CVE-2026-3591
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)
A stack use-after-return flaw in SIG(0) handling code may enable ACL bypass
A use-after-return vulnerability exists in the `named` server when handling DNS queries signed with SIG(0). Using a specially-crafted DNS request, an attacker may be able to cause an ACL to improperly (mis)match an IP address. In a default-allow ACL (denying only specific IP addresses), this may lead to unauthorized access. Default-deny ACLs should fail-secure. This issue affects BIND 9 versions 9.20.0 through 9.20.20, 9.21.0 through 9.21.19, and 9.20.9-S1 through 9.20.20-S1. BIND 9 versions 9.18.0 through 9.18.46 and 9.18.11-S1 through 9.18.46-S1 are NOT affected.
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) |
|---|---|---|---|---|---|
| 9.20.0 | affected | custom | Unavailable | 9.20.20 | None listed |
| 9.21.0 | affected | custom | Unavailable | 9.21.19 | None listed |
| 9.20.9-S1 | affected | custom | Unavailable | 9.20.20-S1 | None listed |
| 9.18.0 | unaffected | custom | Unavailable | 9.18.46 | None listed |
| 9.18.11-S1 | unaffected | custom | Unavailable | 9.18.46-S1 | None listed |