# CVE-2026-12610: Sssd: use-after-free crash in sssd' 'sssd_pam' process > A local attacker can crash the SSSD PAM responder or potentially escalate privileges by manipulating smartcard or YubiKey data. - **Severity:** Medium 6.4 (`CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H`) - **Exploited in the wild:** Not known - **Login needed:** An administrator - **Attackable:** Local or same network only - **Victim action needed:** Not needed - **Fix available:** Yes - **Published:** 30 Jun 2026 - **Updated:** 31 Aug 2026 - **Also known as:** CLSA-2026-1787127601, CLSA-2026-1787894517, DEBIAN-CVE-2026-12610, GHSA-f953-7679-xc38, OESA-2026-3018, OESA-2026-3022, SUSE-SU-2026:22999-1, SUSE-SU-2026:23061-1, SUSE-SU-2026:23110-1, SUSE-SU-2026:23132-1, SUSE-SU-2026:23171-1, SUSE-SU-2026:3368-1, SUSE-SU-2026:3394-1, SUSE-SU-2026:3401-1, UBUNTU-CVE-2026-12610, USN-8672-1, openSUSE-SU-2026:21507-1 ## What is CVE-2026-12610? CVE-2026-12610 is a medium-severity use after free vulnerability in Redhat Enterprise Linux, published on 30 Jun 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. When authenticating with a YubiKey, the SSSD PAM responder can crash due to a use-after-free vulnerability, where a memory pointer is incorrectly handled. A local attacker could exploit this flaw by manipulating smartcard or YubiKey contents, leading to a denial of service that disrupts authentication. This vulnerability also presents a potential for privilege escalation, although it is difficult to exploit. Weakness: CWE-825 (Expired Pointer Dereference) ## Which versions are affected by CVE-2026-12610? It affects 2 products. | Package | Ecosystem | Affected | Fixed in | | --- | --- | --- | --- | | `sssd` | SUSE:Linux Enterprise Micro 5.3 | All versions | 2.5.2-150400.4.48.1 | | `sssd` | SUSE:Linux Enterprise Micro 5.4 | All versions | 2.5.2-150400.4.48.1 | | `sssd` | SUSE:Linux Enterprise Module for Basesystem 15 SP7 | All versions | 2.10.2-150700.9.37.1 | | `sssd` | SUSE:Linux Enterprise Server 16.0 | All versions | 2.10.2-160000.4.1 | | `sssd` | SUSE:Linux Enterprise Server 16.0 | All versions | 2.10.2-160000.4.1 | | `sssd` | SUSE:Linux Enterprise Server LTSS Extended Security 12 SP5 | All versions | 1.16.1-7.76.1 | | `sssd` | SUSE:Linux Enterprise Server for SAP applications 16.0 | All versions | 2.10.2-160000.4.1 | | `sssd` | SUSE:Linux Enterprise Server for SAP applications 16.0 | All versions | 2.10.2-160000.4.1 | | `sssd` | SUSE:Linux Micro 6.0 | All versions | 2.8.2-9.1 | | `sssd` | SUSE:Linux Micro 6.1 | All versions | 2.9.5-slfo.1.1_6.1 | | `sssd` | SUSE:Linux Micro 6.2 | All versions | 2.10.2-160000.4.1 | | `sssd` | openSUSE:Leap 16.0 | All versions | 2.10.2-160000.4.1 | Products: Fedoraproject Sssd, Redhat Enterprise Linux. ## How do I fix CVE-2026-12610? Apply the vendor's patch. ## Is CVE-2026-12610 being exploited? There is no known exploitation of CVE-2026-12610 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-2026-104046](https://insights.sbomify.com/CVE-2026-104046/): Sssd: sssd: denial of service via incomplete identity provider authentication requests (medium 6.2) ## Fix prompt for AI coding agents ```text Check this codebase for CVE-2026-12610 and fix it if it is affected. What it is: CVE-2026-12610 is a medium-severity use after free vulnerability in Redhat Enterprise Linux, published on 30 Jun 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-2026-12610 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-2026-12610/ (Markdown: https://insights.sbomify.com/CVE-2026-12610/index.md) ``` ## Sources - CVE record: https://www.cve.org/CVERecord?id=CVE-2026-12610 - NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-12610 - OSV: https://osv.dev/vulnerability/CVE-2026-12610 --- From sbomify Insights: https://insights.sbomify.com/CVE-2026-12610/ Summaries are generated and may contain mistakes; the official description above is the record.