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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 sendin…

中危 CVSS 5.3
CVECVE-2026-5950
首次发现2026-07-23 12:30 UTC
披露时间2026-05-20 13:16 UTC
最后更新2026-07-23 12:30 UTC
通道状态auto

摘要

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.

中文摘要建设中,暂以英文摘要呈现(DR-003 v2)。

深度研判 · 自动通道

该漏洞尚未生成深度研判报告(DR-003 v2 AI pipeline 建设中)。

受影响产品

  • :
Lint 边界警告 (4)

以下是本次研判 lint 阶段发现的非阻塞性警告(如引用 URL 未在白名单内)。这些不影响漏洞条目可用性,仅为透明度披露(参 DR-002)。

  • REF_URL_NOT_ALLOWLISTED url not in allowlist: https://downloads.isc.org/isc/bind9/9.18.49
  • REF_URL_NOT_ALLOWLISTED url not in allowlist: https://downloads.isc.org/isc/bind9/9.20.23
  • REF_URL_NOT_ALLOWLISTED url not in allowlist: https://downloads.isc.org/isc/bind9/9.21.22
  • REF_URL_NOT_ALLOWLISTED url not in allowlist: https://kb.isc.org/docs/cve-2026-5950

数据来源

  • NVD DATABASE

原始链接

时间线

  1. nvd_ingest NVD