CVE-2026-101302CWE-193CWE-476

CVE-2026-101302

Medium · published October 15, 2026

CVSS v3.1
6.5
EPSS
0%
Percentile
35.2
In the wild
Unconfirmed
What it is

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).

The record
Technical detail
CVSS v3.1
6.5 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00420 · 35.2th percentile
Weaknesses
CWE-193 · Off-by-one Error; CWE-476 · NULL Pointer Dereference
Published
2026-10-15T11:17Z
Affected products (29)
ProductVersionsFixed in
freebsd/freebsdall versions—
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References (1)
EPSS history
Timeline
  • 16 OCT 03:27Z
    EPSS moved — → 0%
    epss
  • 15 OCT 06:53Z
    Remote DoS via receive-side kernel TLS
    cvelistv5
  • 15 OCT 06:53Z
    Remote DoS via receive-side kernel TLS
    cvelistv5