# CVE-2026-58224: Samba: ctdb fails to do integrity checking of received packets

> Remote attackers on the CTDB network can cause denial of service or memory disclosure via malformed packets due to insufficient integrity checks.

- **Severity:** Medium 6.5 (`CVSS:3.1/AV:A/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:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 14 Aug 2026
- **Updated:** 21 Oct 2026
- **Also known as:** AZL-95888, CLSA-2026-1787133276, CLSA-2026-1788267403, CLSA-2026-1788338370, CLSA-2026-1788338379, CLSA-2026-1789553469, DEBIAN-CVE-2026-58224, ECHO-57c1-adea-b0bf, GHSA-ph76-744q-p8fh, UBUNTU-CVE-2026-58224

## What is CVE-2026-58224?

CVE-2026-58224 is a medium-severity denial of service vulnerability in Redhat Enterprise Linux, published on 14 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

A flaw was found in Samba's CTDB, the clustered database service used by Samba. Insufficient integrity validation of received CTDB protocol packets allows malformed packets containing invalid field lengths, improperly terminated strings, or inconsistent packet sizes to be processed without adequate bounds checking. A remote attacker with access to the CTDB private network may trigger a denial of service through process crashes or excessive memory consumption and, in limited cases, disclose adjacent memory contents.

Weakness: CWE-353 (Missing Support for Integrity Check)

## Which versions are affected by CVE-2026-58224?

It affects 2 products.


Products: Redhat Enterprise Linux, Samba Samba.

## How do I fix CVE-2026-58224?

Apply the vendor's patch.

## Is CVE-2026-58224 being exploited?

There is no known exploitation of CVE-2026-58224 in the wild and no public exploit code.

## Other vulnerabilities in Redhat Enterprise Linux

- [CVE-2018-14667](https://insights.sbomify.com/CVE-2018-14667/): Red Hat JBoss RichFaces Framework Expression Language Injection (critical 9.8, exploited in the wild)
- [CVE-2021-20325](https://insights.sbomify.com/CVE-2021-20325/): Missing fixes for CVE-2021-40438 and CVE-2021-26691 in the versions of httpd, as shipped in Red Hat Enterprise Linux 8.5.0, causes a securit (critical 9.8)
- [CVE-2018-25011](https://insights.sbomify.com/CVE-2018-25011/): Memory corruption in libwebp (critical 9.8)
- [CVE-2018-25014](https://insights.sbomify.com/CVE-2018-25014/): Other in libwebp (critical 9.8)
- [CVE-2014-3585](https://insights.sbomify.com/CVE-2014-3585/): Supply chain in redhat-upgrade-tool (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-58224 and fix it if it is affected.

What it is: CVE-2026-58224 is a medium-severity denial of service vulnerability in Redhat Enterprise Linux, published on 14 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-58224 in the wild and no public exploit code.

Affected product: Redhat Enterprise Linux. 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-2026-58224/ (Markdown: https://insights.sbomify.com/CVE-2026-58224/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-58224
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-58224
- OSV: https://osv.dev/vulnerability/CVE-2026-58224

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-58224/
Summaries are generated and may contain mistakes; the official description above is the record.