CVE-2025-37924

HIGHNVD 7.87.8
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to NVD's CVSS score.

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2025-05-20. NVD baseline CVSS 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, NVD CVSS v3
Elevated

Also known asEUVD-2025-15921 (ENISA EUVD) · GHSA-3x67-44wh-mrgf (GitHub Security Advisories)Source: ENISA EUVD

7.8EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 25%CVSS: 7.8Exploit: No code on recordExposed services: Not assessed

A fix is available — apply it.

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

ksmbd: fix use-after-free in kerberos authentication

Setting sess->user = NULL was introduced to fix the dangling pointer created by ksmbd_free_user. However, it is possible another thread could be operating on the session and make use of sess->user after it has been passed to ksmbd_free_user but before sess->user is set to NULL.

CVSS v3
7.8
EG Score
7.8HIGHmedium confidence
EG Risk
66
EG Risk 66/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity78% × 45%
Impact severity (EG Severity): CVSS 7.8 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation40% × 40%
EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.
Automatability100% × 15%
CISA's SSVC Automatable value: yes (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
25%
EPSS %ILE
97th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (7.8): severity, escalated by confirmed exploitation. This CVE's 7.8 is its impact severity (EG Severity), not escalated.

EG Severity
7.8 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
25% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-11-11). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at low or medium mission impact; Attend at high (mission-essential systems).CISA BOD 26-04: 3 days if the affected system is publicly exposed; 60 days if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)3 days if the affected system is publicly exposed; 60 days if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

May 20, 2025

Last Modified

October 15, 2026

Advisory Details (6)

Auto-updated Oct 8, 2026
Patch available.
Web page

ksmbd: fix use-after-free in kerberos authentication - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/e86e9134e1d1c90a960dd57f59ce574d27b9a124
Web page

ksmbd: fix use-after-free in kerberos authentication - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/28c756738af44a404a91b77830d017bb0c525890
Web page

ksmbd: fix use-after-free in kerberos authentication - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/e18c616718018dfc440e4a2d2b94e28fe91b1861
Web page

ksmbd: fix use-after-free in kerberos authentication - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/b447463562238428503cfba1c913261047772f90
Web page

ksmbd: fix use-after-free in kerberos authentication - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/e34a33d5d7e87399af0a138bb32f6a3e95dd83d2
Web pageMentions a patch (unverified)

[SECURITY] [DLA 4271-1] linux-6.1 security update

https://lists.debian.org/debian-lts-announce/2025/08/msg00010.html

Vendor Advisories for CVE-2025-37924(1)

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

Patch Availability(29)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntulinux-tools-fips-6.8 (6.8.0-100.100+fips1) @ noble2026-11-12ubuntu
ubuntulinux-tools-azure-6.14 (6.14.0-1010.10) @ plucky2026-11-12ubuntu
ubuntulinux-virtual-6.8 (6.8.0-100.100) @ noble2026-11-12ubuntu
ubuntulinux-tools-realtime-hwe-22.04 (6.8.1-1041.42~22.04.1) @ jammy2026-11-12ubuntu
ubuntulinux-tools-gcp-edge (6.8.0-1047.50~22.04.2) @ jammy2026-11-12ubuntu
ubuntulinux-tools-realtime-6.8.1 (6.8.1-1041.42) @ noble2026-11-12ubuntu
ubuntulinux-tools-aws-64k-6.14 (6.14.0-1009.9) @ plucky2026-11-12ubuntu
ubuntulinux-tools-oracle-64k-6.14 (6.14.0-1009.9) @ plucky2026-11-12ubuntu
ubuntulinux-tools-ibm-edge (6.8.0-1044.44~22.04.1) @ jammy2026-11-12ubuntu
ubuntulinux-virtual-hwe-24.04-edge (6.14.0-24.24) @ plucky2026-11-12ubuntu
ubuntulinux-tools-oracle-edge (6.8.0-1043.44~22.04.1) @ jammy2026-11-12ubuntu
ubuntulinux-tools-gcp-fips-6.8 (6.8.0-1047.50+fips1) @ noble2026-11-12ubuntu
ubuntulinux-virtual-hwe-22.04-edge (6.8.0-100.100~22.04.1) @ jammy2026-11-12ubuntu
ubuntulinux-tools-gke-64k-6.8 (6.8.0-1043.48) @ noble2026-11-12ubuntu
ubuntulinux-tools-lowlatency-hwe-20.04-edge (6.8.0-100.100.1) @ noble2026-11-12ubuntu
ubuntulinux-tools-nvidia-lowlatency-64k-6.8 (6.8.0-1046.49.1) @ noble2026-11-12ubuntu
ubuntulinux-xilinx-zynqmp (6.8.0.1023.24) @ noble2026-11-12ubuntu
ubuntulinux-tools-azure-lts-24.04 (6.8.0-1046.52) @ noble2026-11-12ubuntu
ubuntulinux-tools-azure-fips-6.8 (6.8.0-1046.52+fips1) @ noble2026-11-12ubuntu
ubuntulinux-tools-azure-edge (6.8.0-1051.57~22.04.1) @ jammy2026-11-12ubuntu
ubuntulinux-tools-oracle-edge (5.15.0.1108.114~20.04.1) @ focal2026-11-12ubuntu
ubuntulinux-virtual-hwe-20.04-edge (5.15.0.185.166) @ jammy2026-11-12ubuntu
ubuntulinux-tools-raspi-nolpae (5.15.0.1105.103) @ jammy2026-11-12ubuntu
ubuntulinux-tools-intel-iotg-edge (5.15.0.1106.112~20.04.1) @ focal2026-11-12ubuntu
ubuntulinux-tools-azure-fips-5.15 (5.15.0.1116.101) @ jammy2026-11-12ubuntu
ubuntulinux-tools-aws-edge (6.14.0-1009.9~24.04.1) @ noble2026-11-12ubuntu
ubuntulinux-tools-oem-6.14 (6.14.0-1007.7) @ noble2026-11-12ubuntu
ubuntulinux-xilinx-zynqmp-tools-5.15.0-1074 (5.15.0-1074.78) @ jammy2026-11-12ubuntu
linuxKernel @ 6.1.138 (fixes >=5.15.0)—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.

