CVE-2026-54411

MEDIUMPre-NVD 5.95.9—
EchelonGraph scoreMEDIUM confidence

Score 5.9 from GitHub Security Advisory published 2026-06-14. a secondary CVSS source baseline 5.9; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
5.9
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 5.9Exploit: NoneExposed: 0

A fix is available — apply it.

Linux-PAM through 1.7.2 contains an observable timing discrepancy (CWE-208) in the pam_userdb module's plaintext-password comparison path in modules/pam_userdb/pam_userdb.c that allows a local or network-adjacent attacker able to repeatedly drive authentication through a calling service to recover the plaintext password of a target account by measuring response-timing differences. The comparison uses strncmp() (or strncasecmp() when PAM_ICASE_ARG is set) preceded by a length-equality check, so the time to reject a candidate depends on the index of the first differing byte and on whether the candidate's length matches the stored password, leaking the password length and individual prefix bytes. The vulnerable path is reached when the administrator configures pam_userdb with crypt=none, with an unrecognized crypt method, or without a crypt= argument, causing the module to store and compare credentials in plaintext.

CVSS v3
5.9
EG Score
5.9(medium)
EG Risk
—
EPSS
25.7%
KEV
Not listed

Published

June 14, 2026

Last Modified

June 16, 2026

Advisory Details (4)

Auto-updated Jun 15, 2026
No patch confirmed yet.
generic

CWE - CWE-208: Observable Timing Discrepancy (4.20)

https://cwe.mitre.org/data/definitions/208.html
generic

linux-pam/libpam/include/pam_inline.h at master · linux-pam/linux-pam · GitHub

https://github.com/linux-pam/linux-pam/blob/master/libpam/include/pam_inline.h
generic

linux-pam/modules/pam_userdb/pam_userdb.c at master · linux-pam/linux-pam · GitHub

https://github.com/linux-pam/linux-pam/blob/master/modules/pam_userdb/pam_userdb.c#L327
generic

GitHub - linux-pam/linux-pam: Linux PAM (Pluggable Authentication Modules for Linux) project · GitHub

https://github.com/linux-pam/linux-pam

Vendor Advisories for CVE-2026-54411(4)

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

Patch Availability(2)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatpam-main-1.7.2-2.2.hum12026-07-02redhat
redhatpam-main-1.7.2-1.1.hum12026-04-10redhat

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.

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 10× in last 7d / 88× 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 112 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-54411?
CVE-2026-54411 is a medium vulnerability published on June 14, 2026. Linux-PAM through 1.7.2 contains an observable timing discrepancy (CWE-208) in the pamuserdb module's plaintext-password comparison path in modules/pamuserdb/pamuserdb.c that allows a local or network-adjacent attacker able to repeatedly drive authentication through a calling service to recover the…
When was CVE-2026-54411 disclosed?
CVE-2026-54411 was first published in the National Vulnerability Database on June 14, 2026, with the most recent update on June 16, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-54411 actively exploited?
CVE-2026-54411 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 25.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-54411?
CVE-2026-54411 has a CVSS v3 base score of 5.9 (NVD).
How do I remediate CVE-2026-54411?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-54411, 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

Explore the affected products and dependency analysis for CVE-2026-54411

Explore →

Is Your Infrastructure Affected by CVE-2026-54411?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs