Vulnerability · Published Jul 26, 2022 · Assigned by mitre
CVE-2021-33456
Medium 5.5
In plain English
A medium-severity security flaw in the yasm package (Debian). 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 26% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)5.5Medium
Exploit odds (30 days)0.3%top 74.4% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
An issue was discovered in yasm version 1.3.0. There is a NULL pointer dereference in hash() in modules/preprocs/nasm/nasm-pp.c.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | yasm | no fix listed | DEBIAN-CVE-2021-33456 |
| Debian:13 | yasm | no fix listed | DEBIAN-CVE-2021-33456 |
| Debian:14 | yasm | 1.3.0-8 | DEBIAN-CVE-2021-33456 |
| Ubuntu:22.04:LTS | yasm | no fix listed | UBUNTU-CVE-2021-33456 |
| Ubuntu:24.04:LTS | yasm | no fix listed | UBUNTU-CVE-2021-33456 |
| Ubuntu:25.10 | yasm | no fix listed | UBUNTU-CVE-2021-33456 |
| Ubuntu:26.04:LTS | yasm | no fix listed | UBUNTU-CVE-2021-33456 |
| Ubuntu:26.10 | yasm | no fix listed | UBUNTU-CVE-2021-33456 |
Affected products (as reported)
References
- https://github.com/yasm/yasm/issues/175 x_refsource_MISC
- https://gist.github.com/Clingto/bb632c0c463f4b2c97e4f65f751c5e6d x_refsource_MISC