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Vulnerability · Published Sep 20, 2021 · Assigned by mitre

CVE-2021-38300

High 7.8

In plain English

A high-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)7.8High
Exploit odds (30 days)0.6%top 51.9% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known

Official description

arch/mips/net/bpf_jit.c in the Linux kernel before 5.4.10 can generate undesirable machine code when transforming unprivileged cBPF programs, allowing execution of arbitrary code within the kernel context. This occurs because conditional branches can exceed the 128 KB limit of the MIPS architecture.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linux5.14.6-1DEBIAN-CVE-2021-38300
Debian:13linux5.14.6-1DEBIAN-CVE-2021-38300
Debian:14linux5.14.6-1DEBIAN-CVE-2021-38300
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2021-38300
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2021-38300
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2021-38300

Affected products (as reported)

VendorProductVersions
n/a n/a n/a

References