Bug 2535872 - CVE-2026-78301 bind: BIND: DNS cache poisoning via malformed zone insertion [fedora-all]
Summary: CVE-2026-78301 bind: BIND: DNS cache poisoning via malformed zone insertion [...
Keywords:
Status: ON_QA
Alias: None
Product: Fedora
Classification: Fedora
Component: bind
Version: rawhide
Hardware: Unspecified
OS: Unspecified
medium
medium
Target Milestone: ---
Assignee: Petr Menšík
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard: {"flaws": ["0c929c8a-2e45-491a-b8bd-7...
Depends On:
Blocks: CVE-2026-78301
TreeView+ depends on / blocked
 
Reported: 2026-09-17 08:50 UTC by Vladimir Vasilev
Modified: 2026-10-20 04:45 UTC (History)
5 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Type: ---
Embargoed:


Attachments (Terms of Use)

Description Vladimir Vasilev 2026-09-17 08:50:58 UTC
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.

A malformed zone may contain an NS or DNAME node above its origin, which `named` treats as a zone cut. If an attacker inserts a malformed zone into a BIND authoritative server (e.g., via zone transfer), queries for names inside the configured zone then lose authoritative status and return an out-of-zone delegation. On a server that also provides recursion BIND can follow this locally sourced cut and cache attacker-supplied data, affecting names outside the configured zone. This situation persists as long as the malformed zone remains in the zone database.
This issue affects BIND 9 versions 9.11.0 through 9.18.50, 9.20.0 through 9.20.27, 9.21.0 through 9.21.25, 9.11.3-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.27-S1.

Comment 1 Fedora Update System 2026-10-16 13:12:35 UTC
FEDORA-2026-aba85b9a89 (bind-9.18.51^git20261003.d0a87358-2.fc43 and bind-dyndb-ldap-11.11-15.fc43) has been submitted as an update to Fedora 43.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-aba85b9a89

Comment 2 Fedora Update System 2026-10-16 13:15:28 UTC
FEDORA-2026-a5b5298a84 (bind-9.18.51^git20261003.d0a87358-2.fc44 and bind-dyndb-ldap-11.11-17.fc44) has been submitted as an update to Fedora 44.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-a5b5298a84

Comment 3 Fedora Update System 2026-10-16 15:22:50 UTC
FEDORA-2026-468290e984 (bind-9.18.51^git20261003.d0a87358-11.fc45 and bind-dyndb-ldap-11.11-18.fc45) has been submitted as an update to Fedora 45.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-468290e984

Comment 4 Fedora Update System 2026-10-16 16:39:42 UTC
FEDORA-2026-56974571ee (bind-9.18.51^git20261003.d0a87358-11.fc46 and bind-dyndb-ldap-11.11-18.fc46) has been submitted as an update to Fedora 46.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-56974571ee

Comment 5 Fedora Update System 2026-10-17 01:56:55 UTC
FEDORA-2026-468290e984 has been pushed to the Fedora 45 testing repository.
Soon you'll be able to install the update with the following command:
`sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2026-468290e984`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-468290e984

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.

Comment 6 Fedora Update System 2026-10-17 02:26:09 UTC
FEDORA-2026-a5b5298a84 has been pushed to the Fedora 44 testing repository.
Soon you'll be able to install the update with the following command:
`sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2026-a5b5298a84`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-a5b5298a84

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.

Comment 7 Fedora Update System 2026-10-17 02:48:47 UTC
FEDORA-2026-aba85b9a89 has been pushed to the Fedora 43 testing repository.
Soon you'll be able to install the update with the following command:
`sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2026-aba85b9a89`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-aba85b9a89

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.

Comment 8 Fedora Update System 2026-10-19 18:04:37 UTC
FEDORA-2026-56974571ee (bind-9.18.51^git20261003.d0a87358-12.fc46 and bind-dyndb-ldap-11.11-18.fc46) has been pushed to the Fedora 46 stable repository.
If problem still persists, please make note of it in this bug report.

Comment 9 Fedora Update System 2026-10-20 04:31:14 UTC
FEDORA-2026-468290e984 has been pushed to the Fedora 45 testing repository.
Soon you'll be able to install the update with the following command:
`sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2026-468290e984`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-468290e984

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.

Comment 10 Fedora Update System 2026-10-20 04:45:08 UTC
FEDORA-2026-a5b5298a84 (bind-9.18.51^git20261003.d0a87358-2.fc44 and bind-dyndb-ldap-11.11-17.fc44) has been pushed to the Fedora 44 stable repository.
If problem still persists, please make note of it in this bug report.


Note You need to log in before you can comment on or make changes to this bug.