CVE-2026-46191

fbcon: Avoid OOB font access if console rotation fails

At a glance

Severity
Not available
EPSS
EPSS 0.14 % · percentile 3 (2026-10-28)
State
PUBLISHED
Published
Updated
Assigner
Linux
NVD status
Modified

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

Scores

VersionScoreVectorScored by
CVSS 3.1HIGH 7.1CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:HNVD · nvd@nist.gov (Primary)

Weaknesses (CWE)

European references

CERT-FR advisories

Affected configurations (NVD CPE)

Affected products

ProductVersions
Linux · Linuxaffected 6cc50e1c5b57180fd37a31282000f43859b0fe73 < b51c343a81e6e806525a4435e22532c107dd7e9d ; affected 6cc50e1c5b57180fd37a31282000f43859b0fe73 < 46cf3646dea54baeaa2eafe3fb1ba769947f31b0 ; affected 6cc50e1c5b57180fd37a31282000f43859b0fe73 < 524a6079395916fb3d790ef2bb46a1d2939b27dd ; affected 6cc50e1c5b57180fd37a31282000f43859b0fe73 < 594973a2e54924d8ba31c9faac669fc1ba6fcb80 ; affected 6cc50e1c5b57180fd37a31282000f43859b0fe73 < ab6c34b9829d5de03f1d08a47a2253729a6e7e27 ; affected 6cc50e1c5b57180fd37a31282000f43859b0fe73 < 7105d9f1387d63b15c9a860674fc92c959181f2f
Linux · Linuxaffected 2.6.15 ; unaffected 0 < 2.6.15 ; unaffected 5.10.259 ≤ 5.10.* ; unaffected 5.15.210 ≤ 5.15.* ; unaffected 6.1.176 ≤ 6.1.* ; unaffected 6.6.140 ≤ 6.6.*

References

Sources

SourceLicence
CVE List (CVEProject cvelistV5)CVE Program Terms of Use
EPSS (FIRST.org)FIRST — attribution requested
ENISA EUVDENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feedsPublic domain — this product uses data from the NVD API but is not endorsed or certified by the NVD