# CVE-2026-104044: Sssd: sssd: denial of service via crafted passkey kerberos authentication request

> A local attacker can cause a denial of service in SSSD by triggering a null pointer dereference during passkey Kerberos authentication.

- **Severity:** Medium 6.2 (`CVSS:3.1/AV:L/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:** No
- **Published:** 6 Oct 2026
- **Updated:** 8 Oct 2026
- **Also known as:** DEBIAN-CVE-2026-104044, GHSA-8mhg-g2wf-86gg, UBUNTU-CVE-2026-104044

## What is CVE-2026-104044?

CVE-2026-104044 is a medium-severity vulnerability in Red Hat Enterprise Linux 10, published on 6 Oct 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 sssd. A local attacker can trigger a Denial of Service (DoS) by sending a specially crafted Pluggable Authentication Module (PAM) request when passkey authentication is enabled. Due to a missing state validation check in passkey Kerberos handling, the PAM responder dereferences an uninitialized pointer and crashes. This failure disrupts authentication services on the host.

Weakness: CWE-476 (NULL Pointer Dereference)

## Which versions are affected by CVE-2026-104044?


## How do I fix CVE-2026-104044?

No fix has been published for CVE-2026-104044 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-104044 being exploited?

There is no known exploitation of CVE-2026-104044 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-104044 and fix it if it is affected.

What it is: CVE-2026-104044 is a medium-severity vulnerability in Red Hat Enterprise Linux 10, published on 6 Oct 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-2026-104044 in the wild and no public exploit code.

Affected product: Red Hat Enterprise Linux 10. 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-2026-104044/ (Markdown: https://insights.sbomify.com/CVE-2026-104044/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-104044
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-104044
- OSV: https://osv.dev/vulnerability/CVE-2026-104044

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-104044/
Summaries are generated and may contain mistakes; the official description above is the record.