CVE-2026-111273
CVE-2026-111273 · unarr through 1.1.1 Off-by-One Heap Buffer Overflow via tar_get_name
This page contains facts from public vulnerability sources. Check the original advisory before updating.
unarr through 1.1.1 contains an off-by-one heap-based buffer overflow in tar_get_name() in tar/parse-tar.c, reachable through the ar_entry_get_name() API. Attackers can supply a crafted TAR archive with a full ustar prefix and name to write a NUL byte past the allocation, corrupting heap memory and crashing the process.
CVSS 6.9 · Medium · EPSS 0.1%
- Published
- Updated
Stack: system
Affected products and versions
unarr
- Versions
- ≥ 0, ≤ 1.1.1: Affected (semver)
No fix published
unarr Debian:12
- Versions
- 1.0.1-1.1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
unarr Ubuntu:20.04:LTS
- Versions
- 1.0.1-1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
unarr Ubuntu:22.04:LTS
- Versions
- 1.0.1-1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
unarr Ubuntu:24.04:LTS
- Versions
- 1.0.1-1.1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
Original sources
- https://hackmd.io/@haind-pwn/unarr-tar-zip-oob
- https://github.com/selmf/unarr/blob/b211040df83dee513362cdeb9bd87afa26fd5e38/tar/parse-tar.c#L242-L254
- https://github.com/selmf/unarr
- https://www.vulncheck.com/advisories/unarr-through-1.1.1-off-by-one-heap-buffer-overflow-via-tar-get-name
- https://hackmd.io/@haind-pwn/cve-2026-111273-111274-unarr-tar-zip-oob
- https://nvd.nist.gov/vuln/detail/CVE-2026-111273