VulnSocial

CVE-2026-23403General(linux / linux_kernel)

LOWCVSS 5.5 · MEDIUM

Signal is active with 2 mentions in latest observed window

Immediate actions

  • Patch linux linux_kernel systems immediately

Recommended action window: Monitor and triage in normal cycle

NVD 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.

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0.5/ 10 priority

Sources & remediation

Patch / fix
Weakness type (CWE)
CWE-401

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

AVAILABLE

Momentum

NONE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

  • linux_kernel

Threat summary

  • Patch or workaround signal is available
  • 2 mentions across 1 observed day

What's happening

  • Patch or workaround mentioned in 1 signal
  • Technical details provided in 1 signal
  • General: 1 classified signal
  • 2 total mentions across 1 day

Affected systems

Vendors
linux
Products
linux_kernel

2 versions affected across 1 product

Deep dive

Activity timeline2 mentions / 1d
01122Mentions · 2026-04-01: 2Patch / Workaround · 2026-04-01: 1Technical Details · 2026-04-01: 104-01
Signal classification2 categories
General
150.0%
Patch
150.0%
Referenced assets3 URLs
Full discourse2 posts
  • Vulmon Vulnerability Feed@VulmonFeeds
    General

    CVE-2026-23403 In the Linux kernel, the following vulnerability has been resolve... https://vulmon.com/vulnerabilitydetails?qid=CVE-2026-23403 Customizable Vulnerability Alerts: https://alerts.vulmon.com/?utm_source=twitter&utm_medium=social&utm_campaign=2102281&utm_content=4

    Post summary

    A brief notice referencing CVE-2026-23403 with a link to vulnerability details, but no additional technical context or exploitation information.

    0000144
    4.0K followersView on X
  • CVE@CVEnew
    Patch

    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… https://www.cve.org/CVERecord?id=CVE-2026-23403

    Post summary

    CVE‑2026‑23403, a memory‑leak issue in AppArmor’s verify_header function, has been fixed; the text confirms a fix was applied but provides no detailed patch notes.

    0000077
    56.9K followersView on X
CPE platform detail9 entries

9 of 9 entries

PartVendorProductVersionTarget SWTarget HW
OSlinuxlinux_kernel---
OSlinuxlinux_kernel3.12--
OSlinuxlinux_kernel7.0--
OSlinuxlinux_kernel7.0--
OSlinuxlinux_kernel7.0--
OSlinuxlinux_kernel7.0--
OSlinuxlinux_kernel7.0--
OSlinuxlinux_kernel7.0--
OSlinuxlinux_kernel7.0--

Explore more

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