Input validation error in ISC BIND - CVE-2026-10822

Vulnerability identifier: #VU139213

CSH Severity: Medium

CVSS v4: 6.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-10822

CWE-ID: CWE-20

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to improper input validation in DNS record text rendering when processing a stored DNS record with a PRIVATEDNS algorithm identifier length longer than the actual identifier data. A remote attacker can supply a specially crafted DNS record to cause a denial of service.

User interaction is required for BIND to later render the stored record to text.

ISC BIND
Debian Linux
SUSE Linux Enterprise Server 15 SP6
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Desktop 15
SUSE Linux Enterprise Real Time 15
Basesystem Module
Server Applications Module
openSUSE Leap
Ubuntu
Anolis OS
openEuler
Fedora
bind-debugsource
bind
bind-chroot
bind-debuginfo
bind-devel
bind-dnssec-utils
bind-libs
bind-utils
bind-dnssec-doc
bind-license
bind9 (Ubuntu package)
bind-doc
bind-utils-debuginfo
bind9 (Debian package)

Install security update from vendor's website.

ISC BIND - addressed in versions 9.20.26, 9.20.26-s1, 9.21.24
bind-debugsource - addressed in versions 9.18.21-11, 9.20.21-4
bind - addressed in versions 9.18.21-11, 9.20.21-4
bind-chroot - addressed in versions 9.18.21-11, 9.20.21-4
bind-debuginfo - addressed in versions 9.18.21-11, 9.20.21-4
bind-devel - addressed in versions 9.18.21-11, 9.20.21-4
bind-dnssec-utils - addressed in versions 9.18.21-11, 9.20.21-4
bind-libs - addressed in versions 9.18.21-11, 9.20.21-4
bind-utils - addressed in versions 9.18.21-11, 9.20.21-4
bind-dnssec-doc - addressed in versions 9.18.21-11, 9.20.21-4
bind-license - addressed in versions 9.18.21-11, 9.20.21-4
bind9 (Ubuntu package) - addressed in versions 1:9.18.39-0ubuntu0.22.04.5, 1:9.18.39-0ubuntu0.24.04.6, 1:9.20.24-1ubuntu0.2
bind - addressed in versions 9.18.50-2.fc43, 9.18.50-2.fc44, 9.18.50-34.fc45
bind-doc - addressed in versions 9.18.50-150600.3.32.1, 9.20.26-150700.3.29.1
bind-utils-debuginfo - addressed in versions 9.18.50-150600.3.32.1, 9.20.26-150700.3.29.1
bind-debugsource - addressed in versions 9.18.50-150600.3.32.1, 9.20.26-150700.3.29.1
bind - addressed in versions 9.18.50-150600.3.32.1, 9.20.26-150700.3.29.1
bind-debuginfo - addressed in versions 9.18.50-150600.3.32.1, 9.20.26-150700.3.29.1
bind-utils - addressed in versions 9.18.50-150600.3.32.1, 9.20.26-150700.3.29.1
bind-devel - update to 9.20.26-1
bind-license - update to 9.20.26-1
bind-doc - update to 9.20.26-1
bind-dnssec-doc - update to 9.20.26-1
bind-utils - update to 9.20.26-1
bind-libs - update to 9.20.26-1
bind-dnssec-utils - update to 9.20.26-1
bind-chroot - update to 9.20.26-1
bind - update to 9.20.26-1
bind9 (Debian package) - update to 1:9.20.26-1~deb13u1

• https://kb.isc.org/docs/cve-2026-10822-key-record-using-privatedns-algorithm-may-lead-to-unexpected-exit
• https://kb.isc.org/docs/cve-2026-10822

• Multiple vulnerabilities in ISC BIND
• Debian update for bind9
• SUSE update for bind
• SUSE update for bind
• openEuler 24.03 LTS SP1 update for bind
• openEuler 24.03 LTS SP4 update for bind
• openEuler 24.03 LTS SP3 update for bind
• Anolis OS update for bind
• Ubuntu update for bind9
• Fedora 45 update for bind
• Fedora 44 update for bind
• Fedora 43 update for bind