CVE-2026-23403

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2026-23403
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.

5.5 /10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

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

Configuration 1 (hide)

OR cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:3.12:-:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc5:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc6:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc7:*:*:*:*:*:*
History

24 Apr 2026, 18:39

Type Values Removed Values Added
References () https://git.kernel.org/stable/c/42fd831abfc15d0643c14688f0522556b347e7e6 - () https://git.kernel.org/stable/c/42fd831abfc15d0643c14688f0522556b347e7e6 - Patch
References () https://git.kernel.org/stable/c/4f0889f2df1ab99224a5e1ac4e20437eea5fe38e - () https://git.kernel.org/stable/c/4f0889f2df1ab99224a5e1ac4e20437eea5fe38e - Patch
References () https://git.kernel.org/stable/c/663ce34786e759ebcbeb3060685c20bcc886d51a - () https://git.kernel.org/stable/c/663ce34786e759ebcbeb3060685c20bcc886d51a - Patch
References () https://git.kernel.org/stable/c/6b79abcb3c985e153fcf9d395e1d4336081aabc2 - () https://git.kernel.org/stable/c/6b79abcb3c985e153fcf9d395e1d4336081aabc2 - Patch
References () https://git.kernel.org/stable/c/786e2c2a87d9c505f33321d1fd23a176aa8ddeb1 - () https://git.kernel.org/stable/c/786e2c2a87d9c505f33321d1fd23a176aa8ddeb1 - Patch
References () https://git.kernel.org/stable/c/9d678eb0fe55c9195d9a253e8c5b82a87b930737 - () https://git.kernel.org/stable/c/9d678eb0fe55c9195d9a253e8c5b82a87b930737 - Patch
References () https://git.kernel.org/stable/c/bcf82c0c5a8b383fd2d5d8f3fd880cdcab2ac557 - () https://git.kernel.org/stable/c/bcf82c0c5a8b383fd2d5d8f3fd880cdcab2ac557 - Patch
References () https://git.kernel.org/stable/c/e38c55d9f834e5b848bfed0f5c586aaf45acb825 - () https://git.kernel.org/stable/c/e38c55d9f834e5b848bfed0f5c586aaf45acb825 - Patch
CWE CWE-401
CPE cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc6:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc7:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:3.12:-:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc5:*:*:*:*:*:*
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 5.5
First Time Linux
Linux linux Kernel

18 Apr 2026, 09:16

Type Values Removed Values Added
References
  • () https://git.kernel.org/stable/c/6b79abcb3c985e153fcf9d395e1d4336081aabc2 -
  • () https://git.kernel.org/stable/c/9d678eb0fe55c9195d9a253e8c5b82a87b930737 -
  • () https://git.kernel.org/stable/c/bcf82c0c5a8b383fd2d5d8f3fd880cdcab2ac557 -

01 Apr 2026, 09:16

Type Values Removed Values Added
New CVE
Information

Published : 2026-04-01 09:16

Updated : 2026-04-24 18:39

NVD link : CVE-2026-23403

Mitre link : CVE-2026-23403

CVE.ORG link : CVE-2026-23403

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
CWE-401

Missing Release of Memory after Effective Lifetime