HTTP/2 Vulnerability
Published Aug 13, 2025
6.9
MEDIUMCVSS 4.0
EPSS 0.50%
Description
An HTTP/2 implementation flaw allows a denial-of-service (DoS) that uses malformed HTTP/2 control frames in order to break the max concurrent streams limit (HTTP/2 MadeYouReset Attack).
Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
Affected products
-
- Version 15.1.0StatusaffectedConstraints<*
- Version 16.1.0StatusaffectedConstraints<*
- Version 17.1.0StatusaffectedConstraints<*
- Version 17.5.0StatusaffectedConstraints<*
- Version
-
- Version 20.3.0StatusaffectedConstraints<*
- Version
-
- Version 1.1.0StatusaffectedConstraints<*
- Version 2.0.0StatusaffectedConstraints<*
- Version
-
- Version 1.7.0StatusaffectedConstraints<*
- Version 2.0.0StatusaffectedConstraints<*
- Version
-
- Version 2.0.0StatusaffectedConstraints<*
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| F5 | Big-IP | n/a |
| |||||||||||||||
| F5 | BIG-IP Next | n/a |
| |||||||||||||||
| F5 | BIG-IP Next CNF | n/a |
| |||||||||||||||
| F5 | BIG-IP Next SPK | n/a |
| |||||||||||||||
| F5 | BIG-IP Next for Kubernetes | n/a |
|
Configuration 1
- ≥ 15.1.0 · < 15.1.10.8
- ≥ 15.1.0 · < 15.1.10.8
- ≥ 15.1.0 · < 15.1.10.8
- ≥ 15.1.0 · < 15.1.10.8
- ≥ 15.1.0 · < 15.1.10.8
- ≥ 15.1.0 · < 15.1.10.8
- ≥ 15.1.0 · < 15.1.10.8
- ≥ 15.1.0 · < 15.1.10.8
- ≥ 15.1.0 · < 15.1.10.8
- ≥ 15.1.0 · < 15.1.10.8
- ≥ 15.1.0 · < 15.1.10.8
- ≥ 15.1.0 · < 15.1.10.8
- ≥ 15.1.0 · < 15.1.10.8
- ≥ 15.1.0 · < 15.1.10.8
- ≥ 15.1.0 · < 15.1.10.8
- ≥ 15.1.0 · < 15.1.1.0.8
- ≥ 15.1.0 · < 15.1.10.8
- ≥ 15.1.0 · < 15.1.10.8
- ≥ 15.1.0 · < 15.1.10.8
- ≥ 15.1.0 · < 15.1.10.8
- ≥ 15.1.0 · < 15.1.10.8
Configuration 2
- ≥ 16.1.0 · < 16.1.6.1
- ≥ 16.1.0 · < 16.1.6.1
- ≥ 16.1.0 · < 16.1.6.1
- ≥ 16.1.0 · < 16.1.6.1
- ≥ 16.1.0 · < 16.1.6.1
- ≥ 16.1.0 · < 16.1.6.1
- ≥ 16.1.0 · < 16.1.6.1
- ≥ 16.1.0 · < 16.1.6.1
- ≥ 16.1.0 · < 16.1.6.1
- ≥ 16.1.0 · < 16.1.6.1
- ≥ 16.1.0 · < 16.1.6.1
- ≥ 16.1.0 · < 16.1.6.1
- ≥ 16.1.0 · < 16.1.6.1
- ≥ 16.1.0 · < 16.1.6.1
- ≥ 16.1.0 · < 16.1.6.1
- ≥ 16.1.0 · < 16.1.6.1
- ≥ 16.1.0 · < 16.1.6.1
- ≥ 16.1.0 · < 16.1.6.1
- ≥ 16.1.0 · < 16.1.6.1
- ≥ 16.1.0 · < 16.1.6.1
- ≥ 16.1.0 · < 16.1.6.1
Configuration 3
- ≥ 17.1.0 · < 17.1.3
- ≥ 17.5.0 · < 17.5.1.2
- ≥ 17.1.0 · < 17.1.3
- ≥ 17.5.0 · < 17.5.1.2
- ≥ 17.1.0 · < 17.1.3
- ≥ 17.5.0 · < 17.5.1.2
- ≥ 17.1.0 · < 17.1.3
- ≥ 17.5.0 · < 17.5.1.2
- ≥ 17.1.0 · < 17.1.3
- ≥ 17.5.0 · < 17.5.1.2
- ≥ 17.1.0 · < 17.1.3
- ≥ 17.5.0 · < 17.5.1.2
- ≥ 17.1.0 · < 17.1.3
- ≥ 17.5.0 · < 17.5.1.2
- ≥ 17.1.0 · < 17.1.3
- ≥ 17.5.0 · < 17.5.1.2
- ≥ 17.1.0 · < 17.1.3
- ≥ 17.5.0 · < 17.5.1.2
- ≥ 17.1.0 · < 17.1.3
- ≥ 17.5.0 · < 17.5.1.2
- ≥ 17.1.0 · < 17.1.3
- ≥ 17.5.0 · < 17.5.1.2
- ≥ 17.1.0 · < 17.1.3
- ≥ 17.5.0 · < 17.5.1.2
- ≥ 17.1.0 · < 17.1.3
- ≥ 17.5.0 · < 17.5.1.2
- ≥ 17.1.0 · < 17.1.3
- ≥ 17.5.0 · < 17.5.1.2
- ≥ 17.1.0 · < 17.1.3
- ≥ 17.1.0 · < 17.1.3
- ≥ 17.5.0 · < 17.5.1.2
- ≥ 17.1.0 · < 17.1.3
- ≥ 17.5.0 · < 17.5.1.2
- ≥ 17.1.0 · < 17.1.3
- ≥ 17.5.0 · < 17.5.1.2
- ≥ 17.1.0 · < 17.1.3
- ≥ 17.5.0 · < 17.5.1.2
- ≥ 17.1.0 · < 17.1.3
- ≥ 17.5.0 · < 17.5.1.2
- ≥ 17.1.0 · < 17.1.3
- ≥ 17.5.0 · < 17.5.1.2
