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Vulnerability · Published May 14, 2021 · Assigned by mitre

CVE-2021-33033

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 0.6% (higher than 47% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS NVD)7.8High
Exploit odds (30 days)0.6%top 52.6% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known

Official description

The Linux kernel before 5.11.14 has a use-after-free in cipso_v4_genopt in net/ipv4/cipso_ipv4.c because the CIPSO and CALIPSO refcounting for the DOI definitions is mishandled, aka CID-ad5d07f4a9cd. This leads to writing an arbitrary value.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
AlmaLinux:8kernel-tools-libs-devel4.18.0-348.el8ALSA-2021:4356
Debian:12linux5.10.24-1DEBIAN-CVE-2021-33033
Debian:13linux5.10.24-1DEBIAN-CVE-2021-33033
Debian:14linux5.10.24-1DEBIAN-CVE-2021-33033
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2021-33033
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2021-33033
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2021-33033

Affected products (as reported)

VendorProductVersions
n/a n/a n/a

References