Home/CVE/A flaw was found in the Framebuffer Console (fbcon) in the Linux Kernel. When providing font-width and font-height great
CVE

CVE-2023-3161

A flaw was found in the Framebuffer Console (fbcon) in the Linux Kernel. When providing font-width and font-height great

A flaw was found in the Framebuffer Console (fbcon) in the Linux Kernel. When providing font-width and font-height greater than 32 to fbcon_set_font, since there are no checks in place, a shift-out-of-bounds occurs leading to undefined behavior and possible denial of service.

MEDIUM · CVSS 5.5 EPSS 0.00013
Monitor
  • No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-1335Incorrect Bitwise Shift of Integer
CWE-682Incorrect Calculation
▤

Affected Products & Versions

4
linux kernel< 6.2
linux kernelall versions
fedoraproject fedoraall versions
redhat enterprise linuxall versions
▣

Scoring & Timeline

5.5
MEDIUM · CVSS v3.1 · secalert@redhat.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD12 Jun 2023 · 08:15 PM
CVSS VectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
no
Technical impact
partial
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
⚑

Vendor Advisories

25
rhsaRHSA-2023:6583Moderate
rhsaRHSA-2023:7077Moderate
rhsaRHSA-2023:5604Low
rhsaRHSA-2024:0412Moderate
rhsaRHSA-2023:6901Moderate
🔗

References & Sources

2
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://bugzilla.redhat.com/show_bug.cgi?id=2213485Issue TrackingPatchThird Party Advisory
https://github.com/torvalds/linux/commit/2b09d5d364986f724f17001ccfe4126b9b43a0bePatch
Intelligence Graph · click any node to traverse
CVETechnique ActorTool Family
drag to reposition · click any node to traverse · button top-right enlarges
External lookups - second-class, for what we don’t hold ourselves
NVDCVE.orgCISAVulnersExploit-DBGitHub PoCVulnCheck KEVGreyNoise
Vulnerabilities
CISA KEV catalog
CWE weaknesses
CAPEC attack patterns
Package vulnerabilities
Threat intelligence
Threat actors
Tools & malware
ATT&CK techniques
IOCs
Detection & defense
Sigma rules
YARA rules
Atomic Red Team tests
D3FEND countermeasures
Compliance
NIST 800-53
ISO 27001:2022
SOC 2 TSC
PCI-DSS v4.0
CIS Controls v8.1
About
All capabilities
Live statistics
Data sources
Privacy policy
Terms of service
threatengine.sh  ·  Open-source threat intelligence platform  ·  100+ authoritative sources  ·  Every fact traces to its origin