CVE-2023-5680 | Cleaning an ECS-enabled cache may cause excessive CPU load

If a resolver cache has a very large number of ECS records stored for the same name, the process of cleaning the cache database node for this name can significantly impair query performance. This issue affects BIND 9 versions 9.11.3-S1 through 9.11.37-S1, 9.16.8-S1 through 9.16.45-S1, and 9.18.11-S1 through 9.18.21-S1.

Published: 2024-02-13 Last update: 2026-06-17 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2023-5680 is rated Low Risk (37.5/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.62%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2023-5680

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.09% 0.62% +0.53%
2 2025-11-21 0.39% 0.09% -0.30%
3 2025-11-18 — 0.39% —

Full EPSS history (8 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2023-5680

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.3 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:L)
Might cause slowdowns, glitches, or partial disruption—not a full brick.
 3.9 1.4 [email protected]

Weakness enumeration for CVE-2023-5680

OS Trackers for CVE-2023-5680

vendor priority summary link
alpine medium CVE-2023-5680: 1 source package rows (bind); 7 state rows across 7 repos (3.17-main, 3.18-main, 3.19-main, 3.20-main, 3.21-main, 3.22-main, edge-main); fixed 7, open 0. https://security.alpinelinux.org/vuln/CVE-2023-5680
debian unimportant CVE-2023-5680 unimportant priority: Debian including 1 source packages (bind9), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2023-5680
redhat medium — https://access.redhat.com/security/cve/CVE-2023-5680
suse medium CVE-2023-5680 severity moderate: SUSE including 32 source package names (bind, bind-chrootenv, …), 307 product×package rows across 37 product lines (SUSE CaaS Platform 4.0, SUSE Enterprise Storage 7.1, … (37 product lines)): Known Not Affected 307. https://www.suse.com/security/cve/CVE-2023-5680/
ubuntu medium CVE-2023-5680 medium priority: Ubuntu including 2 source packages (bind9, isc-dhcp), 16 status rows across 8 suites (bionic, focal, jammy, mantic, noble, trusty, upstream, xenial): not-affected 14, needs-triage 2. https://ubuntu.com/security/CVE-2023-5680

Affected software / configurations for CVE-2023-5680

Vendor Product Version Raw CPE
isc bind 9.11.3 cpe:2.3:a:isc:bind:9.11.3:s1:*:*:supported_preview:*:*:*
isc bind 9.11.3 cpe:2.3:a:isc:bind:9.11.3:s4:*:*:supported_preview:*:*:*
isc bind 9.11.4 cpe:2.3:a:isc:bind:9.11.4:s1:*:*:supported_preview:*:*:*
isc bind 9.11.5 cpe:2.3:a:isc:bind:9.11.5:s3:*:*:supported_preview:*:*:*
isc bind 9.11.5 cpe:2.3:a:isc:bind:9.11.5:s5:*:*:supported_preview:*:*:*
isc bind 9.11.5 cpe:2.3:a:isc:bind:9.11.5:s6:*:*:supported_preview:*:*:*
isc bind 9.11.6 cpe:2.3:a:isc:bind:9.11.6:s1:*:*:supported_preview:*:*:*
isc bind 9.11.7 cpe:2.3:a:isc:bind:9.11.7:s1:*:*:supported_preview:*:*:*
isc bind 9.11.8 cpe:2.3:a:isc:bind:9.11.8:s1:*:*:supported_preview:*:*:*
isc bind 9.11.12 cpe:2.3:a:isc:bind:9.11.12:s1:*:*:supported_preview:*:*:*
isc bind 9.11.21 cpe:2.3:a:isc:bind:9.11.21:s1:*:*:supported_preview:*:*:*
isc bind 9.11.27 cpe:2.3:a:isc:bind:9.11.27:s1:*:*:supported_preview:*:*:*
isc bind 9.11.29 cpe:2.3:a:isc:bind:9.11.29:s1:*:*:supported_preview:*:*:*
isc bind 9.11.35 cpe:2.3:a:isc:bind:9.11.35:s1:*:*:supported_preview:*:*:*
isc bind 9.11.37 cpe:2.3:a:isc:bind:9.11.37:s1:*:*:supported_preview:*:*:*
isc bind 9.16.8 cpe:2.3:a:isc:bind:9.16.8:s1:*:*:supported_preview:*:*:*
isc bind 9.16.11 cpe:2.3:a:isc:bind:9.16.11:s1:*:*:supported_preview:*:*:*
isc bind 9.16.12 cpe:2.3:a:isc:bind:9.16.12:s1:*:*:supported_preview:*:*:*
isc bind 9.16.13 cpe:2.3:a:isc:bind:9.16.13:s1:*:*:supported_preview:*:*:*
isc bind 9.16.14 cpe:2.3:a:isc:bind:9.16.14:s1:*:*:supported_preview:*:*:*
isc bind 9.16.21 cpe:2.3:a:isc:bind:9.16.21:s1:*:*:supported_preview:*:*:*
isc bind 9.16.32 cpe:2.3:a:isc:bind:9.16.32:s1:*:*:supported_preview:*:*:*
isc bind 9.16.36 cpe:2.3:a:isc:bind:9.16.36:s1:*:*:supported_preview:*:*:*
isc bind 9.16.43 cpe:2.3:a:isc:bind:9.16.43:s1:*:*:supported_preview:*:*:*
isc bind 9.18.11 cpe:2.3:a:isc:bind:9.18.11:s1:*:*:supported_preview:*:*:*
isc bind 9.18.18 cpe:2.3:a:isc:bind:9.18.18:s1:*:*:supported_preview:*:*:*
isc bind 9.18.21 cpe:2.3:a:isc:bind:9.18.21:s1:*:*:supported_preview:*:*:*
netapp active_iq_unified_manager — cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:vmware_vsphere:*:*

References for CVE-2023-5680

cvelogic Threat Intelligence