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Vulnerability · Published May 13, 2021 · Assigned by redhat

CVE-2020-27830

Medium 5.5

In plain English

A medium-severity null pointer dereference in kernel. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 23% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS NVD)5.5Medium
Exploit odds (30 days)0.3%top 76.8% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known

Official description

A vulnerability was found in Linux Kernel where in the spk_ttyio_receive_buf2() function, it would dereference spk_ttyio_synth without checking whether it is NULL or not, and may lead to a NULL-ptr deref crash.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linux5.9.15-1DEBIAN-CVE-2020-27830
Debian:13linux5.9.15-1DEBIAN-CVE-2020-27830
Debian:14linux5.9.15-1DEBIAN-CVE-2020-27830
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2020-27830
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2020-27830
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2020-27830

Affected products (as reported)

VendorProductVersions
n/a kernel kernel 5.9.14

Weakness: CWE-476

References