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Critical Security Flaws in Fedora libevent 2.1.13 Require Immediate Attention

Critical Security Flaws in Fedora libevent 2.1.13 Require Immediate Attention

First seen 11 Sep 2026, 04:46 UTC • •
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ThreatCluster AI
ThreatCluster •September 11, 2026 at 06:15 UTC
  • •Fedora libevent 2.1.13 has critical vulnerabilities requiring immediate updates.
  • •Multiple CVEs published on August 20, 2026, include risks of authorization bypass and cache poisoning.
  • •Affected systems include Fedora 43 and 44; users should update via 'dnf' immediately.

Fedora has released critical security updates for libevent version 2.1.13, addressing multiple vulnerabilities including CVE-2026-63379, CVE-2026-63381, CVE-2026-63382, CVE-2026-63383, CVE-2026-63384, CVE-2026-63385, CVE-2026-63387, and CVE-2026-63388. These vulnerabilities, published on August 20, 2026, include issues such as HTTP header smuggling and memory corruption, which could lead to authorization bypass and cache poisoning. Affected systems include Fedora 43 and 44. Users are urged to update their systems using the 'dnf' package manager to mitigate these risks. The updates were made available on September 7, 2026, and are critical for maintaining system security. Failure to apply these updates may leave systems vulnerable to exploitation.

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Timeline

2026-08-20
CVE-2026-63379 published
Libevent vulnerabilities including HTTP header smuggling and memory corruption disclosed.
Linuxsecurity
2026-08-20
CVE-2026-63381 published
Libevent vulnerabilities disclosed, affecting multiple Fedora versions.
Linuxsecurity
2026-08-20
CVE-2026-63382 published
Multiple vulnerabilities in libevent identified, posing security risks.
Linuxsecurity
2026-08-20
CVE-2026-63385 published
Vulnerability assigned a CVE identifier and published in the National Vulnerability Database.
MITRE
2026-08-20
CVE-2026-63387 published
Vulnerability assigned a CVE identifier and published in the National Vulnerability Database.
MITRE
2026-08-20
CVE-2026-63388 published
Vulnerability assigned a CVE identifier and published in the National Vulnerability Database.
MITRE
2026-08-20
CVE-2026-63384 published
Vulnerability assigned a CVE identifier and published in the National Vulnerability Database.
MITRE
2026-08-20
CVE-2026-63383 published
Vulnerability assigned a CVE identifier and published in the National Vulnerability Database.
MITRE
2026-09-07
Fedora releases libevent 2.1.13 update
Critical updates released to address multiple vulnerabilities in libevent.
Linuxsecurity
2026-09-11
Critical security advisory published
Linuxsecurity publishes advisory urging immediate updates for Fedora libevent vulnerabilities.
Linuxsecurity

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Extracted Entities (12)

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