CVE-2026-6245

MEDIUMNVD 5.55.5—
EchelonGraph scoreMEDIUM confidence

Score 5.5 from GitHub Security Advisory published 2026-04-15. NVD baseline CVSS 5.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
5.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.5Exploit: None knownExposed: 0

A fix is available — apply it.

A flaw was found in the System Security Services Daemon (SSSD). The pam_passkey_child_read_data() function within the PAM passkey responder fails to properly handle raw bytes received from a pipe. Because the data is treated as a NUL-terminated C string without explicit termination, it results in an out-of-bounds read when processed by functions like snprintf(). A local attacker could potentially trigger this vulnerability by initiating a crafted passkey authentication request, causing the SSSD PAM responder to crash, resulting in a local Denial of Service (DoS).

CVSS v3
5.5
EG Score
5.5(medium)
EG Risk
25(Track)
EG Risk 25/100SSVC: 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
Severity55% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
3%
KEV
Not listed

Published

April 15, 2026

Last Modified

September 1, 2026

Advisory Details (2)

Auto-updated Aug 2, 2026
Patch available. Sources: redhat.
redhat

2457954 – (CVE-2026-6245) CVE-2026-6245 sssd: out-of-bounds read in the sssd

https://bugzilla.redhat.com/show_bug.cgi?id=2457954
redhat Patch Available

cve-details

https://access.redhat.com/security/cve/CVE-2026-6245

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntusssd-tools (2.12.0-1ubuntu5.1) @ resolute2026-08-21ubuntu

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(1 across 1 ecosystem)
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.

All Vendor Advisories

(1)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 4× in last 7d / 32× 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.

Showing the most recent 100 of 202 total refreshes for this CVE.

