CVE-2023-2911: Debian Linux

High severity, CVSS 7.5. EPSS: 2.5% chance of exploitation in the next 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.

Affected products

• Debian Debian Linux: version 11.0 only; version 12.0 only
• Fedoraproject Fedora: version 37 only; version 38 only
• ISC BIND: from 9.16.33, up to and including 9.16.41; from 9.18.7, up to and including 9.18.15; from 9.18.11, up to and including 9.18.15
• Netapp Active Iq Unified Manager: affected versions not specified
• Netapp h300s Firmware: affected versions not specified
• Netapp h410c Firmware: affected versions not specified
• Netapp h410s Firmware: affected versions not specified
• Netapp h500s Firmware: affected versions not specified
• Netapp h700s Firmware: affected versions not specified

Published 2023-06-21. Last modified 2026-06-17.