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Vulnerability · Published Mar 20, 2021 · Assigned by mitre

CVE-2020-27171

Medium 6.0

In plain English

A medium-severity security flaw in the linux package (Debian). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 48% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS NVD)6.0Medium
Exploit odds (30 days)0.6%top 52.3% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

An issue was discovered in the Linux kernel before 5.11.8. kernel/bpf/verifier.c has an off-by-one error (with a resultant integer underflow) affecting out-of-bounds speculation on pointer arithmetic, leading to side-channel attacks that defeat Spectre mitigations and obtain sensitive information from kernel memory, aka CID-10d2bb2e6b1d.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linux5.10.24-1DEBIAN-CVE-2020-27171
Debian:13linux5.10.24-1DEBIAN-CVE-2020-27171
Debian:14linux5.10.24-1DEBIAN-CVE-2020-27171
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2020-27171
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2020-27171
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2020-27171

Affected products (as reported)

VendorProductVersions
n/a n/a n/a

References