CVE-2023-40534 json
BIG-IP HTTP/2 vulnerability
published 2023-10-10 3 y ago modified 2026-06-17 4 mo ago also EUVD-2023-45105
- cvss
- 7.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.7%
- EPSS 0.7% chance of exploitation in 30 days, percentile 51%
- public exploits
- 0
- none known
Summary
When a client-side HTTP/2 profile and the HTTP MRF Router option are enabled for a virtual server, and an iRule using the HTTP_REQUEST event or Local Traffic Policy are associated with the virtual server, undisclosed requests can cause TMM to terminate. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
Patch / fix
- F5 BIG-IP 13.1.0, 14.1.0, 15.1.0, 16.1.4.1.0.13.5-ENG, 17.1.0.3.0.23.4-ENG
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 2 y ago
Exploit prediction
0.65% chance of exploitation in the next 30 days, higher than 51% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
Affected products
- F5 BIG-IP
- F5 BIG-IP Next SPK
Classification
- Weakness
-
- CWE-401 Missing Release of Memory after Effective Lifetime
References
-
my.f5.com
/manage/s/article/K000133467
vendor-advisory
Sources
- CVE List CVE-2023-40534
- NVD CVE-2023-40534
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.