All vulnerabilities
CVE-2026-17591

Red Hat Hardened Images: Libarchive: libarchive: use-after-free via aliased mac metadata copy

Red Hat Red Hat Hardened ImagesOperating systems
Open in ThreatlineRecord JSON
CVSS
3.6Low
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.11%Chance of exploitation activity in the next 30 days, higher than 1% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed inNone listedNo source names a fixed version. Check the vendor advisory below
Published16 Oct 2026Updated 19 Oct 2026CVE List

What fixes it

No source in this snapshot names a fixed version. The vendor advisories under References are the place to check.

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.

Text from CVE List

Affected versions 1

  • Red Hat Hardened Imagesunaffected: 3.8.9-2.1.hum1 and laterCVE List

References 4