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Vulnerability · Published Dec 9, 2020 · Assigned by mitre

CVE-2020-29661

High 7.8

In plain English

A high-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 1.1% (higher than 66% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code. Fixed versions are available - upgrade the affected package.

Severity (CVSS NVD)7.8High
Exploit odds (30 days)1.1%top 33.7% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack tooling1Public PoC

Official description

A locking issue was discovered in the tty subsystem of the Linux kernel through 5.9.13. drivers/tty/tty_jobctrl.c allows a use-after-free attack against TIOCSPGRP, aka CID-54ffccbf053b.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
AlmaLinux:8kernel-tools-libs-devel4.18.0-240.15.1.el8_3ALSA-2021:0558
Debian:12linux5.9.15-1DEBIAN-CVE-2020-29661
Debian:13linux5.9.15-1DEBIAN-CVE-2020-29661
Debian:14linux5.9.15-1DEBIAN-CVE-2020-29661
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2020-29661
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2020-29661
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2020-29661

Affected products (as reported)

VendorProductVersions
n/a n/a n/a

References