# CVE-2022-2906: Memory leaks in code handling Diffie-Hellman key exchange via TKEY RRs (OpenSSL 3.0.0+ only)

> Attackers can cause memory exhaustion in BIND9 via crafted Diffie-Hellman key exchange requests, leading to service crashes and denial of service.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 21 Sep 2022
- **Updated:** 28 May 2025
- **Also known as:** ALPINE-CVE-2022-2906, DEBIAN-CVE-2022-2906, GHSA-pqxc-54m5-8r8m, UBUNTU-CVE-2022-2906

## What is CVE-2022-2906?

CVE-2022-2906 is a high-severity denial of service vulnerability in Isc Bind, published on 21 Sep 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

An attacker can leverage this flaw to gradually erode available memory to the point where named crashes for lack of resources. Upon restart the attacker would have to begin again, but nevertheless there is the potential to deny service.

Weakness: CWE-401 (Missing Release of Memory after Effective Lifetime)

## Which versions are affected by CVE-2022-2906?

It affects 1 product.


Products: Isc Bind.

## How do I fix CVE-2022-2906?

Apply the vendor's patch.

## Is CVE-2022-2906 being exploited?

There is no known exploitation of CVE-2022-2906 in the wild and no public exploit code.

## Other vulnerabilities in Isc Bind

- [CVE-2008-0122](https://insights.sbomify.com/CVE-2008-0122/): Memory corruption in n/a (critical 10.0)
- [CVE-2001-0010](https://insights.sbomify.com/CVE-2001-0010/): Memory corruption in n/a (critical 10.0)
- [CVE-2001-0011](https://insights.sbomify.com/CVE-2001-0011/): Memory corruption in n/a (critical 10.0)
- [CVE-2001-0013](https://insights.sbomify.com/CVE-2001-0013/): Memory corruption in n/a (critical 10.0)
- [CVE-2000-1029](https://insights.sbomify.com/CVE-2000-1029/): Memory corruption in n/a (critical 10.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2022-2906 and fix it if it is affected.

What it is: CVE-2022-2906 is a high-severity denial of service vulnerability in Isc Bind, published on 21 Sep 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2022-2906 in the wild and no public exploit code.

Affected product: Isc Bind. 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-2022-2906/ (Markdown: https://insights.sbomify.com/CVE-2022-2906/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-2906
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-2906
- OSV: https://osv.dev/vulnerability/CVE-2022-2906

---
From sbomify Insights: https://insights.sbomify.com/CVE-2022-2906/
Summaries are generated and may contain mistakes; the official description above is the record.