CVE-2026-17591

CVSS 3.6 (low) · published 2026-10-16

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.

Weakness: CWE-416

Source: NVD CVE-2026-17591

References

• https://access.redhat.com/errata/RHSA-2026:77775
• https://access.redhat.com/security/cve/CVE-2026-17591
• https://bugzilla.redhat.com/show_bug.cgi?id=2554209
• https://github.com/libarchive/libarchive/pull/3318

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