Medium severity6.5NVD Advisory· Published Mar 19, 2026· Updated May 3, 2026
CVE-2026-4426
CVE-2026-4426
Description
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
32cpe:2.3:a:libarchive:libarchive:-:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:libarchive:libarchive:-:*:*:*:*:*:*:*
- (no CPE)
- cpe:2.3:a:redhat:hardened_images:-:*:*:*:*:*:*:*
- cpe:2.3:a:redhat:openshift_container_platform:4.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:10.0:*:*:*:*:*:*:*+ 4 more
- cpe:2.3:o:redhat:enterprise_linux:10.0:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*
- osv-coords23 versionspkg:apk/chainguard/libarchivepkg:apk/chainguard/libarchive-devpkg:apk/chainguard/libarchive-docpkg:apk/chainguard/libarchive-toolspkg:apk/wolfi/libarchivepkg:apk/wolfi/libarchive-devpkg:apk/wolfi/libarchive-docpkg:apk/wolfi/libarchive-toolspkg:rpm/suse/libarchive&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP4-ESPOSpkg:rpm/suse/libarchive&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP4-LTSSpkg:rpm/suse/libarchive&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP5-ESPOSpkg:rpm/suse/libarchive&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP5-LTSSpkg:rpm/suse/libarchive&distro=SUSE%20Linux%20Enterprise%20Micro%205.3pkg:rpm/suse/libarchive&distro=SUSE%20Linux%20Enterprise%20Micro%205.4pkg:rpm/suse/libarchive&distro=SUSE%20Linux%20Enterprise%20Micro%205.5pkg:rpm/suse/libarchive&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP7pkg:rpm/suse/libarchive&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Development%20Tools%2015%20SP7pkg:rpm/suse/libarchive&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP4-LTSSpkg:rpm/suse/libarchive&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP5-LTSSpkg:rpm/suse/libarchive&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP6-LTSSpkg:rpm/suse/libarchive&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP4pkg:rpm/suse/libarchive&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP5pkg:rpm/suse/libarchive&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP6
< 3.8.7-r2+ 22 more
- (no CPE)range: < 3.8.7-r2
- (no CPE)range: < 3.8.7-r2
- (no CPE)range: < 3.8.7-r2
- (no CPE)range: < 3.8.7-r2
- (no CPE)range: < 3.8.7-r2
- (no CPE)range: < 3.8.7-r2
- (no CPE)range: < 3.8.7-r2
- (no CPE)range: < 3.8.7-r2
- (no CPE)range: < 3.5.1-150400.3.24.1
- (no CPE)range: < 3.5.1-150400.3.24.1
- (no CPE)range: < 3.5.1-150400.3.24.1
- (no CPE)range: < 3.5.1-150400.3.24.1
- (no CPE)range: < 3.5.1-150400.3.24.1
- (no CPE)range: < 3.5.1-150400.3.24.1
- (no CPE)range: < 3.5.1-150400.3.24.1
- (no CPE)range: < 3.7.2-150600.3.20.1
- (no CPE)range: < 3.7.2-150600.3.20.1
- (no CPE)range: < 3.5.1-150400.3.24.1
- (no CPE)range: < 3.5.1-150400.3.24.1
- (no CPE)range: < 3.7.2-150600.3.20.1
- (no CPE)range: < 3.5.1-150400.3.24.1
- (no CPE)range: < 3.5.1-150400.3.24.1
- (no CPE)range: < 3.7.2-150600.3.20.1
Patches
Vulnerability mechanics
References
4- github.com/libarchive/libarchive/pull/2897nvdIssue TrackingPatch
- access.redhat.com/security/cve/CVE-2026-4426nvdThird Party Advisory
- bugzilla.redhat.com/show_bug.cginvdIssue TrackingThird Party Advisory
- access.redhat.com/errata/RHSA-2026:8944nvd
News mentions
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