All vulnerabilities
CVE-2026-101302

FreeBSD: Remote DoS via receive-side kernel TLS

FreeBSD FreeBSDOperating systems
Open in ThreatlineRecord JSON
CVSS
6.5Medium
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.42%Chance of exploitation activity in the next 30 days, higher than 35% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed inNone listedNo source names a fixed version. Check the vendor advisory below
Published15 Oct 2026Updated 15 Oct 2026CVE List

What fixes it

No source in this snapshot names a fixed version. The vendor advisories under References are the place to check.

Description

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).

Text from CVE List

Affected versions 4

  • FreeBSDaffected: 15.1-RELEASE before p4CVE List
  • FreeBSDaffected: 15.0-RELEASE before p14CVE List
  • FreeBSDaffected: 14.5-RELEASE before p1CVE List
  • FreeBSDaffected: 14.4-RELEASE before p10CVE List

References 1