CVE-2023-3161: fedoraproject fedora Incorrect Bitwise Shift of Integer
Vulnerability summary
CVE-2023-3161 is a medium (CVSS 5.5) Incorrect Bitwise Shift of Integer vulnerability in fedoraproject fedora. EPSS estimates a 0.20% chance of exploitation in the next 30 days, higher than 10.4% of scored vulnerabilities.
Not severe (CVSS 5.5, local access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 24 · Related 18Timeline
- 12-06-2023PublishedVulnerability first disclosed.
- 11-03-2025Last modifiedVulnerability information updated.
Description
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.
CVSS metrics
5 scores · 4 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- NVDNIST5.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
0.20%
Chance of exploitation in the next 30 days
Percentile
10%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.20% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root cause- CWE-1335Incorrect Bitwise Shift of IntegerAn integer value is specified to be shifted by a negative amount or an amount greater than or equal to the number of bits contained in the value.
- CWE-682Incorrect CalculationThe product performs a calculation that generates incorrect or unintended results that are later used in security-critical decisions or resource management.
Affected systems
Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.
Ubuntu96 products
- linuxAll versions (No fix recorded) | < 4.4.0-243.277 | < 4.15.0-211.222 | < 5.4.0-149.166 | < 5.15.0-72.79
- linux-allwinner-5.19All versions (No fix recorded)
- linux-aws< 4.4.0-1121.127 | < 4.4.0-1159.174 | < 4.15.0-1156.169 | < 5.4.0-1102.110 | < 5.15.0-1036.40
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.11All versions (No fix recorded)
Debian1 product
- linux< 6.1.11-1
Fedoraproject1 product
- fedoraEOL38
Linux1 product
- linux_kernel< 6.2 | 6.2:rc1 | 6.2:rc2 | 6.2:rc3 | 6.2:rc4 | 6.2:rc5 | 6.2:rc6
Redhat1 product
- enterprise_linux8.0 | 9.0
5 vendors · 100 products
