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Vulnerabilities CVE-2026-16517

CVE-2026-16517

Low
Open
TLP:CLEAR

Libarchive: libarchive: signed integer overflow in archive_write_zip_header

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Description

A signed integer overflow vulnerability was found in libarchive's ZIP writer. In the archive_write_zip_header function in archive_write_set_format_zip.c, when ZIP encryption is enabled and the entry file size is close to INT64_MAX, the addition of the encryption overhead to the entry size overflows int64_t, resulting in undefined behavior. This could lead to incorrect Zip64 extension decisions or potential memory corruption.

Details

CVSS Score
2.9
EPSS Score
0.08%

0.2th percentile

CVSS Vector
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
Confidence
90%
Published
Jul 21, 2026
Last Modified
Aug 19, 2026
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