{"id":"CVE-2026-16517","title":"A signed integer overflow vulnerability was found in libarchive's ZIP writer","summary":"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 a…","severity":"low","cvss":2.9,"cvssVector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L","cwe":["CWE-190"],"vendor":"Red Hat","product":"libarchive","affected":["libarchive (all versions)","libarchive-main (all versions)","libarchive (all versions)","libarchive (all versions)","libarchive","libarchive","openshift/ose-rhel-coreos-8 (all versions)","openshift/ose-rhel-coreos-9 (all versions)"],"published":"2026-07-21","updated":"2026-09-22","sourceUpdated":"2026-09-22T00:16:31.997","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-16517","references":[{"url":"https://access.redhat.com/errata/RHSA-2026:43818","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:69553","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/security/cve/CVE-2026-16517","label":"secalert@redhat.com"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2505492","label":"secalert@redhat.com"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-16517.json"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-16517"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-16517"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-07-22T12:44:48.802617Z"},"epss":0.00079,"epssPercentile":0.00184,"ingestedAt":"2026-09-14T15:13:46.885Z","patched":["enterprise_linux_appstream_v_10","enterprise_linux_baseos_v_10","hardened_images"],"slug":"CVE-2026-16517","body":"## Overview\n\nA 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **RHSA-2026:69553** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux BaseOS (v. 10) · released 2026-09-21 · [advisory](https://access.redhat.com/errata/RHSA-2026:69553)\n- **RHSA-2026:43818** · Red Hat · fixed in: Red Hat Hardened Images · released 2026-07-22 · [advisory](https://access.redhat.com/errata/RHSA-2026:43818)\n- **Red Hat VEX** · Low · affected: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat OpenShift Container Platform 4 · updated 2026-09-21 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-16517.json)","depth":"sunlit","depthScore":16,"depthScoreParts":{"impact":16,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}