuxlinux_kernel*≥6.13  –  <6.18.18
linuxlinux_kernel*≥6.19  –  <6.19.8
linuxlinux_kernel3.12any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any

References 8

  • git.kernel.org https://git.kernel.org/stable/c/42fd831abfc15d0643c14688f0522556b347e7e6
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/4f0889f2df1ab99224a5e1ac4e20437eea5fe38e
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/663ce34786e759ebcbeb3060685c20bcc886d51a
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/6b79abcb3c985e153fcf9d395e1d4336081aabc2
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/786e2c2a87d9c505f33321d1fd23a176aa8ddeb1
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/9d678eb0fe55c9195d9a253e8c5b82a87b930737
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/bcf82c0c5a8b383fd2d5d8f3fd880cdcab2ac557
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e38c55d9f834e5b848bfed0f5c586aaf45acb825
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/42fd831abfc15d0643c14688f0522556b347e7e6
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/4f0889f2df1ab99224a5e1ac4e20437eea5fe38e
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/663ce34786e759ebcbeb3060685c20bcc886d51a
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/6b79abcb3c985e153fcf9d395e1d4336081aabc2
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/786e2c2a87d9c505f33321d1fd23a176aa8ddeb1
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/9d678eb0fe55c9195d9a253e8c5b82a87b930737
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/bcf82c0c5a8b383fd2d5d8f3fd880cdcab2ac557
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e38c55d9f834e5b848bfed0f5c586aaf45acb825
    Patch