Description
An issue has been found in libpng 1.6.34. It is a SEGV in the function png_free_data in png.c, related to the recommended error handling for png_read_image.
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 | libpng1.6 | 1.6.37-1 | — |
| Debian 13 | libpng1.6 | 1.6.37-1 | — |
| Debian 12 | libpng1.6 | 1.6.37-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 18.04 LTS | libpng1.6 | 1.6.34-1ubuntu0.18.04.2+esm3 | — |
| Ubuntu Pro 16.04 LTS | libpng | 1.2.54-1ubuntu1.1+esm1 | USN-5432-1 |
| Ubuntu Pro 16.04 LTS | libpng1.6 | 1.6.20-2ubuntu0.1~esm1 | USN-5432-2 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | libpng16 | 1.6.37-3.3 | openSUSE-SU-2024:10972-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | libpng | 1.6.37-r0 | — |
| Alpine v3.23 | libpng | 1.6.37-r0 | — |
| Alpine v3.22 | libpng | 1.6.37-r0 | — |
| Alpine v3.21 | libpng | 1.6.37-r0 | — |
| Alpine v3.20 | libpng | 1.6.37-r0 | — |
Show 14 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | libpng | 1.6.37-r0 | — |
| Alpine v3.18 | libpng | 1.6.37-r0 | — |
| Alpine v3.17 | libpng | 1.6.37-r0 | — |
| Alpine v3.16 | libpng | 1.6.37-r0 | — |
| Alpine v3.15 | libpng | 1.6.37-r0 | — |
| Alpine v3.14 | libpng | 1.6.37-r0 | — |
| Alpine v3.13 | libpng | 1.6.37-r0 | — |
| Alpine v3.12 | libpng | 1.6.37-r0 | — |
| Alpine v3.11 | libpng | 1.6.37-r0 | — |
| Alpine v3.10 | libpng | 1.6.37-r0 | — |
| Alpine v3.9 | libpng | 1.6.37-r0 | — |
| Alpine v3.8 | libpng | 1.6.37-r0 | — |
| Alpine v3.7 | libpng | 1.6.37-r0 | — |
| Alpine v3.6 | libpng | 1.6.37-r0 | — |
Advisories 3
- USN-5432-1 libpng vulnerabilities Ubuntu Security Notices (USN) · Jun 25, 2026
- USN-5432-2 libpng1.6 vulnerabilities Ubuntu Security Notices (USN) · Jun 25, 2026
- openSUSE-SU-2024:10972-1 libpng16-16-1.6.37-3.3 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
References
- https://github.com/fouzhe/security/tree/master/libpng
- https://github.com/glennrp/libpng/issues/238
- http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html
- 20190417 [slackware-security] libpng (SSA:2019-107-01) mailing-list
- http://packetstormsecurity.com/files/152561/Slackware-Security-Advisory-libpng-Updates.html
- GLSA-201908-02 vendor-advisory