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CVE-2026-17591 Details

Description

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.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: [email protected]CVSS-B:3.6 LOWVector:CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:L

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://access.redhat.com/errata/RHSA-2026:77775	[email protected]
https://access.redhat.com/security/cve/CVE-2026-17591	[email protected]
https://bugzilla.redhat.com/show_bug.cgi?id=2554209	[email protected]
https://github.com/libarchive/libarchive/pull/3318	[email protected]

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-416	Use After Free	[email protected]

Affected Products

No affected product data is available for this CVE.

Change History

4 change records found show changes

Date	Action	Recorded By
Nov 6, 2026	CVE Modified	[email protected]
Oct 19, 2026	CVE Modified	CISA-ADP
Oct 17, 2026	CVE Modified	[email protected]
Oct 16, 2026	New CVE Received	[email protected]