CVE-2026-5950
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2026
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
Unbounded resend loop in BIND 9 resolver
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.
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
BIND 9
- Vendor
- ISC
- Product
- BIND 9
- Platforms
- Unknown
- Default status
unaffected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 9.18.36 | affected | custom | Unavailable | 9.18.48 | None listed |
| 9.20.8 | affected | custom | Unavailable | 9.20.22 | None listed |
| 9.21.7 | affected | custom | Unavailable | 9.21.21 | None listed |
| 9.18.36-S1 | affected | custom | Unavailable | 9.18.48-S1 | None listed |
| 9.20.9-S1 | affected | custom | Unavailable | 9.20.22-S1 | None listed |