# CVE-2026-104046: Sssd: sssd: denial of service via incomplete identity provider authentication requests

> A local attacker can cause a Denial of Service in SSSD by exhausting memory through incomplete identity provider authentication requests.

- **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:** 9 Oct 2026
- **Also known as:** DEBIAN-CVE-2026-104046, GHSA-35vq-gvvv-mccw, UBUNTU-CVE-2026-104046

## What is CVE-2026-104046?

CVE-2026-104046 is a medium-severity denial of service vulnerability in Redhat Enterprise Linux, 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 (System Security Services Daemon). When Identity Provider (IdP) authentication is enabled, pre-authentication requests retain state in memory without being cleared or timed out. A local attacker can repeatedly initiate authentication flows without completing them, causing unbounded memory consumption. This memory exhaustion can lead to a Denial of Service (DoS) by degrading or terminating SSSD authentication services.

Weakness: CWE-770 (Allocation of Resources Without Limits or Throttling)

## Which versions are affected by CVE-2026-104046?

It affects 3 products.


Products: Fedoraproject Sssd, Redhat Enterprise Linux, Redhat Openshift Container Platform.

## How do I fix CVE-2026-104046?

No fix has been published for CVE-2026-104046 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-104046 being exploited?

There is no known exploitation of CVE-2026-104046 in the wild and no public exploit code.

## Other vulnerabilities in Redhat Enterprise Linux

- [CVE-2022-4254](https://insights.sbomify.com/CVE-2022-4254/): Other in SSSD (high 8.8)
- [CVE-2012-3462](https://insights.sbomify.com/CVE-2012-3462/): Auth bypass in sssd (high 8.8)
- [CVE-2026-104048](https://insights.sbomify.com/CVE-2026-104048/): Sssd: sssd: authorization bypass via cross-domain username collision in hbac evaluation (medium 6.8)
- [CVE-2015-5292](https://insights.sbomify.com/CVE-2015-5292/): Denial of service in n/a (medium 6.8)
- [CVE-2026-12610](https://insights.sbomify.com/CVE-2026-12610/): Sssd: use-after-free crash in sssd' 'sssd_pam' process (medium 6.4)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-104046 and fix it if it is affected.

What it is: CVE-2026-104046 is a medium-severity denial of service vulnerability in Redhat Enterprise Linux, 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-2026-104046 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-2026-104046/ (Markdown: https://insights.sbomify.com/CVE-2026-104046/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-104046
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-104046
- OSV: https://osv.dev/vulnerability/CVE-2026-104046

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-104046/
Summaries are generated and may contain mistakes; the official description above is the record.