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Actively exploited

CVE-2024-50302 Linux Kernel Use of Uninitialized Resource Vulnerability

The Linux kernel contains a use of uninitialized resource vulnerability that allows an attacker to leak kernel memory via a specially crafted HID report.

From the CISA KEV catalogue version 2026.11.06, with Cybergen analysis. Updated 6 Nov 2026.

Our Assessment

Should You Worry?

Patch urgentlyCybergen assessment
  • CISA confirmed exploitation in the wild and added it to the Known Exploited Vulnerabilities catalogue on 4 Mar 2025.
  • Rated Medium severity (CVSS 5.5, scored by CISA).
  • It has been in the catalogue for 612 days. Systems still unpatched now have almost certainly been scanned for it.
The Vulnerability

What It Is

In the Linux kernel, the following vulnerability has been resolved: HID: core: zero-initialize the report buffer Since the report buffer is used by all kinds of drivers in various ways, let's zero-initialize it during allocation to make sure that it can't be ever used to leak kernel memory via specially-crafted report.

Affected Versions

ProductVersions
Linux Linux27ce405039bfe6d3f4143415c638f56a3df77dca to before e7ea60184e1e88a3c9e437b3265cbb6439aa7e26
27ce405039bfe6d3f4143415c638f56a3df77dca to before 3f9e88f2672c4635960570ee9741778d4135ecf5
27ce405039bfe6d3f4143415c638f56a3df77dca to before d7dc68d82ab3fcfc3f65322465da3d7031d4ab46
27ce405039bfe6d3f4143415c638f56a3df77dca to before 05ade5d4337867929e7ef664e7ac8e0c734f1aaf
27ce405039bfe6d3f4143415c638f56a3df77dca to before 1884ab3d22536a5c14b17c78c2ce76d1734e8b0b
27ce405039bfe6d3f4143415c638f56a3df77dca to before 9d9f5c75c0c7f31766ec27d90f7a6ac673193191
Linux Linux3.12

From the public CVE record, as supplied by the vendor. Always confirm against the vendor advisory.

From Watch to Action

What To Do Now

  1. 1

    Find it

    Search your asset inventory and external attack surface for Linux Kernel. Include cloud images, appliances and anything a supplier runs for you.

    Attack Surface Management
  2. 2

    Fix it

    Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

    Vulnerability Management
  3. 3

    Hunt for compromise

    If an affected system was reachable before you patched, assume it may have been hit. Check logs, new accounts, web shells and outbound connections from the date of exposure.

    Incident Response
  4. 4

    Prove it is fixed

    Rescan or test the system after patching. Upgrades that fail silently and forgotten secondary instances are common.

    Penetration Testing

Vendor Advisories

Regulation

The Compliance Clock

Cyber EssentialsCyber Essentials requires high and critical updates (CVSS 7.0 or above) within 14 days of release. Treat any exploited flaw the same way.NIS2If exploitation causes a significant incident, essential and important entities owe their CSIRT an early warning within 24 hours and a notification within 72 hours.DORAFinancial entities must classify ICT incidents and send an initial notification for a major incident within strict deadlines, with exploited flaws a common cause.US federal (BOD 22-01)Federal civilian agencies had until 25 Mar 2025 to remediate. A sensible benchmark for everyone else.

General guidance, not legal advice. Your obligations depend on your sector, scope and jurisdiction.

Stay Ahead

More Exploited Linux Flaws

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CVE-2026-46300Linux Kernel Missing Initialization of a Variable VulnerabilityAdded 28 Oct 2026CVE-2025-39964Linux Kernel Race Condition VulnerabilityAdded 18 Sep 2026CVE-2026-53266Linux Kernel Out-of-Bounds Write VulnerabilityAdded 18 Sep 2026CVE-2025-39682Linux Kernel Improper Check for Unusual or Exceptional Conditions VulnerabilityAdded 18 Sep 2026CVE-2026-53362Linux Kernel Unspecified VulnerabilityAdded 27 Aug 2026CVE-2022-0995Linux Kernel Out-of-Bounds Write VulnerabilityAdded 26 Aug 2026

All 32 exploited Linux vulnerabilities

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Evidence

Sources

  1. CISA Known Exploited Vulnerabilities catalogue
  2. NVD: CVE-2024-50302
  3. CVE record: CVE-2024-50302
  4. FIRST EPSS
  5. source.android.com/docs/security/bulletin/2025-03-01
  6. git.kernel.org/stable/c/e7ea60184e1e88a3c9e437b3265cbb6439aa7e26
  7. git.kernel.org/stable/c/3f9e88f2672c4635960570ee9741778d4135ecf5
  8. git.kernel.org/stable/c/d7dc68d82ab3fcfc3f65322465da3d7031d4ab46
  9. git.kernel.org/stable/c/05ade5d4337867929e7ef664e7ac8e0c734f1aaf
  10. git.kernel.org/stable/c/1884ab3d22536a5c14b17c78c2ce76d1734e8b0b
  11. git.kernel.org/stable/c/9d9f5c75c0c7f31766ec27d90f7a6ac673193191
  12. git.kernel.org/stable/c/492015e6249fbcd42138b49de3c588d826dd9648