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Vulnerability · Published Mar 25, 2022 · Assigned by redhat

CVE-2021-4202

High 7.0

In plain English

A high-severity race condition 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)7.0High
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

A use-after-free flaw was found in nci_request in net/nfc/nci/core.c in NFC Controller Interface (NCI) in the Linux kernel. This flaw could allow a local attacker with user privileges to cause a data race problem while the device is getting removed, leading to a privilege escalation problem.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linux5.15.5-1DEBIAN-CVE-2021-4202
Debian:13linux5.15.5-1DEBIAN-CVE-2021-4202
Debian:14linux5.15.5-1DEBIAN-CVE-2021-4202
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2021-4202
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2021-4202
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2021-4202

Affected products (as reported)

VendorProductVersions
n/a kernel kernel 5.16 rc2

Weakness: CWE-362

References