CVE-2026-63381
CVE-2026-63381: 1 tracked advisory record across Red Hat. Compare vendor sources and published fix guidance.
Compare the source-linked records below. Ratings and product/version details belong to each advisory; they are not a single CVE-wide score or proof that every listed product is affected. How VulniPulse collects and checks evidence.
Vendor advisory comparison
Red Hat
1 advisory- Advisory severityMedium6.6
Medium [CVE-2026-63381] Memory corruption due to use-after-free
CVE-2026-63381Source published Source updated
Libevent is an event notification library. Prior to 2.1.13 and 2.2.2-alpha, libevent has a use-after-free in buffer.c when evbuffer_add_buffer_reference processes an output buffer whose out_total_len is zero. evbuffer_free_all_chains frees the initial empty chain without resetting outbuf->first, outbuf->last, or outbuf->last_with_datap, and APPEND_CHAIN_MULTICAST subsequently dereferences the dangling chain pointer. A caller that can drive this buffer state can cause memory corruption or a process crash. This can lead to a dangling pointer, which an attacker could exploit to cause memory corruption or crash the application. Red Hat Enterprise Linux, OpenShift (RHCOS), RHIVOS, and community products (Fedora, Hummingbird) ship affected versions of libevent. Red Hat severity: Moderate —…
- Affected products in this advisory
- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 9
- Cert Manager support for Red Hat OpenShift release 1.20
- Red Hat Hardened Images
6 more entries in the full advisory.
- Source-reported affected versions
- < 2.1.13
- < 2.2.2-alpha
- Source-reported fixed versions
- 2.1.13
- 2.2.2
- libevent-0:2.1.13-1.el10_2
- libevent-0:2.1.13-1.el9_8
23 more entries in the full advisory.
- Mitigation guidance
- 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.
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