ALPINE-CVE-2026-5950
An unbounded resend loop vulnerability exists in the BIND 9 resolver state machine during bad-server handling, enabling a remote unauthenticated attacker to cause severe resource exhaustion by sending queries that trigger specific retry conditions. This issue affects BIND 9 versions 9.18.36 through 9.18.48, 9.20.8 through 9.20.22, 9.21.7 through 9.21.21, 9.18.36-S1 through 9.18.48-S1, and 9.20.9-S1 through 9.20.22-S1.
ALPINE-CVE-2026-5950
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: osv:ALPINE-CVE-2026-5950
bind
Source reference: /affected/0/package/name
- Affected versions
- Not stated in this record
- Fixed versions
- 9.18.49-r0
Source reference:
/affected/0/ranges - Prerequisites
- Not stated in this record
bind
Source reference: /affected/1/package/name
- Affected versions
- Not stated in this record
- Fixed versions
- 9.18.49-r0
Source reference:
/affected/1/ranges - Prerequisites
- Not stated in this record
bind
Source reference: /affected/2/package/name
- Affected versions
- Not stated in this record
- Fixed versions
- 9.20.23-r0
Source reference:
/affected/2/ranges - Prerequisites
- Not stated in this record
bind
Source reference: /affected/3/package/name
- Affected versions
- Not stated in this record
- Fixed versions
- 9.20.23-r0
Source reference:
/affected/3/ranges - Prerequisites
- Not stated in this record
bind
Source reference: /affected/4/package/name
- Affected versions
- Not stated in this record
- Fixed versions
- 9.20.23-r0
Source reference:
/affected/4/ranges - Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "9.18.36"
},
{
"fixed": "9.18.49-r0"
}
]
}
],
"package": {
"name": "bind",
"purl": "pkg:apk/alpine/bind?arch=source",
"ecosystem": "Alpine:v3.20"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2026-5950.json"
},
"ecosystem_specific": {}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "9.18.36"
},
{
"fixed": "9.18.49-r0"
}
]
}
],
"package": {
"name": "bind",
"purl": "pkg:apk/alpine/bind?arch=source",
"ecosystem": "Alpine:v3.21"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2026-5950.json"
},
"ecosystem_specific": {}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "9.18.36"
},
{
"fixed": "9.20.23-r0"
}
]
}
],
"package": {
"name": "bind",
"purl": "pkg:apk/alpine/bind?arch=source",
"ecosystem": "Alpine:v3.22"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2026-5950.json"
},
"ecosystem_specific": {}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "9.18.36"
},
{
"fixed": "9.20.23-r0"
}
]
}
],
"package": {
"name": "bind",
"purl": "pkg:apk/alpine/bind?arch=source",
"ecosystem": "Alpine:v3.23"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2026-5950.json"
},
"ecosystem_specific": {}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "9.18.36"
},
{
"fixed": "9.20.23-r0"
}
]
}
],
"package": {
"name": "bind",
"purl": "pkg:apk/alpine/bind?arch=source",
"ecosystem": "Alpine:v3.24"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2026-5950.json"
},
"ecosystem_specific": {}
}
]Publisher severity
No explicit severity was provided.
- Event
- #54581 · Revision 1
- Added to Heist Feed
- Publisher date