What’s Vulnerable › Vulnerabilities

CVE-2025-25199: BCryptGenerateSymmetricKey memory leak

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-02-12 · updated 2026-06-17
• Weakness: CWE-401

Description

go-crypto-winnative Go crypto backend for Windows using Cryptography API: Next Generation (CNG). Prior to commit f49c8e1379ea4b147d5bff1b3be5b0ff45792e41, calls to `cng.TLS1PRF` don't release the key handle, producing a small memory leak every time. Commit f49c8e1379ea4b147d5bff1b3be5b0ff45792e41 contains a fix for the issue. The fix is included in versions 1.23.6-2 and 1.22.12-2 of the Microsoft build of go, as well as in the pseudoversion 0.0.0-20250211154640-f49c8e1379ea of the `github.com/microsoft/go-crypto-winnative` Go package.

Affected products

• microsoft go-crypto-winnative: before 1.23.6-2; before 1.22.12-2; before 0.0.0-20250211154640-f49c8e1379ea

References

• https://github.com/microsoft/go-crypto-winnative/commit/f49c8e1379ea4b147d5bff1b3be5b0ff45792e41
• https://github.com/microsoft/go-crypto-winnative/security/advisories/GHSA-29c6-3hcj-89cf

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