CVE-2026-90994
Sssd: sssd: denial of service via malformed pam v1 requests
- State
- Published
- Severity
- 4.0 Medium
- Published
- Sep 14, 2026
- Updated
- Oct 16, 2026
- Reserved
- Sep 14, 2026
Description
A flaw was found in sssd, specifically within the PAM (Pluggable Authentication Modules) responder's protocol v1 parser, pam_parse_in_data(). A local client with access to the PAM responder's UNIX socket can exploit this by negotiating protocol v1 and sending an empty or truncated PAM request body. This can trigger an out-of-bounds read, potentially causing the PAM responder to terminate or restart, leading to a local denial of service.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 4.0 Medium | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L | redhat |
Weaknesses
- CWE-125 Out-of-bounds Read
Affected Products
| Product | Versions |
|---|---|
Red Hat Enterprise Linux 10Red Hat | |
Red Hat Enterprise Linux 6Red Hat | |
Red Hat Enterprise Linux 7Red Hat | |
Red Hat Enterprise Linux 8Red Hat | |
Red Hat Enterprise Linux 9Red Hat | |
Red Hat OpenShift Container Platform 4Red Hat | |
Red Hat OpenShift Container Platform 4Red Hat |
References
- https://access.redhat.com/security/cve/CVE-2026-90994vdb-entry
- RHBZ#2479455issue-tracking
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