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Vulnerability · Published May 12, 2020 · Assigned by mitre

CVE-2020-12826

Medium 5.3

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 0.7% (higher than 54% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS NVD)5.3Medium
Exploit odds (30 days)0.7%top 46.5% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known

Official description

A signal access-control issue was discovered in the Linux kernel before 5.6.5, aka CID-7395ea4e65c2. Because exec_id in include/linux/sched.h is only 32 bits, an integer overflow can interfere with a do_notify_parent protection mechanism. A child process can send an arbitrary signal to a parent process in a different security domain. Exploitation limitations include the amount of elapsed time before an integer overflow occurs, and the lack of scenarios where signals to a parent process present a substantial operational threat.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
AlmaLinux:8kernel-tools-libs-devel4.18.0-240.el8ALSA-2020:4431
Debian:12linux5.6.7-1DEBIAN-CVE-2020-12826
Debian:13linux5.6.7-1DEBIAN-CVE-2020-12826
Debian:14linux5.6.7-1DEBIAN-CVE-2020-12826
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2020-12826
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2020-12826
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2020-12826
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2020-12826

Affected products (as reported)

VendorProductVersions
n/a n/a n/a

References