Affected Packages

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
linux-6.16.1.106-3~deb11u1 ... 6.1.137-1~deb11u1 (8 versions)
  • every version up to 6.1.140-1~deb11u1: fixed in 6.1.140-1~deb11u1
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.1.106-1 ... 6.1.99-1 (40 versions)
  • every version up to 6.1.140-1: fixed in 6.1.140-1
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
linux—
  • every version up to 6.12.29-1: fixed in 6.12.29-1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
linux—
  • every version up to 6.12.29-1: fixed in 6.12.29-1
—

Weakness Classification(1)

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

Additional Vendor Advisories

(24)

Data Freshness Timeline

(refreshed 8× in last 7d / 36× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed its CVE.org record (CNA or CISA ADP). An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). "EchelonGraph re-scored" is our own recompute of this CVE's score, not an update from a source, and is not counted in the refreshes above. Most recent first.

Showing the most recent 100 of 245 rows on record for this CVE, as 99 entries (1 repeat merged).

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 1 repeat row among the latest 100 is merged into the row it repeats. The 145 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-13 16:49 UTCEPSS rescoreEPSS 25% · 97th percentile
  2. 2026-11-12 16:32 UTCEPSS rescoreEPSS 25% · 97th percentile
  3. 2026-11-12 04:41 UTCEchelonGraph re-scored
  4. 2026-11-12 04:41 UTCVendor advisory
  5. 2026-11-12 04:40 UTCGHSA enrichmentGHSA-3x67-44wh-mrgf · GitHub severity HIGH · GitHub CVSS 7.8
  6. 2026-11-11 16:36 UTCEPSS rescoreEPSS 25% · 97th percentile
  7. 2026-11-10 16:40 UTCEPSS rescoreEPSS 25% · 97th percentile
  8. 2026-11-08 16:37 UTCEPSS rescoreEPSS 25% · 97th percentile
  9. 2026-11-07 16:36 UTCEPSS rescoreEPSS 25% · 97th percentile
  10. 2026-11-06 16:34 UTCEPSS rescoreEPSS 25% · 97th percentile
  11. 2026-11-05 16:35 UTCEPSS rescoreEPSS 25% · 97th percentile
  12. 2026-11-05 09:23 UTCEchelonGraph re-scored
  13. 2026-11-05 09:23 UTCGHSA enrichmentGHSA-3x67-44wh-mrgf · GitHub severity HIGH · GitHub CVSS 7.8
  14. 2026-11-04 16:33 UTCEPSS rescoreEPSS 25% · 97th percentile
  15. 2026-11-03 16:44 UTCEPSS rescoreEPSS 25% · 97th percentile
  16. 2026-10-31 16:31 UTCEPSS rescoreEPSS 25% · 97th percentile
  17. 2026-10-30 16:32 UTCEPSS rescoreEPSS 25% · 97th percentile
  18. 2026-10-29 16:31 UTCEPSS rescoreEPSS 25% · 97th percentile
  19. 2026-10-29 14:13 UTCEchelonGraph re-scored
  20. 2026-10-29 14:13 UTCVendor advisory
  21. 2026-10-29 14:13 UTCGHSA enrichmentGHSA-3x67-44wh-mrgf · GitHub severity HIGH · GitHub CVSS 7.8
  22. 2026-10-28 16:30 UTCEPSS rescoreEPSS 25% · 97th percentile
  23. 2026-10-27 16:30 UTCEPSS rescoreEPSS 25% · 97th percentile
  24. 2026-10-25 16:31 UTCEPSS rescoreEPSS 22% · 97th percentile
  25. 2026-10-25 16:31 UTCEchelonGraph re-scored
Show 74 more
