High severity7.1NVD Advisory· Published May 28, 2026· Updated Oct 15, 2026
CVE-2026-46191
CVE-2026-46191
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
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
18- osv-coords15 versionspkg:rpm/opensuse/kernel-obs-build&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/dtb-aarch64&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-kvmsmall&distro=openSUSE%20Leap%2016.0pkg:linux/kernelpkg:rpm/opensuse/kernel-64kb&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-azure&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-default&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-docs&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-obs-qa&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-zfcpdump&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-source&distro=openSUSE%20Tumbleweedpkg:rpm/opensuse/kernel-default-base&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-rt&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-source&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-syms&distro=openSUSE%20Leap%2016.0
< 6.12.0-160000.37.1+ 14 more
- (no CPE)range: < 6.12.0-160000.37.1
- (no CPE)range: < 6.12.0-160000.37.1
- (no CPE)range: < 6.12.0-160000.37.1
- (no CPE)range: >= 2.6.15, < 5.10.259
- (no CPE)range: < 6.12.0-160000.37.1
- (no CPE)range: < 6.12.0-160000.37.1
- (no CPE)range: < 6.12.0-160000.37.1
- (no CPE)range: < 6.12.0-160000.37.1
- (no CPE)range: < 6.12.0-160000.37.1
- (no CPE)range: < 6.12.0-160000.37.1
- (no CPE)range: < 7.0.11-1.1
- (no CPE)range: < 6.12.0-160000.37.1.160000.2.19
- (no CPE)range: < 6.12.0-160000.37.1
- (no CPE)range: < 6.12.0-160000.37.1
- (no CPE)range: < 6.12.0-160000.37.1
Patches
Vulnerability mechanics
References
9- git.kernel.org/stable/c/594973a2e54924d8ba31c9faac669fc1ba6fcb80nvdPatch
- git.kernel.org/stable/c/7105d9f1387d63b15c9a860674fc92c959181f2fnvdPatch
- git.kernel.org/stable/c/ab6c34b9829d5de03f1d08a47a2253729a6e7e27nvdPatch
- git.kernel.org/stable/c/b44cc78ff46b96e72d333a3be6aaaa0a14797263nvdPatch
- git.kernel.org/stable/c/e4ef723d8975a2694cc90733a6b888a5e2841842nvdPatch
- cert-portal.siemens.com/productcert/html/ssa-784472.htmlnvd
- git.kernel.org/stable/c/46cf3646dea54baeaa2eafe3fb1ba769947f31b0nvd
- git.kernel.org/stable/c/524a6079395916fb3d790ef2bb46a1d2939b27ddnvd
- git.kernel.org/stable/c/b51c343a81e6e806525a4435e22532c107dd7e9dnvd
News mentions
1- Siemens SIMATIC S7-1500 TM MFPCISA ICS Advisories