p PatchFirst

CVE-2026-4426

CVE-2026-4426 · Libarchive: libarchive: denial of service via malformed iso file processing

This page contains facts from public vulnerability sources. Check the original advisory before updating.

A flaw was found in libarchive. An Undefined Behavior vulnerability exists in the zisofs decompression logic, caused by improper validation of a field (`pz_log2_bs`) read from ISO9660 Rock Ridge extensions. A remote attacker can exploit this by supplying a specially crafted ISO file. This can lead to incorrect memory allocation and potential application crashes, resulting in a denial-of-service (DoS) condition.

CVSS 6.5 · Medium · EPSS 0.6% · Fix available

Published
Updated

Stack: system

Affected products and versions

  • red hat hardened images

    Versions
    • ≥ 3.8.7-1.hum1: Not affected (rpm)

    No fix published

  • red hat enterprise linux 10

    No fix published

  • red hat enterprise linux 6

    No fix published

  • red hat enterprise linux 7

    No fix published

  • red hat enterprise linux 8

    No fix published

  • red hat enterprise linux 9

    No fix published

  • red hat openshift container platform 4

    No fix published

  • libarchive Debian:12

    Versions
    • 3.6.2-1
    • 3.6.2-1+deb12u1
    • 3.6.2-1+deb12u2
    • 3.6.2-1+deb12u3
    Affected ranges
    • ECOSYSTEM: < 3.6.2-1+deb12u4

    Update to 3.6.2-1+deb12u4

  • libarchive Debian:13

    Versions
    • 3.7.4-4
    Affected ranges
    • ECOSYSTEM: < 3.7.4-4+deb13u1

    Update to 3.7.4-4+deb13u1

  • libarchive Debian:14

    Versions
    • 3.7.4-4
    • 3.8.4-1
    • 3.8.5-1
    • 3.8.6-1
    Affected ranges
    • ECOSYSTEM: < 3.8.7-1

    Update to 3.8.7-1

  • libarchive Ubuntu:Pro:14.04:LTS

    Versions
    • 3.1.2-5ubuntu1
    • 3.1.2-7ubuntu1
    • 3.1.2-7ubuntu2
    • 3.1.2-7ubuntu2.1
    • 3.1.2-7ubuntu2.2
    • 3.1.2-7ubuntu2.3
    • 3.1.2-7ubuntu2.4
    • 3.1.2-7ubuntu2.6
    • 3.1.2-7ubuntu2.7
    • 3.1.2-7ubuntu2.8
    • 3.1.2-7ubuntu2.8+esm1
    • 3.1.2-7ubuntu2.8+esm3
    • 3.1.2-7ubuntu2.8+esm4
    Affected ranges
    • ECOSYSTEM: < 3.1.2-7ubuntu2.8+esm5

    Update to 3.1.2-7ubuntu2.8+esm5

  • libarchive Ubuntu:Pro:16.04:LTS

    Versions
    • 3.1.2-11build1
    • 3.1.2-11ubuntu0.16.04.1
    • 3.1.2-11ubuntu0.16.04.2
    • 3.1.2-11ubuntu0.16.04.3
    • 3.1.2-11ubuntu0.16.04.4
    • 3.1.2-11ubuntu0.16.04.5
    • 3.1.2-11ubuntu0.16.04.6
    • 3.1.2-11ubuntu0.16.04.7
    • 3.1.2-11ubuntu0.16.04.8
    • 3.1.2-11ubuntu0.16.04.8+esm1
    • 3.1.2-11ubuntu0.16.04.8+esm2
    Affected ranges
    • ECOSYSTEM: < 3.1.2-11ubuntu0.16.04.8+esm3

    Update to 3.1.2-11ubuntu0.16.04.8+esm3

  • libarchive Ubuntu:Pro:18.04:LTS

    Versions
    • 3.2.2-3.1
    • 3.2.2-3.1ubuntu0.1
    • 3.2.2-3.1ubuntu0.2
    • 3.2.2-3.1ubuntu0.3
    • 3.2.2-3.1ubuntu0.4
    • 3.2.2-3.1ubuntu0.5
    • 3.2.2-3.1ubuntu0.6
    • 3.2.2-3.1ubuntu0.7
    • 3.2.2-3.1ubuntu0.7+esm1
    • 3.2.2-3.1ubuntu0.7+esm2
    Affected ranges
    • ECOSYSTEM: < 3.2.2-3.1ubuntu0.7+esm3

    Update to 3.2.2-3.1ubuntu0.7+esm3

  • libarchive Ubuntu:Pro:20.04:LTS

    Versions
    • 3.4.0-1
    • 3.4.0-1build1
    • 3.4.0-1ubuntu2
    • 3.4.0-2ubuntu1
    • 3.4.0-2ubuntu1.1
    • 3.4.0-2ubuntu1.2
    • 3.4.0-2ubuntu1.3
    • 3.4.0-2ubuntu1.4
    • 3.4.0-2ubuntu1.5
    • 3.4.0-2ubuntu1.5+esm1
    Affected ranges
    • ECOSYSTEM: < 3.4.0-2ubuntu1.5+esm2

    Update to 3.4.0-2ubuntu1.5+esm2

  • libarchive Ubuntu:22.04:LTS

    Versions
    • 3.4.3-2
    • 3.4.3-2build1
    • 3.5.2-1
    • 3.5.2-1ubuntu1
    • 3.6.0-1ubuntu1
    • 3.6.0-1ubuntu1.1
    • 3.6.0-1ubuntu1.2
    • 3.6.0-1ubuntu1.3
    • 3.6.0-1ubuntu1.4
    • 3.6.0-1ubuntu1.5
    • 3.6.0-1ubuntu1.6
    Affected ranges
    • ECOSYSTEM: < 3.6.0-1ubuntu1.7

    Update to 3.6.0-1ubuntu1.7

  • libarchive Ubuntu:24.04:LTS

    Versions
    • 3.6.2-1ubuntu1
    • 3.7.2-1ubuntu1
    • 3.7.2-1ubuntu2
    • 3.7.2-1.1ubuntu2
    • 3.7.2-2
    • 3.7.2-2ubuntu0.1
    • 3.7.2-2ubuntu0.2
    • 3.7.2-2ubuntu0.3
    • 3.7.2-2ubuntu0.4
    • 3.7.2-2ubuntu0.5
    • 3.7.2-2ubuntu0.6
    Affected ranges
    • ECOSYSTEM: < 3.7.2-2ubuntu0.7

    Update to 3.7.2-2ubuntu0.7

  • libarchive Ubuntu:25.10

    Versions
    • 3.7.7-0ubuntu2
    • 3.7.7-0ubuntu2.1
    • 3.7.7-0ubuntu2.2
    • 3.7.7-0ubuntu3
    • 3.7.7-0ubuntu3.1
    Affected ranges
    • ECOSYSTEM: < 3.7.7-0ubuntu3.2

    Update to 3.7.7-0ubuntu3.2

  • libarchive Ubuntu:26.04:LTS

    Versions
    • 3.7.7-0ubuntu3
    • 3.8.5-1ubuntu1
    • 3.8.5-1ubuntu2
    Affected ranges
    • ECOSYSTEM: < 3.8.5-1ubuntu2.1

    Update to 3.8.5-1ubuntu2.1

Original sources

Check your server →