CVE-2026-58085 (Medium) detected in freebsd-srcrelease/13.5.0-p11

[mend-bolt-for-github]

CVE-2026-58085 - Medium Severity Vulnerability

Vulnerable Library - freebsd-srcrelease/13.5.0-p11

The FreeBSD src tree publish-only repository. Experimenting with 'simple' pull requests....

Library home page: https://github.com/freebsd/freebsd-src.git

Found in base branches: stable/4.0, master

Vulnerable Source Files (1)

/sys/dev/wg/wg_crypto.c

Vulnerability Details

After dispatching a decrypt operation to OCF and receiving the result, the wg(4) driver failed to check whether the MAC verification step succeeded. The driver thus silently accepted packets with an invalid Poly1305 authentication tag.
A remote attacker who can send UDP packets to a WireGuard endpoint, and who can guess the bounds of the receiver's replay window, can inject forged or modified transport data packets into the tunnel.
A remote attacker who can intercept WireGuard packets bound for a FreeBSD host can modify the ciphertext and authenticated data without detection by the receiver.

Publish Date: 2026-08-19

URL: CVE-2026-58085

CVSS 3 Score Details (5.9)

Base Score Metrics:

• Exploitability Metrics:
  • Attack Vector: Network
  • Attack Complexity: High
  • Privileges Required: None
  • User Interaction: None
  • Scope: Unchanged
• Impact Metrics:
  • Confidentiality Impact: None
  • Integrity Impact: High
  • Availability Impact: None

For more information on CVSS3 Scores, click here.

Suggested Fix

Type: Upgrade version

Release Date: 2026-08-19

Fix Resolution: https://github.com/freebsd/freebsd-src.git - release/15.0.0-p12,https://github.com/freebsd/freebsd-src.git - release/14.4.0-p8,https://github.com/freebsd/freebsd-src.git - release/15.1.0-p2

---

Step up your Open Source Security Game with Mend here