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VulnerabilityPublished Updated

CVE-2026-74676: Linux kernel · vt: add permission check for KDSKBMETA ioctl

Affects Linux kernelSource CVE Database V5

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Not known to be exploited · fixed in ddc4a8303347114e945b9e6e81b81d77855f7358 : update Linux kernel when convenient.

Data as of 6 Nov 2026, 17:48 UTC

Severity
Low

Rated Low by Threat Radar's AI analysis · CVSS not yet scored by NVD

Thin evidence

One scorer or none
CISA SSVC
Exploitation
No evidence of active exploitation and no public proof of concept
Automatable
Attackers cannot reliably automate steps 1–4 of the kill chain
Technical impact
Limited control over the software or limited information exposure

CISA SSVC assessment, 2026-11-06.

Patch
Available – fixed in ddc4a8303347114e945b9e6e81b81d77855f7358, d8ead5083b203d12b8319e7cb29cc6b8836e813f, a7ad0034453ba4c353f9b8f810ee2569de33d283 +5

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 22 Aug 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 6 Nov 2026.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

ProductAffectedFixed in
LinuxLinuxAffected
  • ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < ddc4a8303347114e945b9e6e81b81d77855f7358
Fixed in
  • ddc4a8303347114e945b9e6e81b81d77855f7358
LinuxLinuxAffected
  • ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < d8ead5083b203d12b8319e7cb29cc6b8836e813f
Fixed in
  • d8ead5083b203d12b8319e7cb29cc6b8836e813f
LinuxLinuxAffected
  • ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < a7ad0034453ba4c353f9b8f810ee2569de33d283
Fixed in
  • a7ad0034453ba4c353f9b8f810ee2569de33d283
LinuxLinuxAffected
  • ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < a1c31e026c93e378e297a8df8328983d3013a59f
Fixed in
  • a1c31e026c93e378e297a8df8328983d3013a59f
LinuxLinuxAffected
  • ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 4671c3b79e337bbae28c2d79023dc642df012bde
Fixed in
  • 4671c3b79e337bbae28c2d79023dc642df012bde
LinuxLinuxAffected
  • ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 9f8cbaf4b774694dcc292e60509762483ebfd9ae
Fixed in
  • 9f8cbaf4b774694dcc292e60509762483ebfd9ae

AI-suggested

A fix is available and has been applied in the Linux kernel. Users and administrators should update to the fixed kernel versions identified by the provided commit hashes to remediate this issue.

Description

A vulnerability in the Linux kernel's virtual terminal (vt) subsystem allowed unauthorized processes to change the keyboard meta mode on non-controlling consoles due to a missing permission check in the KDSKBMETA ioctl handler. This flaw was fixed by adding the appropriate permission check to prevent unauthorized access.

References

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