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Findings

CVE-2026-23403

In the Linux kernel, the following vulnerability has been resolved: apparmor: fix memory leak in verify_header The function sets on every call, leaking the namespace s…

Published Apr 1, 2026 · updated Jun 17, 2026 · linux linux kernel

In the Linux kernel, the following vulnerability has been resolved: apparmor: fix memory leak in verify_header The function sets 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.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Apr 1, 2026 · NIST NVD

    Detected

    In the Linux kernel, the following vulnerability has been resolved: apparmor: fix memory leak in verify_header The function sets 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)

  2. Jun 17, 2026 · NIST NVD

    Updated

    In the Linux kernel, the following vulnerability has been resolved: apparmor: fix memory leak in verify_header The function sets 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)

Affected

  • cpe linux/linux kernelversion unspecified
  • cpe linux/linux kernel3.12

Sources

  • CVE.orgVulnerability recordCVE-2026-23403

    Official CVE identifier

    cve.org
  • NIST NVDVulnerability recordCVE-2026-23403

    In the Linux kernel, the following vulnerability has been resolved: apparmor: fix memory leak in verify_header The function sets on every call, leaking the namespace string allocated in previous iterations when multiple profiles are unpacked. This also breaks names

    nvd.nist.gov

References

CVE-2026-23403 · ZeroDay Findings