Description
A double-free bug in the read_gif function in gifread.c in gifsicle 1.90 allows a remote attacker to cause a denial-of-service attack or unspecified other impact via a maliciously crafted file, because last_name is mishandled, a different vulnerability than CVE-2017-1000421.
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 14 | gifsicle | 1.91-1 | — |
| Debian 13 | gifsicle | 1.91-1 | — |
| Debian 12 | gifsicle | 1.91-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 16.04 LTS | gifsicle | 1.88-1ubuntu0.1~esm1 | USN-4803-1 |
| Ubuntu Pro 14.04 LTS | gifsicle | 1.78-1ubuntu0.1~esm1 | USN-4803-1 |
Advisories 1
- USN-4803-1 gifsicle vulnerabilities Ubuntu Security Notices (USN) · Jun 29, 2026