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.
CVSS Details
- CVSS 3.1 Base Score: 2.9
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade libarchive | Sep 1, 2026 | Sep 1, 2026 |
| Redhat_linux | — | Upgrade bsdunzip-debuginfoUpgrade libarchive-debuginfoUpgrade bsdcpio-debuginfoNo solution existsUpgrade bsdtar-debuginfoUpgrade libarchiveUpgrade libarchive-develUpgrade bsdcat-debuginfoUpgrade libarchive-debugsourceUpgrade bsdtar | Jul 23, 2026 | Jul 3, 2026 |
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