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 / 34× 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 199 total refreshes for this CVE.

  1. 2026-09-15 03:12 UTCEPSS rescore
  2. 2026-09-11 14:53 UTCEPSS rescore
  3. 2026-09-11 09:37 UTCEPSS rescore
  4. 2026-09-08 22:01 UTCEPSS rescore
  5. 2026-09-07 16:01 UTCEPSS rescore
  6. 2026-09-06 13:47 UTCEPSS rescore
  7. 2026-09-04 05:07 UTCEPSS rescore
  8. 2026-09-02 14:12 UTCEPSS rescore
  9. 2026-09-01 13:54 UTCEPSS rescore
  10. 2026-09-01 12:27 UTCGHSA enrichment
  11. 2026-09-01 11:50 UTCEG score recompute
  12. 2026-09-01 11:50 UTCGHSA enrichment
  13. 2026-09-01 04:40 UTCEPSS rescore
  14. 2026-08-31 16:42 UTCGHSA enrichment
  15. 2026-08-31 15:08 UTCEG score recompute
  16. 2026-08-31 15:08 UTCGHSA enrichment
  17. 2026-08-30 19:17 UTCEPSS rescore
  18. 2026-08-30 01:22 UTCEPSS rescore
  19. 2026-08-28 21:42 UTCEPSS rescore
  20. 2026-08-26 14:47 UTCEPSS rescore
  21. 2026-08-25 13:49 UTCEPSS rescore
  22. 2026-08-23 00:19 UTCEPSS rescore
  23. 2026-08-21 23:49 UTCEPSS rescore
  24. 2026-08-21 21:25 UTCVendor advisory
  25. 2026-08-21 21:25 UTCGHSA enrichment
Show 75 more
  1. 2026-08-21 21:05 UTCEG score recompute
  2. 2026-08-21 21:05 UTCVendor advisory
  3. 2026-08-21 21:05 UTCGHSA enrichment
  4. 2026-08-20 22:56 UTCEPSS rescore
  5. 2026-08-18 13:49 UTCEPSS rescore
  6. 2026-08-18 13:49 UTCEPSS rescore
  7. 2026-08-17 13:47 UTCEPSS rescore
  8. 2026-08-16 14:56 UTCEPSS rescore
  9. 2026-08-16 14:56 UTCEPSS rescore
  10. 2026-08-16 06:39 UTCEG score recompute
  11. 2026-08-16 06:39 UTCVendor advisory
  12. 2026-08-16 06:39 UTCGHSA enrichment
  13. 2026-08-16 02:15 UTCEPSS rescore
  14. 2026-08-15 01:31 UTCEPSS rescore
  15. 2026-08-14 04:44 UTCEG score recompute
  16. 2026-08-14 04:44 UTCVendor advisory
  17. 2026-08-14 04:44 UTCGHSA enrichment
  18. 2026-08-13 22:00 UTCEPSS rescore
  19. 2026-08-12 16:36 UTCEG score recompute
  20. 2026-08-12 16:36 UTCVendor advisory
  21. 2026-08-12 16:36 UTCGHSA enrichment
  22. 2026-08-12 13:51 UTCEPSS rescore
  23. 2026-08-12 00:38 UTCEG score recompute
  24. 2026-08-12 00:38 UTCVendor advisory
  25. 2026-08-12 00:37 UTCGHSA enrichment
  26. 2026-08-11 02:38 UTCEG score recompute
  27. 2026-08-11 02:38 UTCVendor advisory
  28. 2026-08-11 02:38 UTCGHSA enrichment
  29. 2026-08-11 00:00 UTCEPSS rescore
  30. 2026-08-10 01:56 UTCEG score recompute
  31. 2026-08-10 01:56 UTCVendor advisory
  32. 2026-08-10 01:56 UTCGHSA enrichment
  33. 2026-08-09 13:47 UTCEPSS rescore
  34. 2026-08-09 04:01 UTCEG score recompute
  35. 2026-08-09 04:01 UTCVendor advisory
  36. 2026-08-09 04:01 UTCGHSA enrichment
  37. 2026-08-08 16:37 UTCEPSS rescore
  38. 2026-08-07 19:28 UTCEG score recompute
  39. 2026-08-07 19:28 UTCVendor advisory
  40. 2026-08-07 19:28 UTCGHSA enrichment
  41. 2026-08-06 21:33 UTCEG score recompute
  42. 2026-08-06 21:33 UTCVendor advisory
  43. 2026-08-06 21:33 UTCGHSA enrichment
  44. 2026-08-06 13:47 UTCEPSS rescore
  45. 2026-08-05 23:23 UTCEG score recompute
  46. 2026-08-05 23:23 UTCVendor advisory
  47. 2026-08-05 23:23 UTCGHSA enrichment
  48. 2026-08-05 19:17 UTCEPSS rescore
  49. 2026-08-05 19:17 UTCEPSS rescore
  50. 2026-08-04 15:10 UTCEPSS rescore
  51. 2026-08-04 10:39 UTCEPSS rescore
  52. 2026-08-03 21:35 UTCEG score recompute
  53. 2026-08-03 21:35 UTCVendor advisory
  54. 2026-08-03 21:35 UTCGHSA enrichment
  55. 2026-08-03 10:36 UTCEPSS rescore
  56. 2026-08-02 13:14 UTCEG score recompute
  57. 2026-08-02 13:14 UTCVendor advisory
  58. 2026-08-02 13:14 UTCGHSA enrichment
  59. 2026-08-02 02:27 UTCEPSS rescore
  60. 2026-08-01 04:16 UTCEPSS rescore
  61. 2026-07-30 16:28 UTCEPSS rescore
  62. 2026-07-30 01:30 UTCEPSS rescore
  63. 2026-07-28 15:37 UTCEPSS rescore
  64. 2026-07-27 14:14 UTCEPSS rescore
  65. 2026-07-26 14:54 UTCEPSS rescore
  66. 2026-07-26 14:54 UTCEPSS rescore
  67. 2026-07-25 14:18 UTCEPSS rescore
  68. 2026-07-25 14:18 UTCEPSS rescore
  69. 2026-07-24 14:18 UTCEPSS rescore
  70. 2026-07-24 14:18 UTCEPSS rescore
  71. 2026-07-23 14:18 UTCEPSS rescore
  72. 2026-07-23 14:18 UTCEPSS rescore
  73. 2026-07-23 03:22 UTCEG score recompute
  74. 2026-07-22 14:08 UTCEPSS rescore
  75. 2026-07-22 14:08 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 96.7% 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.

Dependency Blast Radius

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