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Description

Malformed BRID/HHIT records can cause `named` to terminate unexpectedly. This issue affects BIND 9 versions 9.18.40 through 9.18.43, 9.20.13 through 9.20.17, 9.21.12 through 9.21.16, 9.18.40-S1 through 9.18.43-S1, and 9.20.13-S1 through 9.20.17-S1.

PUBLISHED Reserved 2025-12-02 | Published 2026-01-21 | Updated 2026-01-21 | Assigner isc




HIGH: 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Problem types

CWE-617 Reachable Assertion

Product status

Default status
unaffected

9.18.40 (custom)
affected

9.20.13 (custom)
affected

9.21.12 (custom)
affected

9.18.40-S1 (custom)
affected

9.20.13-S1 (custom)
affected

Credits

ISC would like to thank Vlatko Kosturjak from Marlink Cyber for bringing this vulnerability to our attention.

References

www.openwall.com/lists/oss-security/2026/01/21/3

kb.isc.org/docs/cve-2025-13878 (CVE-2025-13878) vendor-advisory

downloads.isc.org/isc/bind9/9.18.44 patch

downloads.isc.org/isc/bind9/9.20.18 patch

downloads.isc.org/isc/bind9/9.21.17 patch

cve.org (CVE-2025-13878)

nvd.nist.gov (CVE-2025-13878)

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