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Vulnerability · Published Nov 28, 2020 · Assigned by mitre

CVE-2020-29368

High 7.0

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 0.4% (higher than 30% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS NVD)7.0High
Exploit odds (30 days)0.4%top 69.5% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known

Official description

An issue was discovered in __split_huge_pmd in mm/huge_memory.c in the Linux kernel before 5.7.5. The copy-on-write implementation can grant unintended write access because of a race condition in a THP mapcount check, aka CID-c444eb564fb1.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
AlmaLinux:8kernel-tools-libs-devel4.18.0-348.el8ALSA-2021:4356
Debian:12linux5.7.6-1DEBIAN-CVE-2020-29368
Debian:13linux5.7.6-1DEBIAN-CVE-2020-29368
Debian:14linux5.7.6-1DEBIAN-CVE-2020-29368
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2020-29368
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2020-29368
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2020-29368
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2020-29368

Affected products (as reported)

VendorProductVersions
n/a n/a n/a

References