  1. 2026-10-24 16:31 UTCEPSS rescoreEPSS 22% · 97th percentile
  2. 2026-10-23 16:30 UTCEPSS rescoreEPSS 22% · 97th percentile
  3. 2026-10-22 18:10 UTCEchelonGraph re-scored
  4. 2026-10-22 18:10 UTCVendor advisory
  5. 2026-10-22 18:09 UTCGHSA enrichmentGHSA-3x67-44wh-mrgf · GitHub severity HIGH · GitHub CVSS 7.8
  6. 2026-10-22 16:33 UTCEPSS rescoreEPSS 22% · 97th percentile
  7. 2026-10-21 16:31 UTCEPSS rescoreEPSS 22% · 97th percentile
  8. 2026-10-20 16:31 UTCEPSS rescoreEPSS 22% · 97th percentile
  9. 2026-10-19 16:30 UTCEPSS rescoreEPSS 22% · 97th percentile
  10. 2026-10-18 05:36 UTCEchelonGraph re-scored
  11. 2026-10-17 16:33 UTCEPSS rescoreEPSS 22% · 97th percentile
  12. 2026-10-16 16:38 UTCEPSS rescoreEPSS 22% · 97th percentile
  13. 2026-10-15 22:25 UTCEchelonGraph re-scored▼ 2.00
  14. 2026-10-15 22:25 UTCGHSA enrichmentGHSA-3x67-44wh-mrgf · GitHub severity HIGH · GitHub CVSS 7.8
  15. 2026-10-15 22:25 UTCNVD updateCVSS v3 → 7.8 · severity → HIGH
  16. 2026-10-15 22:03 UTCEchelonGraph re-scored
  17. 2026-10-15 22:03 UTCGHSA enrichmentGHSA-3x67-44wh-mrgf · GitHub severity HIGH · GitHub CVSS 7.8
  18. 2026-10-15 19:58 UTCEchelonGraph re-scored
  19. 2026-10-15 19:57 UTCGHSA enrichmentGHSA-3x67-44wh-mrgf · GitHub severity HIGH · GitHub CVSS 7.8
  20. 2026-10-15 16:30 UTCEPSS rescoreEPSS 21% · 97th percentile
  21. 2026-10-14 16:31 UTCEPSS rescoreEPSS 21% · 97th percentile
  22. 2026-10-14 13:54 UTCEchelonGraph re-scored
  23. 2026-10-14 13:54 UTCVendor advisory
  24. 2026-10-14 13:54 UTCGHSA enrichmentGHSA-3x67-44wh-mrgf · GitHub severity HIGH · GitHub CVSS 7.8
  25. 2026-10-13 16:32 UTCEPSS rescoreEPSS 21% · 97th percentile
  26. 2026-10-13 12:27 UTCVendor advisory
  27. 2026-10-13 12:27 UTCGHSA enrichmentGHSA-3x67-44wh-mrgf · GitHub severity HIGH · GitHub CVSS 7.8
  28. 2026-10-12 17:08 UTCEchelonGraph re-scored
  29. 2026-10-12 16:33 UTCEPSS rescoreEPSS 21% · 97th percentile
  30. 2026-10-12 11:24 UTCVendor advisory
  31. 2026-10-12 11:23 UTCGHSA enrichmentGHSA-3x67-44wh-mrgf · GitHub severity HIGH · GitHub CVSS 7.8
  32. 2026-10-11 20:41 UTCEchelonGraph re-scored
  33. 2026-10-11 18:51 UTCEchelonGraph re-scored
  34. 2026-10-11 15:28 UTCEchelonGraph re-scored
  35. 2026-10-11 13:47 UTCEPSS rescoreEPSS 21% · 97th percentile
  36. 2026-10-10 19:59 UTCEPSS rescoreEPSS 21% · 97th percentile
  37. 2026-10-09 20:06 UTCEPSS rescoreEPSS 21% · 97th percentile
  38. 2026-10-08 17:09 UTCEPSS rescoreEPSS 21% · 97th percentile
  39. 2026-10-07 23:46 UTCEPSS rescoreEPSS 21% · 97th percentile
  40. 2026-10-06 15:16 UTCEPSS rescoreEPSS 21% · 97th percentile
  41. 2026-10-05 17:42 UTCEPSS rescoreEPSS 21% · 97th percentile
  42. 2026-10-04 23:21 UTCEPSS rescoreEPSS 21% · 97th percentile
  43. 2026-10-03 14:24 UTCEPSS rescoreEPSS 21% · 97th percentile
  44. 2026-10-01 19:49 UTCEPSS rescoreEPSS 21% · 97th percentile
  45. 2026-09-30 15:02 UTCEPSS rescoreEPSS 21% · 97th percentile
  46. 2026-09-27 03:45 UTCOSV refresh
