6.5

CVE-2026-101302: freebsd Off-by-one Error

CVSS: 6.5v3.1MediumAnalyzed
Published 15-10-2026Last modified 15-10-2026
Open JSON

Vulnerability summary

CVE-2026-101302 is a medium (CVSS 6.5) Off-by-one Error vulnerability in freebsd. EPSS estimates a 0.42% chance of exploitation in the next 30 days, higher than 34.9% of scored vulnerabilities.

Overall risk
26/100
0100
Medium · default modelHow is this calculated?
CVSS score
6.5/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.42%
0%100%
Low · Change unavailable
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 15-10-2026
    PublishedVulnerability first disclosed.
  2. 15-10-2026
    Last modifiedVulnerability information updated.

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).

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.42%

Chance of exploitation in the next 30 days

Percentile

35%

Versus all other CVEs

30-day change

Change unavailable

Change unavailable

15-10-202620-10-2026
EPSS score
0.42%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Freebsd1 product
  • freebsdEOL≥ 15.1-RELEASE, < p4 | ≥ 15.0-RELEASE, < p14 | ≥ 14.5-RELEASE, < p1 | ≥ 14.4-RELEASE, < p10 | 14.4 | 14.4:p1 | 14.4:p2 | 14.4:p3 | 14.4:p4 | 14.4:p5 | 14.4:p6 | 14.4:p7 | 14.4:p8 | 14.4:p9 | 14.5 | 15.0 | 15.0:p1 | 15.0:p10 | 15.0:p11 | 15.0:p12 | 15.0:p13 | 15.0:p2 | 15.0:p3 | 15.0:p4 | 15.0:p5 | 15.0:p6 | 15.0:p7 | 15.0:p8 | 15.0:p9 | 15.1 | 15.1:p1 | 15.1:p2 | 15.1:p3

1 vendor · 1 product

References

1 links