Story · 2 sources · 2 articlesfirst Oct 21, 15:21 UTCupdated Oct 21, 18:48 UTC (1d ago)

ISC BIND security advisory (AV26-1072)

mediumAdvisoryimportance 35CVE-2026-19630 CVE-2026-94300 CVE-2026-96888 CVE-2026-97313

Merged summary · from the lead article

Serial number: AV26-1072 Date: October 21, 2026 As of October 21, 2026, ISC is affected by a vulnerability in the following products: BIND 9 Versions 9.11.0 to 9.18.50 Versions 9.11.0 to 9.18.50 ◦ Versions 9.21.0 to 9.21.26 BIND Supported Preview Edition Versions 9.11.3-S1 to 9.18.50-S1 Versions 9.20.9-S1 to 9.20.29-S1 The Cyber Centre encourages users and administrators to review the provided…

Coverage timelineoldest first · each row is one article

Oct 21, 15:21 UTC · 1d ago
oss-security· 32
ISC has disclosed four vulnerabilities in BIND 9 (CVE-2026-19630, CVE-2026-94300, CVE-2026-96888, CVE-2026-97313)
Oct 21, 18:48 UTC · 1d ago
Canadian Centre for Cyber Security· 35
ISC BIND security advisory (AV26-1072)

Vulnerabilities in this storyAll →

CVE-2026-196307.5—
In a BIND resolver, inbound DNS protocol messages with a particular structure will result in additional processing, with no limit imposed by BIND
published 1d ago
CVE-2026-943008.1—
Replaying GSS-TSIG signed UDP messages can result in memory corruption in "`named`"
published 1d ago
CVE-2026-96888

CVE	Vulnerability	CVSS	EPSS	Affected	Exposure	Published
CVE-2026-19630	In a BIND resolver, inbound DNS protocol messages with a particular structure will result in additional processing, with no limit imposed by BIND In a BIND resolver, inbound DNS protocol messages with a particular structure will result in additional processing, with no limit imposed by BIND. A DNS message with a maliciously large number of such structures will cause BIND to consume disproportionate amounts of CPU time and memory during processing. 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. NVD description · AI analysis pending	7.5	—	—	—	1d ago
CVE-2026-94300	Replaying GSS-TSIG signed UDP messages can result in memory corruption in "`named`" 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. NVD description · AI analysis pending	8.1	—	—	—	1d ago
CVE-2026-96888	A BIND resolver that is configured with both a "redirect" zone and "qname-minimization strict" may abort with an assertion failure while processing the redirect A BIND resolver that is configured with both a "redirect" zone and "qname-minimization strict" may abort with an assertion failure while processing the redirect. This issue affects BIND 9 versions 9.16.0 through 9.18.50, 9.20.0 through 9.20.29, 9.21.0 through 9.21.26, 9.16.8-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.29-S1. NVD description · AI analysis pending	7.5	—	—	—	1d ago
CVE-2026-97313	A recursive BIND server that receives a query with recursion desired (RD=1) followed by a non-recursive query (RD=0) may exit with an assertion failure… A recursive BIND server that receives a query with recursion desired (RD=1) followed by a non-recursive query (RD=0) may exit with an assertion failure, resulting in a denial of service. To be vulnerable, the BIND server must allow recursive queries and have at least two RPZ zones configured: one with the default setting of "recursive-only yes", and the other with "recursive-only no". This issue affects BIND 9 versions 9.16.0 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. NVD description · AI analysis pending	7.5	—	—	—	1d ago

CVE

Vulnerability

CVSS

EPSS

Flags

Affected

Exposure

Published

CVE-2026-19630

In a BIND resolver, inbound DNS protocol messages with a particular structure will result in additional processing, with no limit imposed by BIND

In a BIND resolver, inbound DNS protocol messages with a particular structure will result in additional processing, with no limit imposed by BIND. A DNS message with a maliciously large number of such structures will cause BIND to consume disproportionate amounts of CPU time and memory during processing. 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.

NVD description · AI analysis pending

7.5

—

1d ago

CVE-2026-94300

Replaying GSS-TSIG signed UDP messages can result in memory corruption in "`named`"

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.

NVD description · AI analysis pending

8.1

—

1d ago

CVE-2026-96888

A BIND resolver that is configured with both a "redirect" zone and "qname-minimization strict" may abort with an assertion failure while processing the redirect

A BIND resolver that is configured with both a "redirect" zone and "qname-minimization strict" may abort with an assertion failure while processing the redirect. This issue affects BIND 9 versions 9.16.0 through 9.18.50, 9.20.0 through 9.20.29, 9.21.0 through 9.21.26, 9.16.8-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.29-S1.

NVD description · AI analysis pending

7.5

—

1d ago

CVE-2026-97313

A recursive BIND server that receives a query with recursion desired (RD=1) followed by a non-recursive query (RD=0) may exit with an assertion failure…

A recursive BIND server that receives a query with recursion desired (RD=1) followed by a non-recursive query (RD=0) may exit with an assertion failure, resulting in a denial of service. To be vulnerable, the BIND server must allow recursive queries and have at least two RPZ zones configured: one with the default setting of "recursive-only yes", and the other with "recursive-only no". This issue affects BIND 9 versions 9.16.0 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.

NVD description · AI analysis pending

7.5

—

1d ago