CVE-2026-25804: antrea-io antrea Improper Authentication
Vulnerability summary
CVE-2026-25804 is a critical (CVSS 9.1) Improper Authentication vulnerability in antrea-io antrea. EPSS estimates a 0.65% chance of exploitation in the next 30 days, higher than 50.2% of scored vulnerabilities.
Advisory lineage
Upstream 0 · Downstream 2 · Related 2Timeline
- 06-02-2026PublishedVulnerability first disclosed.
- 09-02-2026Last modifiedVulnerability information updated.
Description
Antrea is a Kubernetes networking solution intended to be Kubernetes native. Prior to versions 2.3.2 and 2.4.3, Antrea's network policy priority assignment system has a uint16 arithmetic overflow bug that causes incorrect OpenFlow priority calculations when handling a large numbers of policies with various priority values. This results in potentially incorrect traffic enforcement. This issue has been patched in versions 2.4.3.
CVSS metrics
4 scores · 3 sources · 2 versions- OSV · GoEcosystem advisory · calculated9.3CriticalCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N/E:UDiffers
- NVDNIST8.0HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N/E:U/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
EPSS trend
Probability
0.65%
Chance of exploitation in the next 30 days
Percentile
50%
Versus all other CVEs
30-day change
+0.19 pp
From 0.46% on 19-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root cause- CWE-287Improper AuthenticationWhen an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.
- CWE-770Allocation of Resources Without Limits or ThrottlingThe product allocates a reusable resource or group of resources on behalf of an actor without imposing any intended restrictions on the size or number of resources that can be allocated.
Affected systems
Antrea-io1 product
- antrea< 2.3.2 | ≥ 2.4.0, < 2.4.3
Antrea.io1 product
- antrea< 2.3.2 | ≥ 2.4.0, < 2.4.3 | All versions (No fix recorded)
Linuxfoundation1 product
- antrea< 2.3.2 | ≥ 2.4.0, < 2.4.3
3 vendors · 3 products
References
7 links- github.com/antrea-io/antrea/security/advisories/GHSA-86x4-wp9f-wrr9X Refsource CONFIRMWEBAdvisoryPatchVendor Advisory
- github.com/antrea-io/antreaPACKAGE