Cette page suit l'état du correctif pour Ubuntu. La vulnérabilité elle-même est décrite sur la page CVE principale. Voir CVE-2026-63381 →

UBUNTU-CVE-2026-63381

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_referen...

Description d'origine

La description telle que publiée par la source (souvent en anglais).

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 issue is fixed in versions 2.1.13 and 2.2.2-alpha.

Source: OSV.dev (Open Source Vulnerabilities) OSV

Paquets affectés

Ubuntu:Pro:18.04:LTS libevent

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.1.8-stable-4ubuntu0.1~esm1"}]}]

Ubuntu:Pro:20.04:LTS libevent

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.1.11-stable-1ubuntu0.1~esm1"}]}]

Ubuntu:22.04:LTS libevent

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.1.12-stable-1ubuntu0.1"}]}]

Ubuntu:24.04:LTS libevent

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.1.12-stable-9ubuntu2.1"}]}]

Ubuntu:26.04:LTS libevent

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.1.12-stable-10ubuntu0.1"}]}]

Références

advisory ubuntu.com
report ubuntu.com
report cve.org