# DEBIAN-CVE-2025-7394: wolfssl security update

DEBIAN-CVE-2025-7394, released July 18, 2025, fixes 1 CVE in wolfssl. None of them is reported as exploited. Patch Radar priority: Urgent.

- Web page: https://patchblox.com/security/fix/linux/debian-cve-2025-7394
- Platform: Linux
- Released: Jul 18, 2025
- Priority: Urgent (Closes CVE-2025-7394, rated Critical)
- CVEs: 1, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://security-tracker.debian.org/tracker/CVE-2025-7394

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [wolfssl](https://patchblox.com/security/data/product/linux/wolfssl.md) | Debian 12.15 (bookworm) | 5.5.4-2+deb12u2 |
| [wolfssl](https://patchblox.com/security/data/product/linux/wolfssl.md) | Debian 13.5 (trixie) | 5.7.2-0.1+deb13u1 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2025-7394](https://patchblox.com/security/data/cve/CVE-2025-7394.md) | Urgent | In the OpenSSL compatibility layer implementation, the function RAND_poll() was not behaving as expected and leading to the potential for predictable values returned from RAND_bytes() after fork() is called. This can lead to weak or predictable random numbers generated in applications that are both using RAND_bytes() and doing fork() operations. This only affects applications explicitly calling RAND_bytes() after fork() and does not affect any internal TLS operations. Although RAND_bytes() documentation in OpenSSL calls out not being safe for use with fork() without first calling RAND_poll(), an additional code change was also made in wolfSSL to make RAND_bytes() behave similar to OpenSSL after a fork() call without calling RAND_poll(). Now the Hash-DRBG used gets reseeded after detecting running in a new process. If making use of RAND_bytes() and calling fork() we recommend updating to the latest version of wolfSSL. Thanks to Per Allansson from Appgate for the report. | 9.8 | 0.0046 |  |

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