Description
IO::Compress versions from 2.207 before 2.220 for Perl ship a zipdetails CLI tool that crashes with undefined subroutine on Info-ZIP Unix Extra Field with 8-byte UID or GID.
When decode_ux() in bin/zipdetails handles an Info-ZIP Unix Extra Field (tag 0x7875) with UID Size or GID Size set to 8, causing zipdetails to decode an 8-byte UID or GID value, it dispatches through decodeLitteEndian(), which calls a misnamed helper unpackValueQ. The actual function defined in the same file is unpackValue_Q (with underscore); the call raises 'Undefined subroutine &main::unpackValueQ' and the script exits with status 255.
Library callers of IO::Compress and IO::Uncompress are not affected; the defect is in the bundled CLI tool.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| PMQS | IO::Compress | 2.207 – < 2.220 | 2.220 |
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 | libio-compress-perl | 2.220-1 | — |
| Debian 14 | perl | 5.40.1-8 | — |
| Debian 13 | libio-compress-perl | 2.213-1+deb13u1 | — |
| Debian 13 | perl | 5.40.1-6+deb13u1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | perl +1 | No fix yet | — |
| Ubuntu 26.04 LTS | perl +1 | No fix yet | — |
| Ubuntu 25.10 | perl +1 | No fix yet | — |
| Ubuntu 24.04 LTS | libio-compress-perl | No fix yet | — |
| Ubuntu 22.04 LTS | perl | No fix yet | — |
Show 7 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | libio-compress-perl | No fix yet | — |
| Ubuntu 18.04 LTS | libio-compress-perl | No fix yet | — |
| Ubuntu 16.04 LTS | libio-compress-perl | No fix yet | — |
| Ubuntu Pro 20.04 LTS | perl | No fix yet | — |
| Ubuntu Pro 18.04 LTS | perl | No fix yet | — |
| Ubuntu Pro 16.04 LTS | perl | No fix yet | — |
| Ubuntu Pro 14.04 LTS | perl | No fix yet | — |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | perl-IO-Compress | 2.220.0-2.1 | openSUSE-SU-2026:10969-1 |
| openSUSE Leap 16.0 | perl-IO-Compress | 2.220.0-bp160.1.1 | openSUSE-SU-2026:21177-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | perl | 5.42.3-r0 | — |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | perl-IO-Compress +1 | 2.217-1.amzn2023.0.2 | ALAS2023-2026-1825 |
Advisories 3
- openSUSE-SU-2026:21177-1 Security update for perl-IO-Compress SUSE / openSUSE Security Updates · Jul 2, 2026
- ALAS2023-2026-1825 Important: perl-IO-Compress security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Jun 22, 2026
- openSUSE-SU-2026:10969-1 perl-IO-Compress-2.220.0-2.1 on GA media SUSE / openSUSE Security Updates · Jun 9, 2026