CVE-2026-16517
Published: July 22, 2026Last modified: August 5, 2026
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.
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 2.9 |
| Attack Vector | LOCAL |
| Attack complexity | HIGH |
| Privileges required | NONE |
| User interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality | NONE |
| Integrity impact | NONE |
| Availability impact | LOW |
| Vector | CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L |
Status
| Product | Release | Package | Status |
|---|---|---|---|
| Alpaquita Linux | 23 LTS | libarchive | Fixed (3.8.8-r1) |
| 25 LTS | libarchive | Fixed (3.8.8-r1) | |
| Stream | libarchive | Fixed (3.8.8-r1) |
References
- https://access.redhat.com/errata/RHSA-2026:43818
- https://access.redhat.com/security/cve/CVE-2026-16517
- https://bugzilla.redhat.com/show_bug.cgi?id=2505492
- https://github.com/libarchive/libarchive/issues/3225
- https://github.com/libarchive/libarchive/pull/3228
- https://github.com/libarchive/libarchive/commit/1c6e7b491f60fce335c20a9692f870d1f1ca39aa