What is CVE-2021-29630?

CVE-2021-29630 is a high-severity vulnerability in FreeBSD, classified under Out-of-bounds Write. CVSS score: 8.1/10. Published 2021-08-30.

How severe is CVE-2021-29630?

High severity. CVSS v3 base score is 8.1 out of 10.

Buffer overflow in FreeBSD

CVE-2021-29630

In FreeBSD 13.0-STABLE before n246938-0729ba2f49c9, 12.2-STABLE before r370383, 11.4-STABLE before r370381, 13.0-RELEASE before p4, 12.2-RELEASE before p10, and 11.4-RELEASE before p13, the ggatec daemon does not validate the size of a response before writing it to a fixed-sized buffer allowing a malicious attacker in a privileged network position to overwrite the stack of ggatec and potentially execute arbitrary code.

Vulnerability class: Buffer Overflow

Published 2021-08-30 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.016 (74.5th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 75th percentile — 74.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.016 · newest: 0.016 · change: 0.000

Affected products

FreeBSD — versions 11.4, 12.2, 13.0
FreeBSD — versions FreeBSD 13.0-RELEASE before p4, 12.2-RELEASE before p10, 11.4-RELEASE before p13

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

security.FreeBSD.org/advisories/FreeBSD-SA-21:14.ggatec.asc (Patch, Vendor Advisory)
security.netapp.com/advisory/ntap-20210923-0005/ (Third Party Advisory)

Frequently asked questions

What is CVE-2021-29630?: CVE-2021-29630 is a high-severity vulnerability in FreeBSD, classified under Out-of-bounds Write. CVSS score: 8.1/10. Published 2021-08-30.
How severe is CVE-2021-29630?: High severity. CVSS v3 base score is 8.1 out of 10.