CVE-2026-4426
Libarchive: libarchive: denial of service via malformed iso file processing
CVE-2026-4426 is fixed in 6 products on 1 platform, first by DEBIAN-CVE-2026-4426, released March 19, 2026. It is not reported as exploited. Patch Radar priority: Routine.
Routine
CVSS
6.5
Moderate
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0032
24th percentile
undefined behavior due to unvalidated operand in shift expression of the zisofs decompression code
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| bsdcpio · Ubuntu 18.04.6 LTS (bionic) | 3.2.2-3.1ubuntu0.7+esm3 | bsdcpio 3.2.2-3.1ubuntu0.7+esm3 | Mar 30, 2026 |
| bsdtar · Ubuntu 18.04.6 LTS (bionic) | 3.2.2-3.1ubuntu0.7+esm3 | bsdtar 3.2.2-3.1ubuntu0.7+esm3 | Mar 30, 2026 |
| libarchive · Debian 12.15 (bookworm) | 3.6.2-1+deb12u4 | DEBIAN-CVE-2026-4426 | Mar 19, 2026 |
| libarchive · Debian 13.5 (trixie) | 3.7.4-4+deb13u1 | DEBIAN-CVE-2026-4426 | Mar 19, 2026 |
| libarchive · Debian 14 | 3.8.7-1 | DEBIAN-CVE-2026-4426 | Mar 19, 2026 |
| libarchive · sles 15.6 | 3.7.2-150600.3.20.1 | SUSE-SU-2026:2490-1 | Jun 22, 2026 |
| libarchive · sles 15.7 | 3.7.2-150600.3.20.1 | SUSE-SU-2026:2490-1 | Jun 22, 2026 |
| libarchive-tools · Ubuntu 18.04.6 LTS (bionic) | 3.2.2-3.1ubuntu0.7+esm3 | libarchive-tools 3.2.2-3.1ubuntu0.7+esm3 | Mar 30, 2026 |
| libarchive-tools · Ubuntu 20.04 LTS (focal) | 3.4.0-2ubuntu1.5+esm2 | libarchive-tools 3.4.0-2ubuntu1.5+esm2 | Mar 30, 2026 |
| libarchive-tools · Ubuntu 22.04.1 LTS (jammy) | 3.6.0-1ubuntu1.7 | libarchive-tools 3.6.0-1ubuntu1.7 | Mar 30, 2026 |
| libarchive-tools · Ubuntu 24.04.5 LTS (noble) | 3.7.2-2ubuntu0.7 | libarchive-tools 3.7.2-2ubuntu0.7 | Mar 30, 2026 |
| libarchive-tools · Ubuntu 25.10 (questing) | 3.7.7-0ubuntu3.2 | libarchive-tools 3.7.7-0ubuntu3.2 | Mar 30, 2026 |
| libarchive-tools · Ubuntu 26.04.1 LTS (resolute) | 3.8.5-1ubuntu2.1 | libarchive-tools 3.8.5-1ubuntu2.1 | Mar 30, 2026 |
| libarchive13 · Ubuntu 18.04.6 LTS (bionic) | 3.2.2-3.1ubuntu0.7+esm3 | libarchive13 3.2.2-3.1ubuntu0.7+esm3 | Mar 30, 2026 |
| libarchive13 · Ubuntu 20.04 LTS (focal) | 3.4.0-2ubuntu1.5+esm2 | libarchive13 3.4.0-2ubuntu1.5+esm2 | Mar 30, 2026 |
| libarchive13 · Ubuntu 22.04.1 LTS (jammy) | 3.6.0-1ubuntu1.7 | libarchive13 3.6.0-1ubuntu1.7 | Mar 30, 2026 |
| libarchive13t64 · Ubuntu 24.04.5 LTS (noble) | 3.7.2-2ubuntu0.7 | libarchive13t64 3.7.2-2ubuntu0.7 | Mar 30, 2026 |
| libarchive13t64 · Ubuntu 25.10 (questing) | 3.7.7-0ubuntu3.2 | libarchive13t64 3.7.7-0ubuntu3.2 | Mar 30, 2026 |
| libarchive13t64 · Ubuntu 26.04.1 LTS (resolute) | 3.8.5-1ubuntu2.1 | libarchive13t64 3.8.5-1ubuntu2.1 | Mar 30, 2026 |
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