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.
History

Mon, 19 Oct 2026 13:15:00 +0000

Type Values Removed Values Added
First Time appeared Selmf
Selmf unarr
Vendors & Products Selmf
Selmf unarr

Fri, 16 Oct 2026 20:30:00 +0000

Type Values Removed Values Added
References
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Thu, 15 Oct 2026 22:00:00 +0000

Type Values Removed Values Added
Description 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.
Title unarr through 1.1.1 Off-by-One Heap Buffer Overflow via tar_get_name
Weaknesses CWE-193
References
Metrics cvssV3_1

{'score': 6.1, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H'}

cvssV4_0

{'score': 6.9, 'vector': 'CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published: 2026-10-15T21:43:19.717Z

Updated: 2026-10-16T19:39:08.849Z

Reserved: 2026-10-15T19:33:20.652Z

Link: CVE-2026-111273

cve-icon Vulnrichment

Updated: 2026-10-16T19:38:57.340Z

cve-icon NVD

Status : Deferred

Published: 2026-10-15T22:19:28.333

Modified: 2026-10-16T20:17:19.853

Link: CVE-2026-111273

cve-icon Redhat

No data.