# CVE-2026-101302: Remote DoS via receive-side kernel TLS


- **Severity:** Medium 6.5 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Fix available:** No
- **Published:** 15 Oct 2026
- **Updated:** 15 Oct 2026

## What is CVE-2026-101302?

CVE-2026-101302 is a medium-severity vulnerability in Freebsd Freebsd, published on 15 Oct 2026. 

### Official 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).

Weakness: CWE-476 (NULL Pointer Dereference), CWE-193 (Off-by-one Error)

## Which versions are affected by CVE-2026-101302?

It affects 1 product.


Products: Freebsd Freebsd.

## How do I fix CVE-2026-101302?

No fix has been published for CVE-2026-101302 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-101302 being exploited?

There is no known exploitation of CVE-2026-101302 in the wild and no public exploit code.

## Other vulnerabilities in Freebsd Freebsd

- [CVE-2018-17160](https://insights.sbomify.com/CVE-2018-17160/): Memory corruption in FreeBSD (critical 10.0)
- [CVE-2014-3954](https://insights.sbomify.com/CVE-2014-3954/): Memory corruption in n/a (critical 10.0)
- [CVE-2006-4304](https://insights.sbomify.com/CVE-2006-4304/): Memory corruption in n/a (critical 10.0)
- [CVE-2006-0226](https://insights.sbomify.com/CVE-2006-0226/): Integer overflow in n/a (critical 10.0)
- [CVE-2004-0002](https://insights.sbomify.com/CVE-2004-0002/): Denial of service in n/a (critical 10.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-101302 and fix it if it is affected.

What it is: CVE-2026-101302 is a medium-severity vulnerability in Freebsd Freebsd, published on 15 Oct 2026. 
Exploitation: There is no known exploitation of CVE-2026-101302 in the wild and no public exploit code.

Affected product: Freebsd Freebsd. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-101302/ (Markdown: https://insights.sbomify.com/CVE-2026-101302/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-101302
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-101302
- OSV: https://osv.dev/vulnerability/CVE-2026-101302

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-101302/
Summaries are generated and may contain mistakes; the official description above is the record.