Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1336 CNY

100%
Buy Us a Coffee

CVE-2026-75029— Message parser retains every identical singleton RDATA, enabling wire-to-work amplification

Quick assessment

Affected
ISC BIND 9
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在DNS查询响应中，攻击者可能多次发送本应只存在一次的记录（例如SOA记录）的多个副本。如果所有副本的RDATA内容相同，这些记录会被添加到内存中的RDATA集合中，这可能导致负缓存的内存占用增加，并可能引发其他内存攻击向量。 此问题影响以下BIND 9版本： 9.11.0 至 9.18.50 9.20.0 至 9.20.27 9.21.0 至 9.21.25 9.11.3-S1 至 9.18.50-S1 9.20.9-S1 至 9.20.27-S1

CVSS 5.3 · Medium
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-75029

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
Message parser retains every identical singleton RDATA, enabling wire-to-work amplification
Source: CVE Program / CVE List V5
Vulnerability Description
In a query response, an attacker may send `named` multiple copies of a record that should only exist once (such as an SOA record). If the RDATA is the same on all the copies, the record is appended to the in-memory RDATA set, which can cause increased memory usage of the negative cache and possibly lead to other memory attack vectors. This issue affects BIND 9 versions 9.11.0 through 9.18.50, 9.20.0 through 9.20.27, 9.21.0 through 9.21.25, 9.11.3-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.27-S1.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
不对称的资源消耗(放大攻击)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
ISC BIND 9 9.11.0 ~ 9.18.50 -

II. Public POCs for CVE-2026-75029

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-75029

请登录查看更多情报信息。

Vendor Advisories for CVE-2026-75029 (1)

Vendor Pages for CVE-2026-75029 (2)

Same Patch Batch · ISC · 2026-09-16 · 14 CVEs total

CVE-2026-81736 7.5 HIGH Remote CPU denial of service through cached SVCB/HTTPS AliasMode trees
CVE-2026-19667 7.5 HIGH Remote assertion failure via 16-bit length truncation in `dns_ncache_add()`
CVE-2026-77692 7.5 HIGH Unauthenticated remote crash of named via a single DoH SIG(0) request
CVE-2026-81563 7.5 HIGH SVCB AliasMode additional-data error leaks qpcache references
CVE-2026-19666 7.5 HIGH Use-after-free in query_addnoqnameproof() via the DNS64 filter64 path
CVE-2026-80274 7.5 HIGH Validating resolver can abort while caching a mismatched NOQNAME proof
CVE-2026-76163 7.5 HIGH named aborts on a TKEY query when the user configuration has no global options statement
CVE-2026-19033 6.5 MEDIUM Unauthenticated IXFR deltas are applied to the live zone before TSIG verification
CVE-2026-19662 5.9 MEDIUM qpcache NOQNAME proof use-after-free crashes recursive resolver
CVE-2026-19941 5.9 MEDIUM checkwildcard() accepts an out-of-zone NSEC as a wildcard-nonexistence proof
CVE-2026-77119 5.9 MEDIUM NSEC3 insecure-referral proof can use unrelated cached NSEC3 RRsets
CVE-2026-78301 5.8 MEDIUM Out-of-zone database nodes can become authoritative zone cuts
CVE-2026-19668 5.3 MEDIUM Resource Exhaustion via Excessive DNSSEC Cryptographic Material Matching

IV. Related Vulnerabilities

Same product: BIND 9
Same vendor: ISC
Same weakness: CWE-405

V. Comments for CVE-2026-75029

No comments yet

Leave a comment