NVD / CVE Program· CNA Linux

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

Noroxi assessment

Priority: Monitor (action score 28/100)

The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
Probability of exploitation in the next 30 days: 0.13% (FIRST EPSS).
Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
Fixed version: Linux Linux 46cf3646dea54baeaa2eafe3fb1ba769947f31b0, 524a6079395916fb3d790ef2bb46a1d2939b27dd, 594973a2e54924d8ba31c9faac669fc1ba6fcb80; azl3 kernel 6.6.139.1-1 on Azure Linux 3.0 6.6.141.1-1.
Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 46cf3646dea54baeaa2eafe3fb1ba769947f31b0, 524a6079395916fb3d790ef2bb46a1d2939b27dd, 594973a2e54924d8ba31c9faac669fc1ba6fcb80; azl3 kernel 6.6.139.1-1 on Azure Linux 3.0 6.6.141.1-1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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

HighCVSS 7.1 · v3.1—No exploit Fix available

Memory safety

BDU:2026-13842

Published: May 28, 2026
Updated: Oct 15, 2026
EPSS: 0.1% · 3th percentile
CWE: CWE-125

Report tools

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Action score

Monitor

Low priority for now.

CVSS: 28 / 40 · 7.1 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 0 / 30 · 0.1%

Get told when this record changes

Not in KEV: no record of exploitation in the wild
No public exploit code on record
A fix has been released

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Noroxi analysis

What does it mean in your environment?

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

Vendor	Product	CPE
linux	linux kernel	cpe:2.3:o:linux:linux_kernel

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

linux linux kernel2.6.15 and later · before 6.6.140
linux linux kernel6.7 and later · before 6.12.90
linux linux kernel6.13 and later · before 6.18.32
linux linux kernel6.19 and later · before 7.0.7

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

Linux Linux
- 2.6.15affected
- 6cc50e1c5b57180fd37a31282000f43859b0fe73 and later · before b51c343a81e6e806525a4435e22532c107dd7e9daffected · git
- 6cc50e1c5b57180fd37a31282000f43859b0fe73 and later · before 46cf3646dea54baeaa2eafe3fb1ba769947f31b0affected · git
- 6cc50e1c5b57180fd37a31282000f43859b0fe73 and later · before 524a6079395916fb3d790ef2bb46a1d2939b27ddaffected · git
- 6cc50e1c5b57180fd37a31282000f43859b0fe73 and later · before 594973a2e54924d8ba31c9faac669fc1ba6fcb80affected · git
- 6cc50e1c5b57180fd37a31282000f43859b0fe73 and later · before ab6c34b9829d5de03f1d08a47a2253729a6e7e27affected · git
- 6cc50e1c5b57180fd37a31282000f43859b0fe73 and later · before 7105d9f1387d63b15c9a860674fc92c959181f2faffected · git
- 6cc50e1c5b57180fd37a31282000f43859b0fe73 and later · before b44cc78ff46b96e72d333a3be6aaaa0a14797263affected · git
- 6cc50e1c5b57180fd37a31282000f43859b0fe73 and later · before e4ef723d8975a2694cc90733a6b888a5e2841842affected · git
- before 2.6.15not affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

Ecosystem	Package	Affected range	Fix
Debian:12	linux	before 6.1.176-1	6.1.176-1
Debian:13	linux	before 6.12.90-1	6.12.90-1
Debian:14	linux	before 7.0.7-1	7.0.7-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

CVE-2026-31431crypto: algif_aead - Revert to operating out-of-placeKEV
90Now
CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe KEV
89Now
CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV
85Now

Published before and after this one in the same product

← EarlierCVE-2026-46187May 28, 2026 · wifi: rsi: fix kthread lifetime race between self-exit and external-stop
18Monitor
← EarlierCVE-2026-46190May 28, 2026 · mtd: spi-nor: debugfs: fix out-of-bounds read in spi_nor_params_show()
28Monitor
Later →CVE-2026-46193May 28, 2026 · xfrm: ah: account for ESN high bits in async callbacks
22Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / package	Fixed version	Source
Linux Linux	46cf3646dea54baeaa2eafe3fb1ba769947f31b0	Vendor (CNA)
Linux Linux	524a6079395916fb3d790ef2bb46a1d2939b27dd	Vendor (CNA)
Linux Linux	594973a2e54924d8ba31c9faac669fc1ba6fcb80	Vendor (CNA)
Linux Linux	7105d9f1387d63b15c9a860674fc92c959181f2f	Vendor (CNA)
Linux Linux	ab6c34b9829d5de03f1d08a47a2253729a6e7e27	Vendor (CNA)
Linux Linux	b44cc78ff46b96e72d333a3be6aaaa0a14797263	Vendor (CNA)
Linux Linux	b51c343a81e6e806525a4435e22532c107dd7e9d	Vendor (CNA)
Linux Linux	e4ef723d8975a2694cc90733a6b888a5e2841842	Vendor (CNA)
azl3 kernel 6.6.139.1-1 on Azure Linux 3.0	6.6.141.1-1 · CBL-Mariner Releases	Microsoft (MSRC)
debian:linux	6.1.176-1 · Debian:12	Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).