CVE-2026-17591 — Libarchive: libarchive: use-after-free via aliased mac metadata copy
A flaw was found in libarchive. An attacker can cause a Denial of Service (DoS) or potential information disclosure due to a use-after-free vulnerability, which occurs when a pr…
Published: 2026-10-16 · CVSS: 3.6 · CVSS 3.1
A flaw was found in libarchive. An attacker can cause a Denial of Service (DoS) or potential information disclosure due to a use-after-free vulnerability, which occurs when a program reads memory that has already been released. This issue arises when the archive_entry_copy_mac_metadata() function deallocates an internal buffer before completing a data copy. An attacker who can supply input to an application utilizing this function can trigger the flaw to crash the application or read uninitialized memory data.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7