Vulnerability details
CVE-2026-58085
FreeBSD FreeBSD
Missing MAC validation in wg(4) packet decryption
CVSS 3.1
7.5High
Official description
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.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 7.5High | 3.1 | CISA ADP / Vulnrichment (CISA-ADP) | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| FreeBSD | FreeBSD | 14.4-RELEASE ≤ v < p8 | CVEProject cvelistV5 (CNA) |
| FreeBSD | FreeBSD | 15.0-RELEASE ≤ v < p12 | CVEProject cvelistV5 (CNA) |
| FreeBSD | FreeBSD | 15.1-RELEASE ≤ v < p2 | CVEProject cvelistV5 (CNA) |
References and advisories
1
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Details
- Published
- 2026-08-19
- Last updated
- 2026-08-27
- State
- Published
- Assigner (CNA)
- freebsd
Exploit prediction (EPSS)
0.32%
Probability of exploitation in 30 days
25.4%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- Yes
- Exploitation
- None
- Technical impact
- Partial
Weaknesses (CWE)
- CWE-347Improper Verification of Cryptographic Signature