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CVE-2026-4424

high

A flaw was found in libarchive.

Vendor / product: Libarchive — libarchive

A flaw was found in libarchive. This heap out-of-bounds read vulnerability exists in the RAR archive processing logic due to improper validation of the LZSS sliding window size after transitions between compression methods. A remote attacker can exploit this by providing a specially crafted RAR archive, leading to the disclosure of sensitive heap memory information without requiring authentication or user interaction.

CVSS
7.5
7.5 (CVSS v3.1)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Severity source: NVD CVSS v3.1 (secalert@redhat.com)
Timeline (UTC)
Published: 2026-03-19 15:16
Modified: 2026-11-04 23:17
NVD status: Modified
Last synced 40 minutes ago
Verified against the source API 2026-11-04 23:38 UTC
Exploitation
Not listed in CISA KEV (as of last catalog sync)
Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).

Affected products

libarchive / libarchive all versions
redhat / hardened_images all versions
redhat / openshift_container_platform 4.0, 4.16
redhat / openshift_container_platform_for_arm64 4.16
redhat / openshift_container_platform_for_power 4.16
redhat / enterprise_linux 6.0, 7.0, 8.0, 9.0, 10.0
redhat / enterprise_linux_server_aus 8.2, 8.4

Weakness classification (CWE)

CWE-125

Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.

Mitigation & advisories

No vendor advisory or patch reference tagged by NVD. Check the references below.

References

Data sources

NVD CVE API 2.0 — fetched 2026-11-04 23:38 UTC · record ↗

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