Description
Imager versions through 1.030 for Perl allow a heap out of bounds (OOB) write on crafted multi-frame GIF files.
Imager::File::GIF's i_readgif_multi_low allocates a single per-row buffer GifRow sized for the GIF's global screen width 'SWidth' and reuses it across every image in the file.
The page-match branch validates Image.Width + Image.Left > SWidth before each DGifGetLine write, but the parallel skip-image branch at imgif.c:790-805 calls DGifGetLine(GifFile, GifRow, Width) with no such check.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| TONYC | Imager | ≤ 1.030 | — |
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 | libimager-perl | 1.031+dfsg-1 | — |
| Debian 13 | libimager-perl | No fix yet | — |
| Debian 12 | libimager-perl | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | libimager-perl | No fix yet | — |
| Ubuntu 26.04 LTS | libimager-perl | No fix yet | — |
| Ubuntu 25.10 | libimager-perl | No fix yet | — |
| Ubuntu 24.04 LTS | libimager-perl | No fix yet | — |
| Ubuntu 22.04 LTS | libimager-perl | No fix yet | — |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | libimager-perl | No fix yet | — |
| Ubuntu 18.04 LTS | libimager-perl | No fix yet | — |
| Ubuntu 16.04 LTS | libimager-perl | No fix yet | — |