CVE-2026-5950

תיאור (מקור, אנגלית)

An unbounded resend loop vulnerability exists in the BIND 9 resolver state machine during bad-server handling, enabling a remote unauthenticated attacker to cause severe resource exhaustion by sending queries that trigger specific retry conditions. This issue affects BIND 9 versions 9.18.36 through 9.18.48, 9.20.8 through 9.20.22, 9.21.7 through 9.21.21, 9.18.36-S1 through 9.18.48-S1, and 9.20.9-S1 through 9.20.22-S1.

מדדים

CVSS 3.1

5.3 (MEDIUM) מקור הציון: CNA CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

EPSS — סבירות ניצול

1% (אחוזון 000) נכון ל-5/8/2026

CWE

CWE-606

מוצרים מושפעים

isc: bind

קישורים

• https://kb.isc.org/docs/cve-2026-5950 Vendor Advisory
• https://downloads.isc.org/isc/bind9/9.18.49 Patch
• https://downloads.isc.org/isc/bind9/9.20.23 Patch
• https://downloads.isc.org/isc/bind9/9.21.22 Patch