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Vulnerabilities CVE-2026-43623

CVE-2026-43623

High
Open
TLP:CLEAR

microtar 0.1.0 Stack-Based Buffer Overflow via raw_to_header()

NVD CVE.org
Government Targeting

AI Analysis

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Description

microtar through 0.1.0 contains a stack-based buffer overflow vulnerability in the raw_to_header() function in src/microtar.c that allows attackers to corrupt adjacent stack memory by supplying a crafted TAR archive with non-null-terminated name or linkname fields. The function uses strcpy() to copy 100-byte ustar format fields that lack null terminators, causing writes of up to 355 bytes into a 100-byte destination buffer when mtar_open(), mtar_find(), or mtar_read_header() process attacker-supplied TAR archives.

Details

CVSS Score
8.7
EPSS Score
0.32%

24.3th percentile

CVSS Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Confidence
90%
Published
Jun 1, 2026
Last Modified
Jul 14, 2026
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