CVE-2026-90994

MEDIUMPre-NVD 4.04.0—
EchelonGraph scoreHIGH confidence

Score 4.0 from GitHub Security Advisory published 2026-09-14. The CNA's CVSS baseline 4.0; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:redhat, epss, ghsa
Trending — 3 sources updated this week
4.0EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 4.0Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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.

CVSS v3
4.0
EG Score
4.0MEDIUMhigh confidence
EG Risk
18
EG Risk 18/100CISA SSVC

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity40% × 45%
Exploitation0% × 40%
Automatability0% × 15%
CISA SSVC: Track at every mission impact level.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.2%
EPSS %ILE
5th
KEV
Not listed

CISA SSVCTrack at every mission impact level.

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

September 14, 2026

Last Modified

September 22, 2026

Advisory Details (2)

Auto-updated Sep 14, 2026
Patch available. Sources: redhat.
redhat

2479455 – (CVE-2026-90994) CVE-2026-90994 sssd: sssd: Denial of Service via malformed PAM v1 requests

https://bugzilla.redhat.com/show_bug.cgi?id=2479455
redhat Patch Available

CVE-2026-90994 - Red Hat Customer Portal

Affected: Red Hat Enterprise Linux 8 or OpenShift Container Platform 4, is affected by this vulnerability and a fix may be released to a

https://access.redhat.com/security/cve/CVE-2026-90994

Vendor Advisories for CVE-2026-90994(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(2 across 2 ecosystems)
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
sssd2.10.1-1 ... 2.9.5-5 (26 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
sssd2.10.1-2 ... 2.13.1-3 (11 versions)
  • every version on: no fix on record
—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 18× in last 7d / 64× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-10-04 23:22 UTCEPSS rescore
  2. 2026-10-04 16:54 UTCGHSA enrichment
  3. 2026-10-03 18:52 UTCEG score recompute
  4. 2026-10-03 18:52 UTCGHSA enrichment
  5. 2026-10-02 20:47 UTCEG score recompute
  6. 2026-10-02 20:47 UTCGHSA enrichment
  7. 2026-10-01 22:43 UTCEG score recompute
  8. 2026-10-01 22:43 UTCGHSA enrichment
  9. 2026-10-01 19:51 UTCEPSS rescore
  10. 2026-10-01 00:45 UTCEG score recompute
  11. 2026-10-01 00:45 UTCGHSA enrichment
  12. 2026-09-30 15:04 UTCEPSS rescore
  13. 2026-09-30 01:29 UTCEG score recompute
  14. 2026-09-30 01:29 UTCGHSA enrichment
  15. 2026-09-29 00:55 UTCEG score recompute
  16. 2026-09-29 00:55 UTCGHSA enrichment
  17. 2026-09-28 13:52 UTCEPSS rescore
  18. 2026-09-28 13:52 UTCEPSS rescore
  19. 2026-09-28 02:58 UTCEG score recompute
  20. 2026-09-28 02:58 UTCGHSA enrichment
  21. 2026-09-27 13:49 UTCEPSS rescore
  22. 2026-09-27 05:00 UTCEG score recompute
  23. 2026-09-27 05:00 UTCGHSA enrichment
  24. 2026-09-26 15:59 UTCEPSS rescore
  25. 2026-09-26 06:50 UTCEG score recompute
Show 39 more
  1. 2026-09-26 06:49 UTCGHSA enrichment
  2. 2026-09-25 08:47 UTCEG score recompute
  3. 2026-09-25 08:47 UTCGHSA enrichment
  4. 2026-09-24 14:04 UTCEPSS rescore
  5. 2026-09-24 10:50 UTCEG score recompute
  6. 2026-09-24 10:50 UTCGHSA enrichment
  7. 2026-09-23 17:54 UTCEPSS rescore
  8. 2026-09-23 12:53 UTCEG score recompute
  9. 2026-09-23 12:53 UTCGHSA enrichment
  10. 2026-09-22 16:01 UTCEPSS rescore
  11. 2026-09-22 14:55 UTCEG score recompute
  12. 2026-09-22 14:55 UTCGHSA enrichment
  13. 2026-09-22 09:24 UTCEG score recompute
  14. 2026-09-22 09:24 UTCGHSA enrichment
  15. 2026-09-21 21:09 UTCEPSS rescore
  16. 2026-09-21 11:26 UTCEG score recompute
  17. 2026-09-21 11:26 UTCGHSA enrichment
  18. 2026-09-20 20:16 UTCEPSS rescore
  19. 2026-09-20 13:28 UTCEG score recompute
  20. 2026-09-20 13:28 UTCGHSA enrichment
  21. 2026-09-19 15:30 UTCEG score recompute
  22. 2026-09-19 15:30 UTCGHSA enrichment
  23. 2026-09-18 19:28 UTCEPSS rescore
  24. 2026-09-18 17:30 UTCGHSA enrichment
  25. 2026-09-17 19:33 UTCEG score recompute
  26. 2026-09-17 19:33 UTCGHSA enrichment
  27. 2026-09-17 19:32 UTCEPSS rescore
  28. 2026-09-16 19:58 UTCEG score recompute
  29. 2026-09-16 19:58 UTCGHSA enrichment
  30. 2026-09-16 14:09 UTCEPSS rescore
  31. 2026-09-16 13:49 UTCEG score recompute
  32. 2026-09-16 13:49 UTCGHSA enrichment
  33. 2026-09-16 05:15 UTCEPSS rescore
  34. 2026-09-15 15:42 UTCEG score recompute
  35. 2026-09-15 15:42 UTCGHSA enrichment
  36. 2026-09-14 16:35 UTCEG score recompute
  37. 2026-09-14 16:24 UTCEG score recompute
  38. 2026-09-14 16:05 UTCEG score recompute
  39. 2026-09-14 16:04 UTCMITRE cvelistV5first tracked

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-90994?
CVE-2026-90994 is a medium vulnerability published on September 14, 2026. A flaw was found in sssd, specifically within the PAM (Pluggable Authentication Modules) responder's protocol v1 parser, pamparsein_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.…
When was CVE-2026-90994 disclosed?
CVE-2026-90994 was first published on September 14, 2026, with the most recent update on September 22, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-90994 actively exploited?
CVE-2026-90994 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (5th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-90994?
CVE-2026-90994 has a CVSS base score of 4.0 (the CNA's own assessment, by redhat; NVD's own analysis pending).
How do I remediate CVE-2026-90994?
A fix for CVE-2026-90994 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-90994 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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