CVE-2026-111273

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 v3 6.1 MEDIUM

6.1^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.8 / Impact : 4.2

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact NONE

Integrity Impact LOW

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/selmf/unarr
https://github.com/selmf/unarr/blob/b211040df83dee513362cdeb9bd87afa26fd5e38/tar/parse-tar.c#L242-L254
https://hackmd.io/@haind-pwn/unarr-tar-zip-oob
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

Configurations

No configuration.

History

16 Oct 2026, 20:17

Type	Values Removed	Values Added
References		() https://hackmd.io/@haind-pwn/cve-2026-111273-111274-unarr-tar-zip-oob -

15 Oct 2026, 22:19

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-15 22:19

Updated : 2026-10-16 20:17

NVD link : CVE-2026-111273

Mitre link : CVE-2026-111273

CVE.ORG link : CVE-2026-111273

JSON object : View

Products Affected

No product.

CWE

CWE-193

Off-by-one Error

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