CVE-2025-37778

HIGHNVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2025-05-01. NVD baseline CVSS 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 4 sources updated this week
7.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 7.8Exploit: None knownExposed: 0

A fix is available — apply it.

In the Linux kernel, the following vulnerability has been resolved:

ksmbd: Fix dangling pointer in krb_authenticate

krb_authenticate frees sess->user and does not set the pointer to NULL. It calls ksmbd_krb5_authenticate to reinitialise sess->user but that function may return without doing so. If that happens then smb2_sess_setup, which calls krb_authenticate, will be accessing free'd memory when it later uses sess->user.

CVSS v3
7.8
EG Score
7.8(medium)
EG Risk
40(Track)
EG Risk 40/100SSVC: 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
Severity78% × 45%
Exploitation1% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
61%
KEV
Not listed

Published

May 1, 2025

Last Modified

August 5, 2026

Advisory Details (6)

Auto-updated Aug 4, 2026
No patch confirmed yet.
generic

ksmbd: Fix dangling pointer in krb_authenticate - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/1e440d5b25b7efccb3defe542a73c51005799a5f
generic

ksmbd: Fix dangling pointer in krb_authenticate - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/e83e39a5f6a01a81411a4558a59a10f87aa88dd6
generic

ksmbd: Fix dangling pointer in krb_authenticate - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/6e30c0e10210c714f3d4453dc258d4abcc70364e
generic

ksmbd: Fix dangling pointer in krb_authenticate - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/1db2451de23e98bc864c6a6e52aa0d82c91cb325
generic

ksmbd: Fix dangling pointer in krb_authenticate - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/d5b554bc8d554ed6ddf443d3db2fad9f665cec10
generic

ksmbd: Fix dangling pointer in krb_authenticate - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/b61f04d5d73c53d183019bafe22fb700a739bac5

Vendor Advisories for CVE-2025-37778(1)

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

Patch Availability(20)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-tools-realtime-6.8.1 (6.8.1-1041.42) @ noble2026-05-21ubuntu
ubuntulinux-virtual-hwe-24.04-edge (6.14.0-22.22) @ plucky2026-05-21ubuntu
ubuntulinux-tools-nvidia-lowlatency-64k-6.8 (6.8.0-1046.49.1) @ noble2026-05-21ubuntu
ubuntulinux-tools-gke-64k-6.8 (6.8.0-1043.48) @ noble2026-05-21ubuntu
ubuntulinux-tools-oracle-64k (6.14.0-1007.7) @ plucky2026-05-21ubuntu
ubuntulinux-tools-azure (6.14.0-1007.7) @ plucky2026-05-21ubuntu
ubuntulinux-tools-azure-edge (6.8.0-1051.57~22.04.1) @ jammy2026-05-21ubuntu
ubuntulinux-tools-gcp-edge (6.8.0-1047.50~22.04.2) @ jammy2026-05-21ubuntu
ubuntulinux-tools-gcp-fips-6.8 (6.8.0-1047.50+fips1) @ noble2026-05-21ubuntu
ubuntulinux-tools-oracle-lts-24.04 (6.8.0-1043.44) @ noble2026-05-21ubuntu
ubuntulinux-tools-ibm-lts-24.04 (6.8.0-1044.44) @ noble2026-05-21ubuntu
ubuntulinux-tools-fips-6.8 (6.8.0-100.100+fips1) @ noble2026-05-21ubuntu
ubuntulinux-virtual-6.8 (6.8.0-100.100) @ noble2026-05-21ubuntu
ubuntulinux-tools-realtime-hwe-22.04 (6.8.1-1041.42~22.04.1) @ jammy2026-05-21ubuntu
ubuntulinux-tools-azure-lts-24.04 (6.8.0-1046.52) @ noble2026-05-21ubuntu
ubuntulinux-virtual-hwe-22.04-edge (6.8.0-100.100~22.04.1) @ jammy2026-05-21ubuntu
ubuntulinux-tools-lowlatency-hwe-20.04-edge (6.8.0-100.100.1) @ noble2026-05-21ubuntu
ubuntulinux-xilinx-zynqmp (6.8.0.1023.24) @ noble2026-05-21ubuntu
ubuntulinux-tools-azure-fips-6.8 (6.8.0-1046.52+fips1) @ noble2026-05-21ubuntu
linuxKernel @ 5.15.203—osv

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.

Additional Vendor Advisories

(24)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 14× in last 7d / 48× 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 145 total refreshes for this CVE.

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

Related CVEs(same product + same vendor + same CWE)

Frequently asked(5)

What is CVE-2025-37778?
CVE-2025-37778 is a high vulnerability published on May 1, 2025. In the Linux kernel, the following vulnerability has been resolved: ksmbd: Fix dangling pointer in krb_authenticate krb_authenticate frees sess->user and does not set the pointer to NULL. It calls ksmbdkrb5authenticate to reinitialise sess->user but that function may return without doing so. If…
When was CVE-2025-37778 disclosed?
CVE-2025-37778 was first published in the National Vulnerability Database on May 1, 2025, with the most recent update on August 5, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-37778 actively exploited?
CVE-2025-37778 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 38.7% of all scored CVEs.
What is the CVSS score of CVE-2025-37778?
CVE-2025-37778 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2025-37778?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-37778, 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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