CVE-2026-5745
It was discovered that libarchive did not properly manage memory when unpacking certain RAR5 archives, leading to a double free. An attacker could possibly use this issue to cause a denial of service. (CVE-2026-14164) It was discovered that libarchive did not properly validate certain tar archives, leading to a buffer overflow. A remote attacker could possibly use this issue to cause a denial of service or execute arbitrary code. This issue only affected Ubuntu 26.04 LTS. (CVE-2026-15028) It was discovered that libarchive did not properly validate certain malformed ACL entries. An attacker could possibly use this issue to cause a denial of service. (CVE-2026-5745)
CSIRTS triage
- What
- Multiple vulnerabilities exist that can lead to denial of service or arbitrary code execution.
- Who is affected
- Users of libarchive on Ubuntu 26.04 LTS.
- Urgency
- Remediation is important due to the potential for denial of service and code execution.
- Action
- Update libarchive to the latest version to address these vulnerabilities.
AI-assisted analysis generated from the source advisory — verify against the original.
⚡ Watch CVE-2026-5745
Get an email if CVE-2026-5745 is added to CISA KEV, gains public exploit code, or a new advisory cites it — max one per day, one-click unsubscribe.
Exploitation outlook
- Low exploitation risk0.16% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 6% of all EPSS-scored CVEs.
Advisory coverage (2)
- medium[UPDATE] [medium] libarchive: Vulnerability allows denial of servicecert-bund · 2026-07-22
- unknownUSN-8581-1: libarchive vulnerabilitiesubuntu · 2026-07-21
External references
Embed the live status
— this badge updates automatically when the KEV or exploit status changes. How to embed it →
[](https://www.csirts.com/cve/CVE-2026-5745)