| Name | CVE-2026-33055 |
| Description | tar-rs is a tar archive reading/writing library for Rust. Versions 0.4.44 and below have conditional logic that skips the PAX size header in cases where the base header size is nonzero. As part of CVE-2025-62518, the astral-tokio-tar project was changed to correctly honor PAX size headers in the case where it was different from the base header. This is almost the inverse of the astral-tokio-tar issue. Any discrepancy in how tar parsers honor file size can be used to create archives that appear differently when unpacked by different archivers. In this case, the tar-rs (Rust tar) crate is an outlier in checking for the header size - other tar parsers (including e.g. Go archive/tar) unconditionally use the PAX size override. This can affect anything that uses the tar crate to parse archives and expects to have a consistent view with other parsers. This issue has been fixed in version 0.4.45. |
| 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 | 1131480, 1135225 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| rust-tar (PTS) | bullseye | 0.4.26-1 | vulnerable |
| bookworm | 0.4.38-1 | vulnerable |
| trixie | 0.4.43-4 | vulnerable |
| forky, sid | 0.4.45-2 | fixed |
| rustc (PTS) | bullseye | 1.48.0+dfsg1-2 | vulnerable |
| bookworm | 1.63.0+dfsg1-2 | vulnerable |
| trixie | 1.85.0+dfsg3-1 | vulnerable |
| forky, sid | 1.94.1+dfsg1-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| rust-tar | source | (unstable) | 0.4.45-1 | | | 1131480 |
| rustc | source | (unstable) | 1.92.0+dfsg1-2 | | | 1135225 |
Notes
[bullseye] - rustc <postponed> (Minor issue, path traversal, requires recompiling rdeps)
[bullseye] - rust-tar <postponed> (Minor issue, path traversal, requires recompiling rdeps)
https://rustsec.org/advisories/RUSTSEC-2026-0068.html
https://github.com/alexcrichton/tar-rs/security/advisories/GHSA-gchp-q4r4-x4ff
Fixed by: https://github.com/alexcrichton/tar-rs/commit/de1a5870e603758f430073688691165f21a33946 (0.4.45)