  47. 2026-09-26 15:58 UTCEPSS rescoreEPSS 21% · 97th percentile
  48. 2026-09-26 00:24 UTCEPSS rescoreEPSS 21% · 97th percentile
  49. 2026-09-24 14:02 UTCEPSS rescoreEPSS 21% · 97th percentile
  50. 2026-09-23 13:47 UTCEPSS rescoreEPSS 21% · 97th percentile
  51. 2026-09-18 19:27 UTCEPSS rescoreEPSS 21% · 97th percentile
  52. 2026-09-17 19:29 UTCEPSS rescoreEPSS 21% · 97th percentile
  53. 2026-09-16 14:07 UTCEPSS rescoreEPSS 21% · 97th percentile
  54. 2026-09-16 05:14 UTCEPSS rescoreEPSS 21% · 97th percentile
  55. 2026-09-12 15:00 UTCEPSS rescoreEPSS 21% · 97th percentile
  56. 2026-09-11 14:52 UTCEPSS rescoreEPSS 21% · 97th percentile
  57. 2026-09-11 09:35 UTCEPSS rescoreEPSS 21% · 97th percentile
  58. 2026-09-10 09:33 UTCEPSS rescoreEPSS 21% · 97th percentile
  59. 2026-09-08 21:59 UTCEPSS rescoreEPSS 21% · 97th percentile
  60. 2026-09-07 12:48 UTCOSV refresh
  61. 2026-09-06 13:46 UTCEPSS rescoreEPSS 21% · 97th percentile
  62. 2026-09-04 05:05 UTCEPSS rescoreEPSS 21% · 97th percentile
  63. 2026-09-02 14:11 UTCEPSS rescoreEPSS 21% · 97th percentile
  64. 2026-09-01 13:53 UTCEPSS rescoreEPSS 21% · 97th percentile
  65. 2026-08-30 19:16 UTCEPSS rescoreEPSS 21% · 97th percentile
  66. 2026-08-30 01:21 UTCEPSS rescoreEPSS 21% · 97th percentile
  67. 2026-08-28 21:40 UTCEPSS rescoreEPSS 21% · 97th percentile
  68. 2026-08-27 14:24 UTCEPSS rescoreEPSS 21% · 97th percentile
  69. 2026-08-26 14:45 UTCEPSS rescoreEPSS 21% · 97th percentile
  70. 2026-08-25 13:48 UTCEPSS rescoreEPSS 21% · 97th percentile
  71. 2026-08-23 00:18 UTCEPSS rescoreEPSS 21% · 97th percentile
  72. 2026-08-21 23:48 UTCEPSS rescoreEPSS 21% · 97th percentile
  73. 2026-08-20 22:54 UTCEPSS rescoreEPSS 12% · 95th percentile
  74. 2026-08-20 22:01 UTCOSV refresh

Frequently asked(5)

What is CVE-2025-37924?
CVE-2025-37924 is a high-severity vulnerability; its CVE record was published on May 20, 2025. In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix use-after-free in kerberos authentication Setting sess->user = NULL was introduced to fix the dangling pointer created by ksmbd_free_user. However, it is possible another thread could be operating on the session and make…
When was the CVE record for CVE-2025-37924 published?
The CVE record for CVE-2025-37924 was published on May 20, 2025. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of October 15, 2026; the record at its source may have been updated since.
Is CVE-2025-37924 actively exploited?
CVE-2025-37924 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 25% probability of exploitation in the next 30 days (97th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2025-37924?
CVE-2025-37924 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2025-37924?
A fix for CVE-2025-37924 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2025-37924 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2025-37924

Explore →

Is Your Infrastructure Affected by CVE-2025-37924?

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