Vulnerability · Published Mar 10, 2021 · Assigned by redhat
CVE-2021-20265
Medium 5.5
In plain English
A medium-severity uncontrolled resource consumption 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 27% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)5.5Medium
Exploit odds (30 days)0.3%top 72.5% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
A flaw was found in the way memory resources were freed in the unix_stream_recvmsg function in the Linux kernel when a signal was pending. This flaw allows an unprivileged local user to crash the system by exhausting available memory. The highest threat from this vulnerability is to system availability.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | linux | 4.4.4-1 | DEBIAN-CVE-2021-20265 |
| Debian:13 | linux | 4.4.4-1 | DEBIAN-CVE-2021-20265 |
| Debian:14 | linux | 4.4.4-1 | DEBIAN-CVE-2021-20265 |
Affected products (as reported)
Weakness: CWE-400