High 7.5Published Jun 21, 2023

CVE-2023-2911If the `recursive-clients` quota is reached on a BIND 9 resolver configured with both `stale-answer-enable yes;` and `stale-answer-client-timeout 0;`, a sequence of serve-stale-related lookups could…

Updated under an hour ago (Oct 27, 2026, 4:10 AM ET)

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Exploited in the last 30 days

If the `recursive-clients` quota is reached on a BIND 9 resolver configured with both `stale-answer-enable yes;` and `stale-answer-client-timeout 0;`, a sequence of serve-stale-related lookups could cause `named` to loop and terminate unexpectedly due to a stack overflow. This issue affects BIND 9 versions 9.16.33 through 9.16.41, 9.18.7 through 9.18.15, 9.16.33-S1 through 9.16.41-S1, and 9.18.11-S1 through 9.18.15-S1.

CVSS: 7.5 HIGH (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): CWE-787
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Not given
NVD analysis: Modified
Record last updated: Oct 24, 2026
First seen by InfoSec Signals: Oct 24, 2026

Affected products

Affected products

isc bind isc:bind	from 9.16.33 through 9.16.41; from 9.16.33 through 9.16.41; from 9.18.7 through 9.18.15; from 9.18.11 through 9.18.15	NVD
debian debian_linux debian:debian_linux	11.0; 12.0; 11.0; 12.0	NVD
fedoraproject fedora fedoraproject:fedora	37; 38	NVD
netapp active_iq_unified_manager netapp:active_iq_unified_manager	all versions	NVD
netapp h700s_firmware netapp:h700s_firmware	all versions	NVD
netapp h300s_firmware netapp:h300s_firmware	all versions	NVD
netapp h410c_firmware netapp:h410c_firmware	all versions	NVD
netapp h410s_firmware netapp:h410s_firmware	all versions	NVD
netapp h500s_firmware netapp:h500s_firmware	all versions	NVD

References

References

http://www.openwall.com/lists/oss-security/2023/06/21/6	mailing-list, patch, third-party-advisory
https://kb.isc.org/docs/cve-2023-2911	vendor-advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/SEFCEVCTYEMKTWA7V7EYPI5YQQ4JWDLI/	mailing-list, third-party-advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/U3K6AJK7RRSR53HRF5GGKPA6PDUDWOD2/	mailing-list, third-party-advisory
https://security.netapp.com/advisory/ntap-20230703-0010/	third-party-advisory
https://www.debian.org/security/2023/dsa-5439	third-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.