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CVE-2023-22839

24
FAUCET Score

CVE-2023-22839 is a high-severity denial-of-service vulnerability affecting F5 BIG-IP versions 17.0.x, 16.1.x, 15.1.x, 14.1.x, and all 13.1.x versions. When a DNS profile with Rapid Response Mode is enabled on a virtual server with hardware SYN cookies, undisclosed requests can cause the Traffic Management Microkernel (TMM) to terminate. This unauthenticated network attack has low complexity and can lead to a complete loss of availability (CVSS 7.5). There is currently no known active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
>= 13.1.0, <= 13.1.5CPE matchmatch criteria
cpe:2.3:a:f5:big-ip_domain_name_system:*:*:*:*:*:*:*:*
>= 14.1.0, < 14.1.5.3CPE matchmatch criteria
cpe:2.3:a:f5:big-ip_domain_name_system:*:*:*:*:*:*:*:*
>= 15.1.0, < 15.1.7CPE matchmatch criteria
cpe:2.3:a:f5:big-ip_domain_name_system:*:*:*:*:*:*:*:*
>= 16.1.0, < 16.1.3.3CPE matchmatch criteria
cpe:2.3:a:f5:big-ip_domain_name_system:*:*:*:*:*:*:*:*
>= 17.0.0, < 17.0.0.2CPE matchmatch criteria
cpe:2.3:a:f5:big-ip_domain_name_system:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.63%
Probability of exploitation in next 30 days
EPSS Percentile
46.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0063 is in the 23rd percentile among its peer group of 51,506 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

my.f5.com / manage/s/article/K37708118
Vendor Advisory