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Vulnerability · Published Nov 20, 2020 · Assigned by mitre

CVE-2020-28974

Medium 5.0

In plain English

A medium-severity security flaw in the kernel-tools-libs-devel package (AlmaLinux). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 44% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS NVD)5.0Medium
Exploit odds (30 days)0.5%top 55.8% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known

Official description

A slab-out-of-bounds read in fbcon in the Linux kernel before 5.9.7 could be used by local attackers to read privileged information or potentially crash the kernel, aka CID-3c4e0dff2095. This occurs because KD_FONT_OP_COPY in drivers/tty/vt/vt.c can be used for manipulations such as font height.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
AlmaLinux:8kernel-tools-libs-devel4.18.0-305.el8ALSA-2021:1578
Debian:12linux5.9.9-1DEBIAN-CVE-2020-28974
Debian:13linux5.9.9-1DEBIAN-CVE-2020-28974
Debian:14linux5.9.9-1DEBIAN-CVE-2020-28974
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2020-28974
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2020-28974
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2020-28974

Affected products (as reported)

VendorProductVersions
n/a n/a n/a

References