Description
An issue was discovered in gif2apng 1.9. There is a heap-based buffer overflow within the main function. It allows an attacker to write data outside of the allocated buffer. The attacker has control over a part of the address that data is written to, control over the written data, and (to some extent) control over the amount of data that is written.
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 11 | gif2apng | 1.9+srconly-3+deb11u1 | — |
| Debian 9 | gif2apng | 1.9+srconly-2+deb9u2 | DLA-2937-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | gif2apng | 1.9+srconly-3ubuntu0.1 | USN-5969-1 |
| Ubuntu 18.04 LTS | gif2apng | 1.9+srconly-2ubuntu0.1 | USN-5969-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 16.04 LTS | gif2apng | 1.7-3ubuntu0.1~esm1 | USN-5969-1 |
Advisories 2
- USN-5969-1 gif2apng vulnerabilities Ubuntu Security Notices (USN) · Jun 25, 2026
- DLA-2937-1 gif2apng - security update Debian Security (DSA / DLA) · Mar 9, 2026