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libevent

Multiple security vulnerabilities were identified in libevent, an asynchronous event notification library, affecting various versions used in Red Hat and Ubuntu distributions. These include denial of service, HTTP request smuggling, buffer overflows, access control bypass, and arbitrary code execution issues. The vulnerabilities impact HTTP parsing, RPC data handling, and AF_UNIX socket processing. Fixes are available through official updates from Red Hat and Ubuntu, including Ubuntu Pro for extended support. Users are advised to apply the provided patches to mitigate these risks.

The libevent library contains several security flaws: CVE-2026-63382 involves HTTP parser bugs enabling HTTP request smuggling; CVE-2026-63383 is a denial of service via malformed RPC data; CVE-2026-63384 is a denial of service via integer conversion error in evtag_unmarshal_header; CVE-2026-63385 involves HTTP header handling bugs leading to access control bypass; CVE-2026-63387 is an off-by-one stack buffer overflow causing denial of service or data corruption; CVE-2026-63388 is an arbitrary code execution vulnerability via heap out-of-bounds write in AF_UNIX handling. These issues affect multiple stable versions of libevent in Red Hat Hardened Images and various Ubuntu LTS releases. Official patches have been released by Red Hat and Ubuntu, including updates distributed via Ubuntu Pro for legacy versions.

Detailed information about Libevent: Prior to 2.1.13 and 2.2.2-a ...) (CVE-2026-63382) affecting null libevent. Get real-time updates, technical details, and mi

Libevent: Prior to 2.1.13 and 2.2.2-a ...) (CVE-2026-63382) - Live Threat Intelligence - Threat Radar | OffSeq.com

https://access.redhat.com/errata/RHSA-2026:63388

https://access.redhat.com/security/cve/CVE-2026-63382

https://access.redhat.com/security/cve/CVE-2026-63385

https://access.redhat.com/security/updates/classification/

https://images.redhat.com/

https://access.redhat.com/security/cve/CVE-2026-63387

Canonical URL

https://access.redhat.com/errata/RHSA-2026:67908

https://access.redhat.com/security/updates/classification/#important

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Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update

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