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    CVE-2026-94300

    Replaying GSS-TSIG signed UDP messages can result in memory corruption in "`named`". An attacker who can capture a previously signed UDP message can replay it while the negotiated TSIG key is still valid. By also sending crafted queries to a zone the attacker controls, the attacker may potentially achieve remote code execution. This issue affects BIND 9 versions 9.11.0 through 9.18.50, 9.20.0 through 9.20.29, 9.21.0 through 9.21.26, 9.11.3-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.29-S1.

    Published:Oct 21, 2026
    Last Modified:Oct 22, 2026
    EPS:Oct 21, 2026
    EPSS Score:0.00734
    CVSS Score:8.1

    Affected Products

    Vendor
    Isc
    Product
    Bind
    Vendor
    Isc
    Product
    Bind 9
    Vendor
    Redhat
    Product
    Hummingbird

    Exploits

    https://github.com/Ibonok/CVE-2026-94300

    Related CVEs

    CVE-2026-97313 (CVSS 7.5) — A recursive BIND server that receives a query with recursion desired (RD=1) followed by a non-recursive query …
    CVE-2026-96888 (CVSS 7.5) — A BIND resolver that is configured with both a "redirect" zone and "qname-minimization strict" may abort with …
    CVE-2026-19630 (CVSS 7.5) — In a BIND resolver, inbound DNS protocol messages with a particular structure will result in additional proces…
    CVE-2026-77119 (CVSS 5.9) — A validly signed NSEC3 from an unrelated sibling zone may be accepted as an insecurity proof, downgrading a se…
    CVE-2026-75029 (CVSS 5.3) — In a query response, an attacker may send `named` multiple copies of a record that should only exist once (suc…
    CVE-2026-19668 (CVSS 5.3) — A BIND recursive resolver may experience excessive resource consumption if it encounters large numbers of a pa…
    CVE-2026-19033 (CVSS 6.5) — For a secondary zone with transfers restricted by TSIG, `named` may start to serve the data provided in a zone…
    CVE-2026-80274 (CVSS 7.5) — If a BIND resolver sends a query for a DNSSEC-signed authoritative zone, and the authoritative server replies …
    CVE-2026-76163 (CVSS 7.5) — If BIND is loaded with a "`named.conf`" file that contains no global "`options`" block, an attacker can send a…
    CVE-2026-19666 (CVSS 7.5) — On a resolver configured to use ``dns64``, if an applicable answer from the authoritative server is malformed …

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High