RHSA-2026:67910HighCVSS 8.6

Red Hat Security Advisory: libevent security update

Published
September 16, 2026
Last Modified
September 28, 2026

🔗 CVE IDs covered (8)

CVE-2026-63384 →CVE-2026-63385 →CVE-2026-63387 →CVE-2026-63388 →CVE-2026-63379 →CVE-2026-63381 →CVE-2026-63382 →CVE-2026-63383 →

📋 Description

CVE-2026-63379 — libevent: Libevent: HTTP header smuggling allows authorization bypass or cache poisoning CVE-2026-63381 — libevent: Libevent: Memory corruption due to use-after-free CVE-2026-63382 — libevent: libevent: Multiple HTTP Parser Bugs Enable Request Smuggling CVE-2026-63383 — libevent: Libevent: Denial of Service via malformed RPC data CVE-2026-63384 — libevent: Libevent: Denial of Service via integer conversion error in evtag_unmarshal_header CVE-2026-63385 — libevent: Libevent: HTTP header handling bugs create risk of access control bypass. CVE-2026-63387 — libevent: Libevent: Off-by-one stack buffer overflow leading to denial of service or data corruption CVE-2026-63388 — libevent: Libevent: Arbitrary code execution via heap out-of-bounds write in AF_UNIX handling

🎯 Affected products34

  • Red Hat Enterprise Linux AppStream (v. 9)
  • Red Hat Enterprise Linux BaseOS (v. 9)
  • libevent-0:2.1.13-1.el9_8.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • libevent-0:2.1.13-1.el9_8.i686 as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • libevent-0:2.1.13-1.el9_8.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • libevent-0:2.1.13-1.el9_8.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • libevent-0:2.1.13-1.el9_8.src as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • libevent-0:2.1.13-1.el9_8.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • libevent-debuginfo-0:2.1.13-1.el9_8.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • libevent-debuginfo-0:2.1.13-1.el9_8.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • libevent-debuginfo-0:2.1.13-1.el9_8.i686 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • libevent-debuginfo-0:2.1.13-1.el9_8.i686 as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • libevent-debuginfo-0:2.1.13-1.el9_8.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • libevent-debuginfo-0:2.1.13-1.el9_8.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • libevent-debuginfo-0:2.1.13-1.el9_8.s390x as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • libevent-debuginfo-0:2.1.13-1.el9_8.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • libevent-debuginfo-0:2.1.13-1.el9_8.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • libevent-debuginfo-0:2.1.13-1.el9_8.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • libevent-debugsource-0:2.1.13-1.el9_8.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • libevent-debugsource-0:2.1.13-1.el9_8.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • libevent-debugsource-0:2.1.13-1.el9_8.i686 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • libevent-debugsource-0:2.1.13-1.el9_8.i686 as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • libevent-debugsource-0:2.1.13-1.el9_8.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • libevent-debugsource-0:2.1.13-1.el9_8.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • libevent-debugsource-0:2.1.13-1.el9_8.s390x as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • libevent-debugsource-0:2.1.13-1.el9_8.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • libevent-debugsource-0:2.1.13-1.el9_8.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • libevent-debugsource-0:2.1.13-1.el9_8.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • libevent-devel-0:2.1.13-1.el9_8.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • libevent-devel-0:2.1.13-1.el9_8.i686 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • +4 more not shown

✅ Remediation

For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 Workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability. Workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.

🔗 References (11)