fbcon: Avoid OOB font access if console rotation fails
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
CVE-2026-46191
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-46191
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6cc50e1c5b57180fd37a31282000f43859b0fe73",
"lessThan": "b51c343a81e6e806525a4435e22532c107dd7e9d",
"versionType": "git"
},
{
"status": "affected",
"version": "6cc50e1c5b57180fd37a31282000f43859b0fe73",
"lessThan": "46cf3646dea54baeaa2eafe3fb1ba769947f31b0",
"versionType": "git"
},
{
"status": "affected",
"version": "6cc50e1c5b57180fd37a31282000f43859b0fe73",
"lessThan": "524a6079395916fb3d790ef2bb46a1d2939b27dd",
"versionType": "git"
},
{
"status": "affected",
"version": "6cc50e1c5b57180fd37a31282000f43859b0fe73",
"lessThan": "594973a2e54924d8ba31c9faac669fc1ba6fcb80",
"versionType": "git"
},
{
"status": "affected",
"version": "6cc50e1c5b57180fd37a31282000f43859b0fe73",
"lessThan": "ab6c34b9829d5de03f1d08a47a2253729a6e7e27",
"versionType": "git"
},
{
"status": "affected",
"version": "6cc50e1c5b57180fd37a31282000f43859b0fe73",
"lessThan": "7105d9f1387d63b15c9a860674fc92c959181f2f",
"versionType": "git"
},
{
"status": "affected",
"version": "6cc50e1c5b57180fd37a31282000f43859b0fe73",
"lessThan": "b44cc78ff46b96e72d333a3be6aaaa0a14797263",
"versionType": "git"
},
{
"status": "affected",
"version": "6cc50e1c5b57180fd37a31282000f43859b0fe73",
"lessThan": "e4ef723d8975a2694cc90733a6b888a5e2841842",
"versionType": "git"
}
],
"programFiles": [
"drivers/video/fbdev/core/fbcon_rotate.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "2.6.15"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "2.6.15",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.259",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.210",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.176",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.140",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.90",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.32",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.0.7",
"versionType": "semver",
"lessThanOrEqual": "7.0.*"
},
{
"status": "unaffected",
"version": "7.1",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/video/fbdev/core/fbcon_rotate.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-46191
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #28408 · Revision 1
- Added to Heist Feed
- Publisher date