CVE-2026-46191: Linux kernel · fbcon: Avoid OOB font access if console rotation fails
Affects Linux kernelSource CVE Database V5
Not known to be exploited · fixed in e4ef723d8975a2694cc90733a6b888a5e2841842 : update Linux kernel when convenient.
Data as of 6 Nov 2026, 16:34 UTC
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
Disclosed: evidence found.
CVE published 28 May 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by 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
| Product | Affected | Fixed in |
|---|---|---|
| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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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
- git.kernel.org/stable/c/b51c343a81e6e806525a4435e22532c107dd7e9d (opens in a new tab)
- git.kernel.org/stable/c/46cf3646dea54baeaa2eafe3fb1ba769947f31b0 (opens in a new tab)
- git.kernel.org/stable/c/524a6079395916fb3d790ef2bb46a1d2939b27dd (opens in a new tab)
- git.kernel.org/stable/c/594973a2e54924d8ba31c9faac669fc1ba6fcb80 (opens in a new tab)
- git.kernel.org/stable/c/ab6c34b9829d5de03f1d08a47a2253729a6e7e27 (opens in a new tab)
- git.kernel.org/stable/c/7105d9f1387d63b15c9a860674fc92c959181f2f (opens in a new tab)
- git.kernel.org/stable/c/b44cc78ff46b96e72d333a3be6aaaa0a14797263 (opens in a new tab)
- git.kernel.org/stable/c/e4ef723d8975a2694cc90733a6b888a5e2841842 (opens in a new tab)
- cert-portal.siemens.com/productcert/html/ssa-784472.html (opens in a new tab)