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Reachable AssertionWeakness · CWE-617

CVE-2026-10822

MEDIUM · 6.5 CVSS v3.1 Developing Published 2026-07-22
No fix yet
No fix has been published. The vendor has not shipped a fixed release or patch. You remain exposed.
See remediation →
72/100
Remediation priority · Elevated
Remotely reachable No privileges 4 weeks old

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
If BIND encounters a particular invalid data structure in a DNS record, it will accept the invalid data, and may subsequently abort and exit. BIND will first need to store a DNS record for a key (KEY, DNSKEY, etc.). That key must specify a PRIVATEDNS algorithm (253), and in the algorithm identifier, improperly give a length longer than the actual identifier data. The invalid identifier will be stored. If BIND later needs to render that record to text, it will use the invalid length during processing, leading to a consistency check failing. This issue affects BIND 9 versions 9.18.0 through 9.18.50, 9.20.0 through 9.20.24, 9.21.0 through 9.21.23, 9.18.11-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.24-S1.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · low confidence
Developing — this CVE was published recently and its authoritative NVD entry is still being established, so we're holding a technical summary until the source data settles rather than publish something unreliable. Re-checking after 2026-08-05.

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Recommended fix Moderate confidence

BIND 9.18.51, 9.20.25, 9.21.24, or later stable releases (any version after the highest affected version listed)

  1. 1. Identify the current BIND version installed by running 'named -v' or 'bind -v'
  2. 2. Obtain the appropriate updated BIND 9 package from your operating system's package manager or from ISC downloads at downloads.isc.org
  3. 3. For RHEL/CentOS/Fedora: run 'yum update bind' or 'dnf update bind'
  4. 4. For Debian/Ubuntu: run 'apt update && apt install bind9'
  5. 5. For FreeBSD: run 'portmaster dns/bind99' or 'pkg upgrade bind99'
  6. 6. After installation, verify the new version with 'named -v' to confirm it matches a fixed release (9.18.51+, 9.20.25+, 9.21.24+, or later)
  7. 7. Test DNS functionality and zone file loading in a staging environment before deploying to production
  8. 8. Restart the named service using 'systemctl restart named' or 'service named restart'
Caveat Upgrade within same major version (9.x) typically has minimal breaking changes; review ISC Release Notes for any configuration or behavior changes between your current and new version

Generated from the published advisory — verify against the referenced sources before acting.

No vendor fix exists The vendor has not published a patch for this.

There is no version to upgrade to and no patch to apply. Every affected install stays exposed until the vendor ships a fix — or somebody else builds one.

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2026-10822 in production — separate from our analysis above.

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