CVE-2026-63383

Katalog CVE

CVSS 8.7 · High EPSS 0,49%

Kerentanan Out-of-bounds Read. Skor CVSS 4.0 8.7 (High) menurut github.com.

Deskripsi (NVD)

Libevent is an event notification library. Prior to 2.1.13 and 2.2.2-alpha, libevent can read beyond a contiguous evbuffer region in event_tagging.c when decode_tag_internal requests at most five bytes from evbuffer_pullup but iterates using the full logical buffer length. A fragmented evbuffer containing a six-byte malformed tag can therefore advance past the pullup window and trigger an out-of-bounds read, which can crash a process that decodes attacker-controlled tagged RPC data. This issue is fixed in versions 2.1.13 and 2.2.2-alpha.

Rincian

Terbit di NVD

20 Agustus 2026

Terakhir diubah

9 September 2026

Status NVD

Awaiting Analysis

CVSS 4.0

8.7 (High), sumber github.com
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-125: Out-of-bounds Read

EPSS (30 hari)

0,49% peluang dieksploitasi; lebih tinggi dari 40,3% CVE lain

Produk dan versi terdampak

NVD belum mencantumkan data produk (CPE) untuk CVE ini. Produk yang terdampak biasanya disebut di deskripsi dan di advisory vendor pada daftar referensi.

Referensi dan perbaikan

• https://github.com/libevent/libevent/commit/91ed8745eebabdd27592a83d350338a8c4626321
• https://github.com/libevent/libevent/commit/e1f9e21887c6b104e206a718385ba3ffc75180cb
• https://github.com/libevent/libevent/releases/tag/release-2.1.13-stable
• https://github.com/libevent/libevent/releases/tag/release-2.2.2-alpha
• https://github.com/libevent/libevent/security/advisories/GHSA-fj29-64w6-73h6