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VulnerabilityPublished Updated

CVE-2026-46191: Linux kernel · fbcon: Avoid OOB font access if console rotation fails

Affects Linux kernelSource CVE Database V5

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Not known to be exploited · fixed in e4ef723d8975a2694cc90733a6b888a5e2841842 : update Linux kernel when convenient.

Data as of 6 Nov 2026, 16:34 UTC

Severity
Unrated

Rated by Threat Radar · No CVSS score from NVD or the CNA

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 e4ef723d8975a2694cc90733a6b888a5e2841842, b51c343a81e6e806525a4435e22532c107dd7e9d, b44cc78ff46b96e72d333a3be6aaaa0a14797263 +5

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 28 May 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
  • ≥ 6cc50e1c5b57180fd37a31282000f43859b0fe73, < e4ef723d8975a2694cc90733a6b888a5e2841842
Fixed in
  • e4ef723d8975a2694cc90733a6b888a5e2841842
LinuxLinuxAffected
  • ≥ 6cc50e1c5b57180fd37a31282000f43859b0fe73, < b51c343a81e6e806525a4435e22532c107dd7e9d
Fixed in
  • b51c343a81e6e806525a4435e22532c107dd7e9d
LinuxLinuxAffected
  • ≥ 6cc50e1c5b57180fd37a31282000f43859b0fe73, < b44cc78ff46b96e72d333a3be6aaaa0a14797263
Fixed in
  • b44cc78ff46b96e72d333a3be6aaaa0a14797263
LinuxLinuxAffected
  • ≥ 6cc50e1c5b57180fd37a31282000f43859b0fe73, < ab6c34b9829d5de03f1d08a47a2253729a6e7e27
Fixed in
  • ab6c34b9829d5de03f1d08a47a2253729a6e7e27
LinuxLinuxAffected
  • ≥ 6cc50e1c5b57180fd37a31282000f43859b0fe73, < 594973a2e54924d8ba31c9faac669fc1ba6fcb80
Fixed in
  • 594973a2e54924d8ba31c9faac669fc1ba6fcb80
LinuxLinuxAffected
  • ≥ 6cc50e1c5b57180fd37a31282000f43859b0fe73, < 7105d9f1387d63b15c9a860674fc92c959181f2f
Fixed in
  • 7105d9f1387d63b15c9a860674fc92c959181f2f

Description

In the Linux kernel, the following vulnerability has been resolved: fbcon: Avoid OOB font access if console rotation fails Clear the font buffer if the reallocation during console rotation fails in fbcon_rotate_font(). The putcs implementations for the rotated buffer will return early in this case. See [1] for an example. Currently, fbcon_rotate_font() keeps the old buffer, which is too small for the rotated font. Printing to the rotated console with a high-enough character code will overflow the font buffer. v2: - fix typos in commit message

References

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