| Name | CVE-2021-33463 | 
| Description | An issue was discovered in yasm version 1.3.0. There is a NULL pointer dereference in yasm_expr__copy_except() in libyasm/expr.c. | 
| Source | CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) | 
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status | 
|---|
| yasm (PTS) | bullseye | 1.3.0-2.1 | vulnerable | 
|  | bookworm | 1.3.0-4 | vulnerable | 
|  | forky, trixie | 1.3.0-7 | vulnerable | 
|  | sid | 1.3.0-8 | vulnerable | 
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs | 
|---|
| yasm | source | (unstable) | (unfixed) | unimportant |  |  | 
Notes
https://github.com/yasm/yasm/issues/174
Crash in CLI tool, no security impact