Description
libarchive 3.8.x before 3.8.2 has a strcpy heap-based buffer overflow in the gzip writer via the original-filename field to archive_compressor_gzip_open in archive_write_add_filter_gzip.c, aka GHSA-92wx-p669-8gr9. This relates to bsdtar. Exploitation envisions a marginally plausible scenario in which original-filename is obtained from an untrusted party. (original-filename is not derived from the input data.)
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| libarchive | libarchive | 3.8.0 – < 3.8.2 | 3.8.2 |
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.
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Hardened Images 1 | bsdcat +5 | 3.8.8-3.1.hum1 | RHSA-2026:43818 |
Advisories 2
- RHSA-2026:43818 Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update Red Hat Security Advisories (RHSA) · Oct 14, 2026
- WID-SEC-2026-3340 libarchive: Schwachstelle ermöglicht Denial of Service BSI CERT-Bund (WID) · Sep 13, 2026
References
- https://github.com/libarchive/libarchive/pull/2734
- https://github.com/libarchive/libarchive/pull/2734/commits
- https://github.com/libarchive/libarchive/pull/2734/files
- https://github.com/libarchive/libarchive/blob/master/libarchive/archive_write_add_filter_gzip.c
- https://gist.github.com/ttuurrnn/1365a4a9b1c3d5826a3a9bbe111f26b8