NULL pointer dereference in FreeBSD
CVE-2026-101302
TLS 1.3 embeds the actual record type as the last non-zero byte of the decrypted payload, optionally followed by zero padding. The code which searches for the inner record type had an off-by-one bug which could be triggered by an invalid frame, leading to an underflow followed by an unconditional NULL pointer dereference, causing a kernel panic. A remote TLS 1.3 peer can send a specially crafted record to trigger a kernel panic, resulting in a Denial of Service (DoS).
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- security.freebsd.org/advisories/FreeBSD-SA-26:67.ktls.asc (vendor-advisory)
Frequently asked questions
- What is CVE-2026-101302?
- CVE-2026-101302 is a medium-severity vulnerability in FreeBSD, classified under Off-by-one Error. CVSS score: 6.5/10. Published 2026-10-15.
- How severe is CVE-2026-101302?
- Medium severity. CVSS v3 base score is 6.5 out of 10.