Description
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.
Affected products
libarchive: libarchive; redhat: hardened images; redhat: openshift container platform; redhat: openshift container platform for arm64; redhat: openshift container platform for power; redhat: enterprise linux; redhat: enterprise linux server aus
References10
- access.redhat.com/errata/RHSA-2026:10065 Third Party Advisory
- access.redhat.com/errata/RHSA-2026:10097 Third Party Advisory
- access.redhat.com/errata/RHSA-2026:11768 Third Party Advisory
- access.redhat.com/errata/RHSA-2026:12071
- access.redhat.com/errata/RHSA-2026:12274
- access.redhat.com/errata/RHSA-2026:13812
- access.redhat.com/errata/RHSA-2026:14773
- access.redhat.com/errata/RHSA-2026:14937
- access.redhat.com/errata/RHSA-2026:15087
- access.redhat.com/errata/RHSA-2026:16008
Metrics
- CVSS 3.1
-
7.5
HIGH
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - EPSS — exploit probability
- 1% percentile: 71 · as of 12 November 2026
- CWE
- CWE-125
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