GHSA-c75f-55f6-f63q · Severity: high — A flaw was found in libarchive. This heap out-of-bounds read vulnerability exists in the RAR...
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.
Conclusion & alert: CVE-2026-4424 is rated Moderate Risk (49.8/100): CVSS High severity, with medium exploitation likelihood (EPSS 0.88%). Mandatory action: Review affected assets and schedule remediation.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2026-06-15 | 0.10% | 0.88% | +0.78% |
| 2 | 2026-05-26 | 0.16% | 0.10% | -0.06% |
| 3 | 2026-05-22 | — | 0.16% | — |
Full EPSS history (7 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 7.5 | 3.1 | HIGH |
|
3.9 | 3.6 | [email protected] |
GHSA-c75f-55f6-f63q · Severity: high — A flaw was found in libarchive. This heap out-of-bounds read vulnerability exists in the RAR...
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
not yet assigned | CVE-2026-4424 not yet assigned priority: Debian including 1 source packages (libarchive), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. | https://security-tracker.debian.org/tracker/CVE-2026-4424 |
redhat
|
high | — | https://access.redhat.com/security/cve/CVE-2026-4424 |
suse
|
high | — | https://www.suse.com/security/cve/CVE-2026-4424/ |
ubuntu
|
medium | CVE-2026-4424 medium priority: Ubuntu including 1 source packages (libarchive), 8 status rows across 8 suites (bionic, focal, jammy, noble, questing, trusty, upstream, xenial): deferred 7, needs-triage 1. | https://ubuntu.com/security/CVE-2026-4424 |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| libarchive | libarchive | — | cpe:2.3:a:libarchive:libarchive:-:*:*:*:*:*:*:* |
| redhat | hardened_images | — | cpe:2.3:a:redhat:hardened_images:-:*:*:*:*:*:*:* |
| redhat | openshift_container_platform | 4.0 | cpe:2.3:a:redhat:openshift_container_platform:4.0:*:*:*:*:*:*:* |
| redhat | openshift_container_platform | 4.16 | cpe:2.3:a:redhat:openshift_container_platform:4.16:*:*:*:*:*:*:* |
| redhat | openshift_container_platform_for_arm64 | 4.16 | cpe:2.3:a:redhat:openshift_container_platform_for_arm64:4.16:*:*:*:*:*:*:* |
| redhat | openshift_container_platform_for_power | 4.16 | cpe:2.3:a:redhat:openshift_container_platform_for_power:4.16:*:*:*:*:*:*:* |
| redhat | enterprise_linux | 6.0 | cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:* |
| redhat | enterprise_linux | 7.0 | cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:* |
| redhat | enterprise_linux | 8.0 | cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:* |
| redhat | enterprise_linux | 9.0 | cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:* |
| redhat | enterprise_linux | 10.0 | cpe:2.3:o:redhat:enterprise_linux:10.0:*:*:*:*:*:*:* |
| redhat | enterprise_linux_server_aus | 8.2 | cpe:2.3:o:redhat:enterprise_linux_server_aus:8.2:*:*:*:*:*:*:* |
| redhat | enterprise_linux_server_aus | 8.4 | cpe:2.3:o:redhat:enterprise_linux_server_aus:8.4:*:*:*:*:*:*:* |