CVE-2026-64379

HIGHPre-NVD 7.17.1—
EchelonGraph scoreMEDIUM confidence

Score 7.1 from GitHub Security Advisory (severity: HIGH) published 2026-07-25. A secondary CVSS source baseline 7.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
7.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 7.1Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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

smb: client: mask server-provided mode to 07777 in modefromsid

When modefromsid is active, parse_dacl() applies the server-provided sub_auth[2] value from the NFS mode SID to cf_mode without masking to

  • Apply the correct masking, same as in the read path.

CVSS v3
7.1
EG Score
7.1HIGHmedium confidence
EG Risk
37
EG Risk 37/100CISA SSVC

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
Severity71% × 45%
Exploitation0% × 40%
Automatability30% × 15%
CISA SSVC: Track at low or medium mission impact; Track or Attend at high (mission-essential systems).
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
0.3%
EPSS %ILE
21st
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track or 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 (no KEV listing, exploit record or EPSS ≥ 50%) · Automatable unknown (not published for this CVE) · Technical impact partial (CVSS below 9.0). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

July 25, 2026

Last Modified

September 8, 2026

Advisory Details (8)

Auto-updated Jul 27, 2026
Patch available.
generic

smb: client: mask server-provided mode to 07777 in modefromsid - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/f80add1bfb3425100a325b14f19648e75669a954
generic

smb: client: mask server-provided mode to 07777 in modefromsid - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/f511807feee7cb29b61bdfa86472c7e9e2e5df94
generic

smb: client: mask server-provided mode to 07777 in modefromsid - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/ee2216dbdf0c677e89bb43e03247dba590ed00ef
generic

smb: client: mask server-provided mode to 07777 in modefromsid - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/e3d9c7160d483fc8f9e225aafad8ecbbc43f3151
generic

smb: client: mask server-provided mode to 07777 in modefromsid - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/c6c484a7d5bff6b929a86d7ed5130f29834c6a0d
generic

smb: client: mask server-provided mode to 07777 in modefromsid - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/b84e002e0df26bbc6cbd3ca01b8212601fe0ae7d
generic

smb: client: mask server-provided mode to 07777 in modefromsid - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/5f6f2241034f189c69d4d0b5f8fe24a0c25b0c14
generic

smb: client: mask server-provided mode to 07777 in modefromsid - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/08c600b7e1818539ba5efee4cdb06215c245ca78

Vendor Advisories for CVE-2026-64379(6)

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

Patch Availability(21)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntulinux-tools-raspi-realtime-7.0 (7.0.0-1019.19) @ resolute2026-10-07ubuntu
ubuntulinux-tools-nvidia-hwe-26.04 (7.0.0-2018.18) @ resolute2026-10-07ubuntu
ubuntulinux-tools-nvidia-hwe-24.04-edge (7.0.0-1018.18) @ resolute2026-10-07ubuntu
ubuntulinux-tools-gcp-edge (5.15.0.1118.128~20.04.1) @ focal2026-10-07ubuntu
ubuntulinux-tools-azure-fde-lts-22.04 (5.15.0.1122.131) @ jammy2026-10-07ubuntu
ubuntulinux-tools-gcp-lts-22.04 (5.15.0.1118.115) @ jammy2026-10-07ubuntu
ubuntulinux-tools-oracle-edge (5.15.0.1114.120~20.04.1) @ focal2026-10-07ubuntu
ubuntulinux-virtual-hwe-20.04-edge (5.15.0.198.208~20.04.1) @ focal2026-10-07ubuntu
ubuntulinux-tools-nvidia-tegra-rt-6.8 (6.8.0-1036.39) @ noble2026-10-07ubuntu
ubuntulinux-tools-oracle-7.0 (7.0.0-1011.11) @ resolute2026-10-07ubuntu
ubuntulinux-tools-azure-edge (7.0.0-1014.14~24.04.1) @ noble2026-10-07ubuntu
ubuntulinux-tools-oracle-edge (7.0.0-1011.11~24.04.1) @ noble2026-10-07ubuntu
ubuntulinux-tools-ibm-7.0 (7.0.0-1013.13) @ resolute2026-10-07ubuntu
ubuntulinux-tools-oem-7.0 (7.0.0-1013.13) @ resolute2026-10-07ubuntu
ubuntulinux-virtual-hwe-26.04-edge (7.0.0-31.31) @ resolute2026-10-07ubuntu
ubuntulinux-tools-gcp-edge (7.0.0-1011.11~24.04.1) @ noble2026-10-07ubuntu
ubuntulinux-tools-nvidia-hwe-24.04-edge (7.0.0-1018.18~24.04.1) @ noble2026-10-07ubuntu
redhatkernel-0:4.18.0-553.157.1.el8_102026-08-20redhat
redhatkernel-0:6.12.0-211.49.1.el10_22026-08-20redhat
redhatkernel-0:5.14.0-687.41.1.el9_82026-08-20redhat
redhatkernel-rt-0:4.18.0-553.157.1.rt7.498.el8_102026-08-20redhat

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

(6 across 4 ecosystems)
Debian:11(2)
PackageVulnerable rangeFix by version rangeDependents
linux5.10.103-1 ... 5.10.92-2 (55 versions)
  • every version up to 5.10.262-1: fixed in 5.10.262-1
—
linux-6.16.1.106-3~deb11u1 ... 6.1.177-1~deb11u1 (22 versions)
  • every version up to 6.1.180-1~deb11u1: fixed in 6.1.180-1~deb11u1
—
Debian:12(2)
PackageVulnerable rangeFix by version rangeDependents
linux6.1.106-1 ... 6.1.99-1 (55 versions)
  • every version up to 6.1.180-1: fixed in 6.1.180-1
—
linux-6.12—
  • every version up to 6.12.100-1~deb12u1: fixed in 6.12.100-1~deb12u1
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.38-1 ... 6.12.95-1~bpo12+1 (30 versions)
  • every version up to 6.12.96-1: fixed in 6.12.96-1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.100-1 ... 7.1~rc7-1~exp1 (159 versions)
  • every version up to 7.1.4-1: fixed in 7.1.4-1
—

Additional Vendor Advisories

(17)

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 13× in last 7d / 92× 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 319 total refreshes for this CVE.

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

Related CVEs(same vendor)

Frequently asked(5)

What is CVE-2026-64379?
CVE-2026-64379 is a high vulnerability published on July 25, 2026. In the Linux kernel, the following vulnerability has been resolved: smb: client: mask server-provided mode to 07777 in modefromsid When modefromsid is active, parse_dacl() applies the server-provided subauth[2] value from the NFS mode SID to cfmode without masking to 07777. Apply the correct…
When was CVE-2026-64379 disclosed?
CVE-2026-64379 was first published on July 25, 2026, with the most recent update on September 8, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-64379 actively exploited?
CVE-2026-64379 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (21st percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-64379?
CVE-2026-64379 has a CVSS base score of 7.1 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-64379?
A fix for CVE-2026-64379 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-64379 are linked in the Vendor Advisories panel on this page.

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