Concurrent GSS-TSIG messages corrupt memory
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.
CVE-2026-94300
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-94300
BIND 9
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"vendor": "ISC",
"product": "BIND 9",
"versions": [
{
"status": "affected",
"version": "9.11.0",
"versionType": "custom",
"lessThanOrEqual": "9.18.50"
},
{
"status": "affected",
"version": "9.20.0",
"versionType": "custom",
"lessThanOrEqual": "9.20.29"
},
{
"status": "affected",
"version": "9.21.0",
"versionType": "custom",
"lessThanOrEqual": "9.21.26"
},
{
"status": "affected",
"version": "9.11.3-S1",
"versionType": "custom",
"lessThanOrEqual": "9.18.50-S1"
},
{
"status": "affected",
"version": "9.20.9-S1",
"versionType": "custom",
"lessThanOrEqual": "9.20.29-S1"
}
],
"defaultStatus": "unaffected"
}
]- Related CVEs
- CVE-2026-94300
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #52524 · Revision 1
- Added to Heist Feed
- Publisher date