Description
Imager versions before 1.037 for Perl overflow a heap buffer fetching float samples from a paletted image in i_gsampf_fp.
For a paletted image, getsamples() with type "float" allocates a buffer of one sample per pixel and fetches every requested channel of each pixel into it. Requesting more than one channel writes past its end.
An attacker-supplied image controls the overflowing bytes through its palette.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | Imager | < 1.037 | 1.037 |
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 | 1.037+dfsg-2 | — |
| 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 24.04 LTS | libimager-perl | No fix yet | — |
| Ubuntu 22.04 LTS | libimager-perl | No fix yet | — |
| Ubuntu 20.04 LTS | libimager-perl | No fix yet | — |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | libimager-perl | No fix yet | — |
| Ubuntu 16.04 LTS | libimager-perl | No fix yet | — |