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CVE-2026-53378 medium CVSS 5.5

Vulnerability in Linux kernel (CVE-2026-53378)

Summary

Vulnerability in Linux kernel (CVE-2026-53378). Risk of unauthorized operations or information disclosure.

Original description

The description as published by the source.

In the Linux kernel, the following vulnerability has been resolved:

drm/colorop: Fix blob property reference tracking in state lifecycle

The colorop state blob property handling had memory leaks during state
duplication, destruction, and reset operations. The implementation
failed to follow the established pattern from drm_crtc's handling of
DEGAMMA/GAMMA blob properties.

Issues fixed:

  • drm_colorop_atomic_destroy_state() was freeing state memory without
    releasing the blob reference, causing a leak
  • drm_colorop_reset() was directly freeing old state with kfree()
    instead of properly destroying it, leaking blob references
  • drm_colorop_cleanup() had duplicate blob cleanup code

Changes:

  • Add __drm_atomic_helper_colorop_destroy_state() helper to properly
    release blob references before freeing state memory
  • Update drm_colorop_atomic_destroy_state() to call the helper
  • Fix drm_colorop_reset() to use drm_colorop_atomic_destroy_state()
    for proper cleanup of old state
  • Simplify drm_colorop_cleanup() to use the common destruction path

This matches the well-tested pattern used by drm_crtc since 2016 and
ensures proper reference counting throughout the state lifecycle.

Co-developed by Claude Sonnet 4.5.

Source: GitHub Security Advisories (Global) NVD GitHub Advisory

Auto-generated summary

Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.

A vulnerability tracked as CVE-2026-53378 has been found in Linux kernel.
Risk of unauthorized operations or information disclosure. CVSS score: 5.5/10.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "Linux kernel CVE-2026-53378" on the vendor's site.

CVE-2026-53378 (Linux kernel) — CWE-401 / CVSS v3 5.5
Attack vector: local / no user interaction
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.

❓ What is the problem

A vulnerability (CWE-401) exists in Linux kernel.

📍 Affected scope

Check the vendor advisory for the affected versions of Linux kernel.

🔥 Severity

Severity: Medium (CVSS 5.5/10). Risk of unauthorized operations or information disclosure.

🔧 How to fix

Update to the patched release per vendor advisory.

🛡️ Workaround

Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.

🔍 Detection

Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Audit SBOM/dependencies to find affected services.

Response actions

Concrete steps and command examples for SOC/SRE teams to execute in order

  1. 1
    Identify exposure identify 
    Audit SBOM/dependencies for affected components.

    資産台帳・SBOM・依存マニフェストで Linux kernel を使っているサービスとバージョンを洗い出す。

  2. 2
    Post-deployment verification verify 
    Confirm patched version is live in production

    パッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。

Affected packages

Linux Kernel
[{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.0.9"}]}]

Fix status by distribution

Fixed packages published by each distribution for this CVE

References

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