Sssd: race condition during authorization leads to gpo policies functioning inconsistently

Description

A race condition flaw was found in sssd where the GPO policy is not consistently applied for authenticated users. This may lead to improper authorization issues, granting or denying access to resources inappropriately.

Scores

EPSS (exploitation in 30 days)

1.0% · top 36% of all CVEs (6 Nov 2026)

CISA SSVC

Exploitation: none · Automatable: no · Technical impact: total

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.1.

Weakness

• CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') (opens in a new tab)All about CWE-362 and its CVEs

Affected products

• sssd

  • affected < 2.9.5

• Red Hat · Red Hat Enterprise Linux 8

  • unaffected 0:2.9.4-3.el8_10 – < *

• Red Hat · Red Hat Enterprise Linux 8

  • unaffected 0:2.9.4-3.el8_10 – < *

• Red Hat · Red Hat Enterprise Linux 8.6 Extended Update Support

  • unaffected 0:2.6.2-4.el8_6.3 – < *

• Red Hat · Red Hat Enterprise Linux 8.8 Extended Update Support

  • unaffected 0:2.8.2-4.el8_8.2 – < *

• Red Hat · Red Hat Enterprise Linux 9

  • unaffected 0:2.9.4-6.el9_4 – < *

• Red Hat · Red Hat Enterprise Linux 9

  • unaffected 0:2.9.4-6.el9_4 – < *

• Red Hat · Red Hat Enterprise Linux 9.0 Extended Update Support

  • unaffected 0:2.6.2-4.el9_0.3 – < *

• Red Hat · Red Hat Enterprise Linux 9.2 Extended Update Support

  • unaffected 0:2.8.2-5.el9_2.4 – < *

• Red Hat · Red Hat Virtualization 4 for Red Hat Enterprise Linux 8

  • unaffected 0:2.6.2-4.el8_6.3 – < *

• Red Hat · Red Hat Enterprise Linux 6

  All versions: unknown

• Red Hat · Red Hat Enterprise Linux 7

  All versions: unknown

What to do

Workaround: A mitigation can be applied to the sssd.conf file that would make the occurrence of the race condition more difficult: 1. Increase the GPO cache time out editing the following configuration directive in sssd.conf file: a) ad_gpo_cache_timeout = 3600 Ps.: This value (3600) should make the cache time out in one hour but would make GPO updates propagation from AD server to local machines take longer. [1] https://access.redhat.com/documentation/pt-br/red_hat_enterprise_linux/7/html/windows_integration_guide/sssd-gpo

References (13)

• RHSA-2024:1919 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• RHSA-2024:1920 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• RHSA-2024:1921 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• RHSA-2024:1922 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• RHSA-2024:2571 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• RHSA-2024:3270 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• https://access.redhat.com/security/cve/CVE-2023-3758 (opens in a new tab)vdb-entryx_refsource_REDHATx_transferred
• RHBZ#2223762 (opens in a new tab)issue-trackingx_refsource_REDHATx_transferred
• https://github.com/SSSD/sssd/pull/7302 (opens in a new tab)x_transferred
• https://lists.fedoraproject.org/archives/list/[email protected]/message/RV3HIZI3SURBUQKSOOL3XE64OOBQ2HTK/ (opens in a new tab)x_transferred
• https://lists.fedoraproject.org/archives/list/[email protected]/message/XEP62IDS7A55D5UHM6GH7QZ7SQFOAPVF/ (opens in a new tab)x_transferred
• https://lists.fedoraproject.org/archives/list/[email protected]/message/XMORAO2BDDA5YX4ZLMXDZ7SM6KU47SY5/ (opens in a new tab)x_transferred
• https://lists.debian.org/debian-lts-announce/2025/02/msg00008.html (opens in a new tab)

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisories (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2023-3758](https://trackcve.app/badge/CVE-2023-3758.svg)](https://trackcve.app/cve/CVE-2023-3758)

Record last updated 6 Nov 2025, 22:57 UTC.