  1. 2026-09-18 19:28 UTCEPSS rescore
  2. 2026-09-16 14:08 UTCEPSS rescore
  3. 2026-09-16 05:15 UTCEPSS rescore
  4. 2026-09-15 03:12 UTCEPSS rescore
  5. 2026-09-11 14:53 UTCEPSS rescore
  6. 2026-09-11 09:37 UTCEPSS rescore
  7. 2026-09-08 22:01 UTCEPSS rescore
  8. 2026-09-07 16:01 UTCEPSS rescore
  9. 2026-09-06 13:47 UTCEPSS rescore
  10. 2026-09-04 05:07 UTCEPSS rescore
  11. 2026-09-02 14:12 UTCEPSS rescore
  12. 2026-09-01 13:54 UTCEPSS rescore
  13. 2026-09-01 12:27 UTCGHSA enrichment
  14. 2026-09-01 11:50 UTCEG score recompute
  15. 2026-09-01 11:50 UTCGHSA enrichment
  16. 2026-09-01 04:40 UTCEPSS rescore
  17. 2026-08-31 16:42 UTCGHSA enrichment
  18. 2026-08-31 15:08 UTCEG score recompute
  19. 2026-08-31 15:08 UTCGHSA enrichment
  20. 2026-08-30 19:17 UTCEPSS rescore
  21. 2026-08-30 01:22 UTCEPSS rescore
  22. 2026-08-28 21:42 UTCEPSS rescore
  23. 2026-08-26 14:47 UTCEPSS rescore
  24. 2026-08-25 13:49 UTCEPSS rescore
  25. 2026-08-23 00:19 UTCEPSS rescore
Show 75 more
  1. 2026-08-21 23:49 UTCEPSS rescore
  2. 2026-08-21 21:25 UTCVendor advisory
  3. 2026-08-21 21:25 UTCGHSA enrichment
  4. 2026-08-21 21:05 UTCEG score recompute
  5. 2026-08-21 21:05 UTCVendor advisory
  6. 2026-08-21 21:05 UTCGHSA enrichment
  7. 2026-08-20 22:56 UTCEPSS rescore
  8. 2026-08-18 13:49 UTCEPSS rescore
  9. 2026-08-18 13:49 UTCEPSS rescore
  10. 2026-08-17 13:47 UTCEPSS rescore
  11. 2026-08-16 14:56 UTCEPSS rescore
  12. 2026-08-16 14:56 UTCEPSS rescore
  13. 2026-08-16 06:39 UTCEG score recompute
  14. 2026-08-16 06:39 UTCVendor advisory
  15. 2026-08-16 06:39 UTCGHSA enrichment
  16. 2026-08-16 02:15 UTCEPSS rescore
  17. 2026-08-15 01:31 UTCEPSS rescore
  18. 2026-08-14 04:44 UTCEG score recompute
  19. 2026-08-14 04:44 UTCVendor advisory
  20. 2026-08-14 04:44 UTCGHSA enrichment
  21. 2026-08-13 22:00 UTCEPSS rescore
  22. 2026-08-12 16:36 UTCEG score recompute
  23. 2026-08-12 16:36 UTCVendor advisory
  24. 2026-08-12 16:36 UTCGHSA enrichment
  25. 2026-08-12 13:51 UTCEPSS rescore
  26. 2026-08-12 00:38 UTCEG score recompute
  27. 2026-08-12 00:38 UTCVendor advisory
  28. 2026-08-12 00:37 UTCGHSA enrichment
  29. 2026-08-11 02:38 UTCEG score recompute
  30. 2026-08-11 02:38 UTCVendor advisory
  31. 2026-08-11 02:38 UTCGHSA enrichment
  32. 2026-08-11 00:00 UTCEPSS rescore
  33. 2026-08-10 01:56 UTCEG score recompute
  34. 2026-08-10 01:56 UTCVendor advisory
  35. 2026-08-10 01:56 UTCGHSA enrichment
  36. 2026-08-09 13:47 UTCEPSS rescore
  37. 2026-08-09 04:01 UTCEG score recompute
  38. 2026-08-09 04:01 UTCVendor advisory
  39. 2026-08-09 04:01 UTCGHSA enrichment
  40. 2026-08-08 16:37 UTCEPSS rescore
  41. 2026-08-07 19:28 UTCEG score recompute
  42. 2026-08-07 19:28 UTCVendor advisory
  43. 2026-08-07 19:28 UTCGHSA enrichment
  44. 2026-08-06 21:33 UTCEG score recompute
  45. 2026-08-06 21:33 UTCVendor advisory
  46. 2026-08-06 21:33 UTCGHSA enrichment
  47. 2026-08-06 13:47 UTCEPSS rescore
  48. 2026-08-05 23:23 UTCEG score recompute
  49. 2026-08-05 23:23 UTCVendor advisory
  50. 2026-08-05 23:23 UTCGHSA enrichment
  51. 2026-08-05 19:17 UTCEPSS rescore
  52. 2026-08-05 19:17 UTCEPSS rescore
  53. 2026-08-04 15:10 UTCEPSS rescore
  54. 2026-08-04 10:39 UTCEPSS rescore
  55. 2026-08-03 21:35 UTCEG score recompute
  56. 2026-08-03 21:35 UTCVendor advisory
  57. 2026-08-03 21:35 UTCGHSA enrichment
  58. 2026-08-03 10:36 UTCEPSS rescore
  59. 2026-08-02 13:14 UTCEG score recompute
  60. 2026-08-02 13:14 UTCVendor advisory
  61. 2026-08-02 13:14 UTCGHSA enrichment
  62. 2026-08-02 02:27 UTCEPSS rescore
  63. 2026-08-01 04:16 UTCEPSS rescore
  64. 2026-07-30 16:28 UTCEPSS rescore
  65. 2026-07-30 01:30 UTCEPSS rescore
  66. 2026-07-28 15:37 UTCEPSS rescore
  67. 2026-07-27 14:14 UTCEPSS rescore
  68. 2026-07-26 14:54 UTCEPSS rescore
  69. 2026-07-26 14:54 UTCEPSS rescore
  70. 2026-07-25 14:18 UTCEPSS rescore
  71. 2026-07-25 14:18 UTCEPSS rescore
  72. 2026-07-24 14:18 UTCEPSS rescore
  73. 2026-07-24 14:18 UTCEPSS rescore
  74. 2026-07-23 14:18 UTCEPSS rescore
  75. 2026-07-23 14:18 UTCEPSS rescore

Frequently asked(5)

What is CVE-2026-6245?
CVE-2026-6245 is a medium vulnerability published on April 15, 2026. A flaw was found in the System Security Services Daemon (SSSD). The pampasskeychildreaddata() function within the PAM passkey responder fails to properly handle raw bytes received from a pipe. Because the data is treated as a NUL-terminated C string without explicit termination, it results in an…
When was CVE-2026-6245 disclosed?
CVE-2026-6245 was first published in the National Vulnerability Database on April 15, 2026, with the most recent update on September 1, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-6245 actively exploited?
CVE-2026-6245 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 96.6% of all scored CVEs.
What is the CVSS score of CVE-2026-6245?
CVE-2026-6245 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2026-6245?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-6245, 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.

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