| Name | CVE-2026-48961 |
| 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. |
| Source | CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| Debian Bugs | 1138052, 1138855 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| libio-compress-perl (PTS) | bullseye | 2.101-1 | fixed |
| bookworm | 2.204-1 | fixed | |
| trixie | 2.213-1 | vulnerable | |
| forky, sid | 2.220-1 | fixed | |
| perl (PTS) | bullseye | 5.32.1-4+deb11u3 | vulnerable |
| bullseye (security) | 5.32.1-4+deb11u5 | vulnerable | |
| bookworm | 5.36.0-7+deb12u3 | vulnerable | |
| bookworm (security) | 5.36.0-7+deb12u2 | vulnerable | |
| trixie | 5.40.1-6 | vulnerable | |
| forky, sid | 5.40.1-8 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| libio-compress-perl | source | bullseye | (not affected) | |||
| libio-compress-perl | source | bookworm | (not affected) | |||
| libio-compress-perl | source | (unstable) | 2.220-1 | 1138052 | ||
| perl | source | (unstable) | 5.40.1-8 | 1138855 |
[trixie] - libio-compress-perl <no-dsa> (Minor issue)
[bookworm] - libio-compress-perl <not-affected> (Vulnerable code introduced later)
[bullseye] - libio-compress-perl <not-affected> (Vulnerable code introduced later)
https://lists.security.metacpan.org/cve-announce/msg/40434383/
Introduced with: https://github.com/pmqs/IO-Compress/commit/ddfe67584a228877e5d28840da75ff32e435a5e3 (v2.207)
Fixed by: https://github.com/pmqs/IO-Compress/commit/33c89d03d6e746ed2ead4f2f6570d47864c61bc7 (v2.220)