Description
Emacs 21 allows user-assisted attackers to cause a denial of service (crash) via certain crafted images, as demonstrated via a GIF image in vm mode, related to image size calculation.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 4.0 | emacs21 | 21.4a+1-3etch1 | DSA-1316-1 |
Advisories 1
- DSA-1316-1 emacs21 Debian Security (DSA / DLA) · Mar 9, 2026
References
- DSA-1316 vendor-advisory
- SUSE-SR:2007:019 vendor-advisory
- 1018277 vdb-entry
- http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=408929
- USN-504-1 vendor-advisory
- 24570 vdb-entry
- MDKSA-2007:133 vendor-advisory
- 26987 third-party-advisory
- https://issues.rpath.com/browse/RPL-1490