CVE-2026-46100

HIGHPre-NVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-05-27. the CNA's CVSS baseline 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:linux, epss, ghsa
Trending — 5 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: 0%CVSS: 7.8Exploit: None knownExposed: 0

A fix is available — apply it.

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

fs: afs: revert mmap_prepare() change

Partially reverts commit 9d5403b1036c ("fs: convert most other generic_file_*mmap() users to .mmap_prepare()").

This is because the .mmap invocation establishes a refcount, but .mmap_prepare is called at a point where a merge or an allocation failure might happen after the call, which would leak the refcount increment.

Functionality is being added to permit the use of .mmap_prepare in this case, but in the interim, we need to fix this.

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%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
4%
KEV
Not listed

Published

May 27, 2026

Last Modified

August 5, 2026

Advisory Details (3)

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

fs: afs: revert mmap_prepare() change - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/fbfc6578eaca12daa0c09df1e9ba7f2c657b49da
generic

fs: afs: revert mmap_prepare() change - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/f51f85c044809fbd39ac8ae07ac99bc43ce32bd5
generic

fs: afs: revert mmap_prepare() change - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/48c7a0eaeea41da17d1d84d2d7a4c40be122b246

Vendor Advisories for CVE-2026-46100(1)

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

Patch Availability(7)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-virtual-hwe-26.04-edge (7.0.0-27.27) @ resolute2026-09-14ubuntu
ubuntulinux-tools-oem-7.0 (7.0.0-1008.8) @ resolute2026-09-14ubuntu
ubuntulinux-tools-raspi-realtime-7.0 (7.0.0-1014.14) @ resolute2026-09-14ubuntu
ubuntulinux-tools-nvidia-hwe-24.04-edge (7.0.0-1013.13) @ resolute2026-09-14ubuntu
ubuntulinux-virtual-hwe-24.04-edge (7.0.0-28.28~24.04.1) @ noble2026-09-14ubuntu
ubuntulinux-tools-azure-fde-7.0 (7.0.0-1009.9) @ resolute2026-09-14ubuntu
linuxKernel @ 6.18.27—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

(1 across 1 ecosystem)
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux6.12.100-1 ... 7.0.4-1~bpo13+1 (134 versions)7.0.4-1—

All Vendor Advisories

(6)

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 9× in last 7d / 40× 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 268 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-46100?
CVE-2026-46100 is a high vulnerability published on May 27, 2026. In the Linux kernel, the following vulnerability has been resolved: fs: afs: revert mmap_prepare() change Partially reverts commit 9d5403b1036c ("fs: convert most other genericfile*mmap() users to .mmap_prepare()"). This is because the .mmap invocation establishes a refcount, but .mmap_prepare is…
When was CVE-2026-46100 disclosed?
CVE-2026-46100 was first published in the National Vulnerability Database on May 27, 2026, 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-2026-46100 actively exploited?
CVE-2026-46100 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 96.2% of all scored CVEs.
What is the CVSS score of CVE-2026-46100?
CVE-2026-46100 has a CVSS v4.0 base score of 7.8 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-46100?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-46100, 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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