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Vulnerability · Published Apr 19, 2021 · Assigned by redhat

CVE-2021-3506

High 7.1

In plain English

A high-severity out-of-bounds read in kernel. 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 31% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS NVD)7.1High
Exploit odds (30 days)0.4%top 69.0% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known

Official description

An out-of-bounds (OOB) memory access flaw was found in fs/f2fs/node.c in the f2fs module in the Linux kernel in versions before 5.12.0-rc4. A bounds check failure allows a local attacker to gain access to out-of-bounds memory leading to a system crash or a leak of internal kernel information. The highest threat from this vulnerability is to system availability.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linux5.10.38-1DEBIAN-CVE-2021-3506
Debian:13linux5.10.38-1DEBIAN-CVE-2021-3506
Debian:14linux5.10.38-1DEBIAN-CVE-2021-3506
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2021-3506
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2021-3506
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2021-3506

Affected products (as reported)

VendorProductVersions
n/a kernel kernel 5.12.0-rc4

Weakness: CWE-125

References