CVE-2026-19033VulnerabilityPublished 7 Oct 2026Updated 10 Nov 2026

SUSE · Security update for bind

Affects SUSESource GCVE Database

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Mentioned vulnerabilities

Authoritative record:CVE-2026-19033· Medium 6.5

Not known to be exploited · CVSS 6.5 Medium.

Data as of 10 Nov 2026, 20:06 UTC

CVSS 3.1 base score

6.5Medium

How severe the flaw is on the 0–10 CVSS scale.

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

Attack Vector: Network
Attack Complexity: High
Privileges Required: None
User Interaction: None
Scope: Unchanged
Confidentiality: None
Integrity: High
Availability: Low

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Network: The vulnerable component is bound to the network stack and the set of possible attackers extends beyond the other options listed, up to and including the entire Internet. Such a vulnerability is often termed 'remotely exploitable' and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).
Attack Complexity: High: A successful attack depends on conditions beyond the attacker's control. That is, a successful attack cannot be accomplished at will, but requires the attacker to invest in some measurable amount of effort in preparation or execution against the vulnerable component before a successful attack can be expected. For example, a successful attack may require an attacker to: gather knowledge about the environment in which the vulnerable target/component exists; prepare the target environment to improve exploit reliability; or inject themselves into the logical network path between the target and the resource requested by the victim in order to read and/or modify network communications (e.g., a man in the middle attack).
Privileges Required: None: The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files to carry out an attack.
User Interaction: None: The vulnerable system can be exploited without any interaction from any user.
Scope: Unchanged: An exploited vulnerability can only affect resources managed by the same security authority. In this case, the vulnerable component and the impacted component are either the same, or both are managed by the same security authority.
Confidentiality: None: There is no loss of confidentiality within the impacted component.
Integrity: High: There is a total loss of integrity, or a complete loss of protection. For example, the attacker is able to modify any/all files protected by the impacted component. Alternatively, only some files can be modified, but malicious modification would present a direct, serious consequence to the impacted component.
Availability: Low: Performance is reduced or there are interruptions in resource availability. Even if repeated exploitation of the vulnerability is possible, the attacker does not have the ability to completely deny service to legitimate users. The resources in the impacted component are either partially available all of the time, or fully available only some of the time, but overall there is no direct, serious consequence to the impacted component.

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 16 Sep 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 10 Nov 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Affected software

Product	Affected	Fixed in
ISCBIND 9	Affected >=9.11.0 <=9.18.50 >=9.20.0 <=9.20.27 >=9.21.0 <=9.21.25 >=9.11.3-S1 <=9.18.50-S1 >=9.20.9-S1 <=9.20.27-S1	Fixed in–
GitHubisc/bind9`pkg:github/isc/bind9`Other threats	Affected >=9.11.0 <=9.18.50 >=9.20.0 <=9.20.27 >=9.21.0 <=9.21.25 >=9.11.3-S1 <=9.18.50-S1 >=9.20.9-S1 <=9.20.27-S1	Fixed in–

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Description

This update for bind fixes the following issues: - CVE-2026-19033: Unauthenticated IXFR deltas are applied to the live zone before TSIG verification (bsc#1280430). - CVE-2026-19662: qpcache NOQNAME proof use-after-free crashes recursive resolver (bsc#1280432). - CVE-2026-19666: Use-after-free in query_addnoqnameproof() via the DNS64 filter64 path (bsc#1280433). - CVE-2026-19667: Remote assertion failure via 16-bit length truncation in dns_ncache_add() (bsc#1280435). - CVE-2026-19668: Resource Exhaustion via Excessive DNSSEC Cryptographic Material Matching (bsc#1280436). - CVE-2026-19941: checkwildcard() accepts an out-of-zone NSEC as a wildcard-nonexistence proof (bsc#1280437). - CVE-2026-75029: Message parser retains every identical singleton RDATA, enabling wire-to-work amplification (bsc#1280438). - CVE-2026-76163: named aborts on a TKEY query when the user configuration has no global options statement (bsc#1280439). - CVE-2026-77119: NSEC3 insecure-referral proof can use unrelated cached NSEC3 RRsets (bsc#1280440). - CVE-2026-77692: Unauthenticated remote crash of named via a single DoH SIG(0) request (bsc#1280441). - CVE-2026-78301: Out-of-zone database nodes can become authoritative zone cuts (bsc#1280442). - CVE-2026-80274: Validating resolver can abort while caching a mismatched NOQNAME proof (bsc#1280443). - CVE-2026-81563: SVCB AliasMode additional-data error leaks qpcache references (bsc#1280444). - CVE-2026-81736: Remote CPU denial of service through cached SVCB/HTTPS AliasMode trees (bsc#1280445). Changes for bind: - Upgrade to release 9.20.29 Feature Changes: * Reject oversized and malformed DNSKEY records up front. * Speed up RPZ policy zone updates. Bug Fixes: * Prevent a crash when using both dns64 and filter-a. * Stop passing UDP client addresses to update-policy external helpers. * Missing required NSEC3 for delegation not detected. * Tighten EUI48 and EUI64 text parsing. * GeoIP ACL state could be stale or wrong after reload. * Honor DNSSEC policy key tag ranges. * Fix a double free in mdig when EDNS options are specified. * Fix a crash when an IXFR falls back to AXFR with updates still pending. * Fix DS requests to parental agents over TLS. * Fix the rndc-confgen -q (quiet) option. * Enforce query ACLs for redirect zones and searched DLZs. * Check asnum validity in GeoIP ACLs. * Fix a crash on remote-servers lists that reference themselves. * A record from outside a response policy zone could crash named. * Invalid key-store configuration could abort the DNSSEC tools. * NSEC signature set could bypass the secure-delegation check. * Fix a possible nsupdate issue when using GSS-TSIG. * Fix a crash with a single-element geoip sortlist. * Prevent out-of-bailiwick CNAMEs from evicting cached records. * Restore periodic cleanup of stale resolver address data. * Fix named-checkconf/named crash with malformed key name. * Prevent resolver crashes while processing DNS over TCP. * Ensure NSEC authority does not cross zonecut boundary. * Treat an unusable NSEC3 chain as a verification failure. * Treat non-canonical RPZ prefixes as any other failure. * Negative caching stopped working with stale-answer-client-timeout set to 0. * An unterminated OpenSSL private-key Label: field could be read past its parser buffer. * Restore SMF support on Solaris and illumos. * Fix compilation on GNU/Hurd. * dig +yaml was producing invalid YAML when a lookup failed. * Properly prevent TSIG generation command line injection attacks. * Fix a potential heap bounds overflow write in dnssec-signzone. * Fix crashes on invalid DNSTAP input in dnstap-read.

References

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