What’s Vulnerable › Vulnerabilities

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

• Severity: unknown
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-22 · updated 2026-10-14

Description

In the Linux kernel, the following vulnerability has been resolved: vt: add permission check for KDSKBMETA ioctl KDSKBMETA modifies keyboard meta mode but lacks the !perm check that all other keyboard setter ioctls in vt_k_ioctl() enforce, allowing a process to change meta mode on a non-controlling console without authorization.

Affected products

• Linux kernel: 2.6.12 — fixed in 7.2

How to fix

Upgrade to a fixed version: Linux kernel 7.2. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/1c5b67a1e2cb7d78dab321280f330b056e3bf437
• https://git.kernel.org/stable/c/4671c3b79e337bbae28c2d79023dc642df012bde
• https://git.kernel.org/stable/c/7bf32337a7103ccb686cbd240324bf26225ef2d6
• https://git.kernel.org/stable/c/9f8cbaf4b774694dcc292e60509762483ebfd9ae
• https://git.kernel.org/stable/c/a1c31e026c93e378e297a8df8328983d3013a59f
• https://git.kernel.org/stable/c/a7ad0034453ba4c353f9b8f810ee2569de33d283
• https://git.kernel.org/stable/c/d8ead5083b203d12b8319e7cb29cc6b8836e813f
• https://git.kernel.org/stable/c/ddc4a8303347114e945b9e6e81b81d77855f7358

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