CVE-2026-5946

Published May 20, 2026

Last updated 17 days ago

Overview

Description
Multiple flaws have been identified in `named` related to the handling of DNS messages whose CLASS is not Internet (`IN`) — for example, `CHAOS` or `HESIOD`, or DNS messages that specify meta-classes (`ANY` or `NONE`) in the question section. Specially crafted requests reaching the affected code paths — recursion, dynamic updates (`UPDATE`), zone change notifications (`NOTIFY`), or processing of `IN`-specific record types in non-`IN` data — can cause assertion failures in `named`. This issue affects BIND 9 versions 9.11.0 through 9.16.50, 9.18.0 through 9.18.48, 9.20.0 through 9.20.22, 9.21.0 through 9.21.21, 9.11.3-S1 through 9.16.50-S1, 9.18.11-S1 through 9.18.48-S1, and 9.20.9-S1 through 9.20.22-S1.
Source
security-officer@isc.org
NVD status
Analyzed
Products
bind

Risk scores

CVSS 3.1

Type
Primary
Base score
7.5
Impact score
3.6
Exploitability score
3.9
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Severity
HIGH

Weaknesses

security-officer@isc.org
CWE-20

Social media

Hype score
Not currently trending
  1. 【BINDに複数脆弱性、DNS運用者は更新確認を】 JVNは、BINDに複数の脆弱性が存在すると公表しました。 対象には CVE-2026-3039、CVE-2026-3592、CVE-2026-3593、CVE-2026-5946、CVE-2026-5947、CVE-2026-5950 が含まれ、サービス運用

    @01ra66it

    25 May 2026

    209 Impressions

    1 Retweet

    2 Likes

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  2. 【ISC BINDに複数脆弱性、DNS可用性への影響に注意】 JVNは、ISC BINDにおける複数の脆弱性を公開しました。対象にはCVE-2026-3039、CVE-2026-3592、CVE-2026-3593、CVE-2026-5946、CVE-2026-5947、CVE-2026-5950が含まれ、DoS、メモリ破

    @01ra66it

    23 May 2026

    167 Impressions

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  3. 【BIND 9に複数脆弱性、DNS運用者は更新確認を】 JVNは、ISC BINDにおける複数の脆弱性を公表しました。対象にはCVE-2026-3039、CVE-2026-3592、CVE-2026-3593、CVE-2026-5946、CVE-2026-5947、CVE-2026-5950が含まれます。

    @01ra66it

    21 May 2026

    202 Impressions

    0 Retweets

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  4. JVNVU#99225456: ISC BINDにおける複数の脆弱性(2026年5月) https://t.co/CVPAVe4C8c "遠隔の攻撃者によって、サービス運用妨害(DoS)攻撃を引き起こされる(CVE-2026-3039、CVE-2026-3592、CVE-2026-5946、CVE-2026-5947、CVE-2026-5950)" h

    @catnap707

    21 May 2026

    181 Impressions

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  5. BIND9の脆弱性(High: CVE-2026-3039, CVE-2026-3593, CVE-2026-5946, CVE-2026-5947, Medium: CVE-206-3592, CVE-206-5950)と9.18.49, 9.20.23, 9.21.22公開 #sios_tech #security #vulnerability #セキュリティ #脆弱性 #dns #bind https://t.co/C3ftLMSEDR

    @omokazuki

    20 May 2026

    306 Impressions

    4 Retweets

    2 Likes

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