CVE-2026-94300
published 2026-10-21CVE-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…
PriorityP357high8.1CVSS 3.1
AVNACHPRNUINSUCHIHAH
EPSS
0.95%
61.1th percentile
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.
Affected
9 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| isc | bind | — | — |
| isc | bind_9 | 9.11.0 – 9.18.50 | — |
| isc | bind_9 | 9.11.3-S1 – 9.18.50-S1 | — |
| isc | bind_9 | 9.20.0 – 9.20.29 | — |
| isc | bind_9 | 9.20.9-S1 – 9.20.29-S1 | — |
| isc | bind_9 | 9.21.0 – 9.21.26 | — |
| isc | dhcp | — | — |
| openshift | ose-rhel-coreos-8 | — | — |
| openshift | ose-rhel-coreos-9 | — | — |
CVSS provenance
nvdv3.18.1HIGHCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
vendor_redhat8.1HIGH
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GHSA
Replaying GSS-TSIG signed UDP messages can result in memory corruption in "`named`".
ghsa_unreviewed·2026-10-21
CVE-2026-94300 [HIGH] CWE-362 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.
Red Hat
bind: bind: Arbitrary code execution via GSS-TSIG UDP message replay
vendor_redhat·2026-10-21·CVSS 8.1
CVE-2026-94300 [HIGH] CWE-366 bind: bind: Arbitrary code execution via GSS-TSIG UDP message replay
bind: bind: Arbitrary code execution via GSS-TSIG UDP message replay
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.
A flaw was found in BIND. This vulnerability may allow a remote attacker to achieve arbitrary code execution on the target server. An attacker who captures a valid User Datagram Protocol (UDP) message signed with Generic Securit
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2026-94300 dhcp: bind: Arbitrary code execution via GSS-TSIG UDP message replay [fedora-all]
bugzilla·2026-10-21·CVSS 8.1
CVE-2026-94300 [HIGH] CVE-2026-94300 dhcp: bind: Arbitrary code execution via GSS-TSIG UDP message replay [fedora-all]
CVE-2026-94300 dhcp: bind: Arbitrary code execution via GSS-TSIG UDP message replay [fedora-all]
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.
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.
Bugzilla
CVE-2026-94300 bind: bind: Arbitrary code execution via GSS-TSIG UDP message replay [fedora-all]
bugzilla·2026-10-21·CVSS 8.1
CVE-2026-94300 [HIGH] CVE-2026-94300 bind: bind: Arbitrary code execution via GSS-TSIG UDP message replay [fedora-all]
CVE-2026-94300 bind: bind: Arbitrary code execution via GSS-TSIG UDP message replay [fedora-all]
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.
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.
Bugzilla
CVE-2026-94300 bind: bind: Arbitrary code execution via GSS-TSIG UDP message replay
bugzilla·2026-10-20·CVSS 8.1
CVE-2026-94300 [HIGH] CVE-2026-94300 bind: bind: Arbitrary code execution via GSS-TSIG UDP message replay
CVE-2026-94300 bind: bind: Arbitrary code execution via GSS-TSIG UDP message replay
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.
2026-10-21
Published