CVE-2026-49494

Katalog CVE

CVSS 7.5 · High EPSS 0,79%

Kerentanan Integer Underflow (Wrap or Wraparound). Skor CVSS 3.1 7.5 (High) menurut vulncheck.com.

Deskripsi (NVD)

Xcitium Client Security (XCS) before 13.8.2.10019 and Comodo Internet Security (CIS) through 12.3.4.8162 (fix expected by 2026 Q3) contain an integer underflow vulnerability in the firewall driver Inspect.sys that allows remote unauthenticated attackers to crash the system by sending a crafted IPv6 packet with a declared payload length smaller than the sum of its extension-header lengths. The unsigned 64-bit payload-length value underflows to a near-maximal integer, triggering an out-of-bounds read and oversized memcpy in the Windows kernel at DISPATCH_LEVEL, resulting in a blue screen of death even on hosts with all ports blocked.

Rincian

Terbit di NVD

7 Juni 2026

Terakhir diubah

23 Juli 2026

Status NVD

Deferred

CVSS 3.1

7.5 (High), sumber vulncheck.com
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-191: Integer Underflow (Wrap or Wraparound)

EPSS (30 hari)

0,79% peluang dieksploitasi; lebih tinggi dari 55,1% 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/MalwareTech/ComoDoS
• https://malwaretech.com/2026/06/exploiting-a-remote-kernel-vulnerability-in-comodo-internet-security.html
• https://updates.xcitium.com/#note11312
• https://www.vulncheck.com/advisories/xcitium-client-security-comodo-internet-security-remote-dos