CVE-2026-5947
- Source
- https://cve.org/CVERecord?id=CVE-2026-5947
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-5947.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-5947
- Downstream
ALPINE (1)
AZL (1)
BELL (1)
DEBIAN (1)
ECHO (1)
MGASA (1)
MINI (1)
openSUSE (2)
RHSA (1)
UBUNTU (1)
- Related
- Published
- 2026-05-20T13:16:40Z
- Modified
- 2026-10-20T12:01:58Z
- Severity
-
- 5.9 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
- Summary
- [none]
- Details
-
Undefined behavior may result due to a race condition leading to a use-after-free violation. If BIND receives an incoming DNS message signed with SIG(0), it begins work to validate that signature. If, during that validation, the "recursive-clients" limit is reached (as would occur during a query flood), and that same DNS message is discarded per the limit, there is a brief window of time while the SIG(0) validation may attempt to read the now-discarded DNS message. This issue affects BIND 9 versions 9.20.0 through 9.20.22, 9.21.0 through 9.21.21, and 9.20.9-S1 through 9.20.22-S1. BIND 9 versions 9.18.28 through 9.18.49 and 9.18.28-S1 through 9.18.49-S1 are NOT affected.
- References
-
- https://access.redhat.com/security/cve/CVE-2026-5947
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-5947.json
- https://access.redhat.com/errata/RHSA-2026:7412
- https://kb.isc.org/docs/cve-2026-5947
- https://bugzilla.redhat.com/show_bug.cgi?id=2479772
- https://downloads.isc.org/isc/bind9/9.20.23
- https://downloads.isc.org/isc/bind9/9.21.22
Affected packages
Git / github.com/isc-projects/bind9
Affected ranges
- Type
- GIT
- Repo
- https://github.com/isc-projects/bind9
- Events
- Database specific
-
Show details
{ "extracted_events": [ { "cpe": "cpe:2.3:a:isc:bind:*:*:*:*:-:*:*:*", "range": [ { "introduced": "9.20.0" }, { "fixed": "9.20.23" } ], "source": "CPE_RANGE" }, { "cpe": "cpe:2.3:a:isc:bind:*:*:*:*:-:*:*:*", "range": [ { "introduced": "9.21.0" }, { "fixed": "9.21.22" } ], "source": "CPE_RANGE" } ] }
Git / gitlab.isc.org/isc-projects/bind9
Affected ranges
- Type
- GIT
- Repo
- https://gitlab.isc.org/isc-projects/bind9
- Events
- Database specific
-
Show details
{ "extracted_events": [ { "cpe": "cpe:2.3:a:isc:bind:*:*:*:*:-:*:*:*", "range": [ { "introduced": "9.20.0" }, { "fixed": "9.20.23" } ], "source": "CPE_RANGE" }, { "cpe": "cpe:2.3:a:isc:bind:*:*:*:*:-:*:*:*", "range": [ { "introduced": "9.21.0" }, { "fixed": "9.21.22" } ], "source": "CPE_RANGE" } ] }