Configuration 4
- 20.3.0
- ≥ 1.1.0 · ≤ 1.4.1
- ≥ 2.0.0 · ≤ 2.0.2
- 2.0.0
- ≥ 1.7.0 · ≤ 1.9.2
- ≥ 2.0.0 · ≤ 2.0.2
- n/a
No data.
Red Hat Enterprise Linux 10
nginx
Not affected
Red Hat Enterprise Linux 8
nginx:1.22/nginx
Not affected
Red Hat Enterprise Linux 8
nginx:1.24/nginx
Not affected
Red Hat Enterprise Linux 9
nginx
Not affected
Red Hat Enterprise Linux 9
nginx:1.22/nginx
Not affected
Red Hat Enterprise Linux 9
nginx:1.24/nginx
Not affected
Red Hat Enterprise Linux 9
nginx:1.26/nginx
Not affected
Red Hat Hardened Images
nginx
Not affected
Red Hat Lightspeed proxy 1
insights-proxy/insights-proxy-container-rhel9
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 10 | nginx | Not affected | n/a |
| Red Hat Enterprise Linux 8 | nginx:1.22/nginx | Not affected | n/a |
| Red Hat Enterprise Linux 8 | nginx:1.24/nginx | Not affected | n/a |
| Red Hat Enterprise Linux 9 | nginx | Not affected | n/a |
| Red Hat Enterprise Linux 9 | nginx:1.22/nginx | Not affected | n/a |
| Red Hat Enterprise Linux 9 | nginx:1.24/nginx | Not affected | n/a |
| Red Hat Enterprise Linux 9 | nginx:1.26/nginx | Not affected | n/a |
| Red Hat Hardened Images | nginx | Not affected | n/a |
| Red Hat Lightspeed proxy 1 | insights-proxy/insights-proxy-container-rhel9 | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
No versions of NGINX used in Red Hat products or services are vulnerable.
Metrics
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
1 other source (NVD) ▾
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
1 other source (Red Hat) ▾
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
No CVSS v3.0 score for this CVE.
No CVSS v2.0 score for this CVE.
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
NoneAutomatable
YesTechnical Impact
PartialDecision
n/aAssessed Aug 13, 2025 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2025–2026- EPSS v4
- EPSS v5
Percentile over time
- EPSS v4
- EPSS v5
Table of values (3 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.50% (0.00498) | 40.42th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.46% (0.00458) | 36.05th | v5 (v2026.06.15) |
| Aug 14, 2025 | 0.07% (0.00070) | 21.74th | v4 (v2025.03.14) |
References (7)
- https://access.redhat.com/security/cve/CVE-2025-54500 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2388251 Issue Tracking
- https://kb.cert.org/vuls/id/767506
- https://my.f5.com/manage/s/article/K000152001 vendor-advisoryVendor Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2025-54500
- https://www.cve.org/CVERecord?id=CVE-2025-54500
- https://www.kb.cert.org/vuls/id/767506 Third Party Advisory
| Link | Providers | Tags |
|---|---|---|
| https://access.redhat.com/security/cve/CVE-2025-54500 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=2388251 | Issue Tracking | |
| https://kb.cert.org/vuls/id/767506 | ||
| https://my.f5.com/manage/s/article/K000152001 | vendor-advisoryVendor Advisory | |
| https://nvd.nist.gov/vuln/detail/CVE-2025-54500 | ||
| https://www.cve.org/CVERecord?id=CVE-2025-54500 | ||
| https://www.kb.cert.org/vuls/id/767506 | Third Party Advisory |
Change history (0)
No recorded changes yet.