CVE-2026-68743

HIGHNVD 7.17.1—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.1 under NVD CVSS v3. EPSS exploit probability: 0.1%, top 97% of all CVEs by exploit prediction. GitHub Security Advisory enrichment pending alignment with NVD CVSS.

Triggered by: NVD CVSS baseline
Sources: epss, ghsa, nvd
Trending — 4 sources updated this week
7.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.1Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

A flaw was found in SSSD. The extract_authtok_v1() function in the PAM responder does not validate the auth_token_length field against the remaining buffer size before processing. A local attacker can exploit this via a crafted protocol v1 request to the PAM responder socket, causing an out-of-bounds read and process crash, resulting in a denial of service.

CVSS v3
7.1
EG Score
7.1(medium)
EG Risk
37(Track)
EG Risk 37/100SSVC: Track

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
Severity71% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
3%
KEV
Not listed

Published

August 4, 2026

Last Modified

August 17, 2026

Advisory Details (2)

Auto-updated Aug 4, 2026
Patch available. Sources: redhat.
redhat

2509760 – (CVE-2026-68743) CVE-2026-68743 sssd: sssd: PAM responder out-of-bounds read via unchecked auth_token_length in protocol v1

https://bugzilla.redhat.com/show_bug.cgi?id=2509760
redhat Patch Available

CVE-2026-68743 - 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-2026-68743

Vendor Advisories for CVE-2026-68743(1)

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

Affected Packages

(3 across 3 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
sssd2.10.1-1 ... 2.9.5-5 (47 versions)——
Debian:12(1)
PackageVulnerable rangeFixed inDependents
sssd2.10.1-1 ... 2.9.5-5 (23 versions)——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
sssd2.10.1-2 ... 2.12.0-4 (8 versions)——

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 29× in last 7d / 56× 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. 2026-08-21 04:58 UTCEG score recompute
  2. 2026-08-21 04:58 UTCGHSA enrichment
  3. 2026-08-20 22:56 UTCEPSS rescore
  4. 2026-08-20 16:50 UTCGHSA enrichment
  5. 2026-08-20 04:27 UTCEG score recompute
  6. 2026-08-20 04:27 UTCGHSA enrichment
  7. 2026-08-19 17:04 UTCEPSS rescore
  8. 2026-08-19 16:19 UTCGHSA enrichment
  9. 2026-08-19 03:55 UTCGHSA enrichment
  10. 2026-08-18 15:48 UTCEG score recompute
  11. 2026-08-18 15:48 UTCGHSA enrichment
  12. 2026-08-18 13:49 UTCEPSS rescore
  13. 2026-08-18 13:49 UTCEPSS rescore
  14. 2026-08-18 01:33 UTCEG score recompute
  15. 2026-08-18 01:33 UTCGHSA enrichment
  16. 2026-08-17 13:47 UTCEPSS rescore
  17. 2026-08-17 13:26 UTCEG score recompute▲ 1.60
  18. 2026-08-17 13:26 UTCGHSA enrichment
  19. 2026-08-17 13:25 UTCNVD updateCVSS v3 → 7.1 · severity → HIGH
  20. 2026-08-17 06:50 UTCEG score recompute
  21. 2026-08-17 06:50 UTCGHSA enrichment
  22. 2026-08-16 14:56 UTCEPSS rescore
  23. 2026-08-16 14:56 UTCEPSS rescore
  24. 2026-08-16 05:21 UTCEG score recompute
  25. 2026-08-16 05:21 UTCGHSA enrichment
Show 31 more
  1. 2026-08-16 02:15 UTCEPSS rescore
  2. 2026-08-15 03:51 UTCEG score recompute
  3. 2026-08-15 03:51 UTCGHSA enrichment
  4. 2026-08-15 01:30 UTCEPSS rescore
  5. 2026-08-14 02:20 UTCEG score recompute
  6. 2026-08-14 02:20 UTCGHSA enrichment
  7. 2026-08-13 22:00 UTCEPSS rescore
  8. 2026-08-13 00:50 UTCEG score recompute
  9. 2026-08-13 00:50 UTCGHSA enrichment
  10. 2026-08-12 13:51 UTCEPSS rescore
  11. 2026-08-11 23:20 UTCEG score recompute
  12. 2026-08-11 23:20 UTCGHSA enrichment
  13. 2026-08-10 21:50 UTCGHSA enrichment
  14. 2026-08-09 20:20 UTCEG score recompute
  15. 2026-08-09 20:20 UTCGHSA enrichment
  16. 2026-08-09 13:47 UTCEPSS rescore
  17. 2026-08-08 18:50 UTCEG score recompute
  18. 2026-08-08 18:50 UTCGHSA enrichment
  19. 2026-08-08 16:37 UTCEPSS rescore
  20. 2026-08-07 17:20 UTCEG score recompute
  21. 2026-08-07 17:20 UTCGHSA enrichment
  22. 2026-08-06 15:49 UTCEG score recompute
  23. 2026-08-06 15:49 UTCGHSA enrichment
  24. 2026-08-06 13:47 UTCEPSS rescore
  25. 2026-08-05 22:03 UTCEG score recompute
  26. 2026-08-05 22:03 UTCGHSA enrichment
  27. 2026-08-05 19:17 UTCEPSS rescore
  28. 2026-08-05 19:17 UTCEPSS rescore
  29. 2026-08-04 19:25 UTCEG score recompute
  30. 2026-08-04 18:56 UTCEG score recompute
  31. 2026-08-04 18:55 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-68743?
CVE-2026-68743 is a high vulnerability published on August 4, 2026. A flaw was found in SSSD. The extractauthtokv1() function in the PAM responder does not validate the authtokenlength field against the remaining buffer size before processing. A local attacker can exploit this via a crafted protocol v1 request to the PAM responder socket, causing an out-of-bounds…
When was CVE-2026-68743 disclosed?
CVE-2026-68743 was first published in the National Vulnerability Database on August 4, 2026, with the most recent update on August 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-68743 actively exploited?
CVE-2026-68743 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 96.7% of all scored CVEs.
What is the CVSS score of CVE-2026-68743?
CVE-2026-68743 has a CVSS v3 base score of 7.1 (NVD).
How do I remediate CVE-2026-68743?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-68743, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-68743

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