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Vulnerability · Published May 12, 2021 · Assigned by palo_alto

CVE-2021-23134Linux kernel llcp_sock_bind/connect use-after-free

High 7.8

In plain English

A high-severity use-after-free in Linux Kernel from Linux 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 32% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.8High
Exploit odds (30 days)0.4%top 68.4% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known

Official description

Use After Free vulnerability in nfc sockets in the Linux Kernel before 5.12.4 allows local attackers to elevate their privileges. In typical configurations, the issue can only be triggered by a privileged local user with the CAP_NET_RAW capability.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linux5.10.38-1DEBIAN-CVE-2021-23134
Debian:13linux5.10.38-1DEBIAN-CVE-2021-23134
Debian:14linux5.10.38-1DEBIAN-CVE-2021-23134
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2021-23134
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2021-23134
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2021-23134

Affected products (as reported)

VendorProductVersions
Linux Kernel Linux Kernel unspecified – before 5.12.4

Weakness: CWE-416 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References