CVE-2026-46115

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-05-28. the CNA's CVSS baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:linux, epss, ghsa
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.8Exploit: None knownExposed: 0

A fix is available — apply it.

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

block: add pgmap check to biovec_phys_mergeable

biovec_phys_mergeable() is used by the request merge, DMA mapping, and integrity merge paths to decide if two physically contiguous bvec segments can be coalesced into one. It currently has no check for whether the segments belong to different dev_pagemaps.

When zone device memory is registered in multiple chunks, each chunk gets its own dev_pagemap. A single bio can legitimately contain bvecs from different pgmaps -- iov_iter_extract_bvecs() breaks at pgmap boundaries but the outer loop in bio_iov_iter_get_pages() continues filling the same bio. If such bvecs are physically contiguous, biovec_phys_mergeable() will coalesce them, making it impossible to recover the correct pgmap for the merged segment via page_pgmap().

Add a zone_device_pages_have_same_pgmap() check to prevent merging bvec segments that span different pgmaps.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
49(Track)
EG Risk 49/100SSVC: 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
Severity98% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
40%
KEV
Not listed

Published

May 28, 2026

Last Modified

August 5, 2026

Advisory Details (5)

Auto-updated Sep 2, 2026
No patch confirmed yet.
generic

block: add pgmap check to biovec_phys_mergeable - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/13920e4b7b784b40cf4519ff1f0f3e513476a499
generic

block: add pgmap check to biovec_phys_mergeable - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/f632dab4b841554cd6416058c61886d7db176581
generic

block: add pgmap check to biovec_phys_mergeable - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/f17d521075325b8afc42d1baa1c28a5e9aca111f
generic

block: add pgmap check to biovec_phys_mergeable - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/a7f3aa8c9df3905fe820ae36b67ba56b81587574
generic

block: add pgmap check to biovec_phys_mergeable - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/3d2ecbd444b01d6500671d1a582b7393943cf539

Vendor Advisories for CVE-2026-46115(2)

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

Patch Availability(26)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-tools-raspi-6.8 (6.8.0-1060.64) @ noble2026-08-25ubuntu
ubuntulinux-virtual-hwe-26.04-edge (7.0.0-27.27) @ resolute2026-08-25ubuntu
ubuntulinux-virtual-hwe-24.04-edge (6.17.0-40.40) @ questing2026-08-25ubuntu
ubuntulinux-tools-oem-6.17 (6.17.0-1028.28) @ noble2026-08-25ubuntu
ubuntulinux-virtual-6.8 (6.8.0-134.134) @ noble2026-08-25ubuntu
ubuntulinux-tools-nvidia-lowlatency-64k-6.8 (6.8.0-1058.61.1) @ noble2026-08-25ubuntu
ubuntulinux-tools-lowlatency-hwe-20.04-edge (6.8.0-134.134.1) @ noble2026-08-25ubuntu
ubuntulinux-tools-nvidia-tegra-rt-6.8 (6.8.0-1029.30) @ noble2026-08-25ubuntu
ubuntulinux-xilinx-zynqmp (6.8.0.1032.33) @ noble2026-08-25ubuntu
ubuntulinux-tools-nvidia-hwe-24.04-edge (7.0.0-1013.13) @ resolute2026-08-25ubuntu
ubuntulinux-tools-nvidia-hwe-24.04 (6.17.0-1026.26) @ noble2026-08-25ubuntu
ubuntulinux-tools-raspi-realtime-6.8 (6.8.0-2049.50) @ noble2026-08-25ubuntu
ubuntulinux-tools-realtime-hwe-24.04-edge (6.17.0-1017.19) @ questing2026-08-25ubuntu
ubuntulinux-tools-fips-6.8 (6.8.0-134.134+fips1) @ noble2026-08-25ubuntu
ubuntulinux-virtual-hwe-24.04 (6.17.0-40.40~24.04.1) @ noble2026-08-25ubuntu
ubuntulinux-tools-raspi-6.17 (6.17.0-1021.21) @ questing2026-08-25ubuntu
ubuntulinux-virtual-hwe-24.04-edge (7.0.0-28.28~24.04.1) @ noble2026-08-25ubuntu
ubuntulinux-tools-azure-fde-7.0 (7.0.0-1009.9) @ resolute2026-08-25ubuntu
ubuntulinux-tools-azure-6.17 (6.17.0-1021.21~24.04.1) @ noble2026-08-25ubuntu
ubuntulinux-tools-azure-fde-6.17 (6.17.0-1018.18~24.04.1) @ noble2026-08-25ubuntu
ubuntulinux-tools-azure-lts-24.04 (6.8.0-1063.71) @ noble2026-08-25ubuntu
ubuntulinux-tools-azure-fde-lts-24.04 (6.8.0-1062.69) @ noble2026-08-25ubuntu
ubuntulinux-tools-azure-fde-6.8 (6.8.0-1062.69~22.04.1) @ jammy2026-08-25ubuntu
ubuntulinux-virtual-hwe-22.04-edge (6.8.0-136.136~22.04.1) @ jammy2026-08-25ubuntu
ubuntulinux-tools-oem-7.0 (7.0.0-1008.8) @ resolute2026-08-25ubuntu
ubuntulinux-tools-raspi-realtime-7.0 (7.0.0-1014.14) @ resolute2026-08-25ubuntu

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

(2 across 2 ecosystems)
Debian:13(1)
PackageVulnerable rangeFixed inDependents
linux6.12.38-1 ... 6.12.88-1~bpo12+1 (21 versions)6.12.88-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux6.12.100-1 ... 7.0.7-1~bpo13+1 (133 versions)7.0.7-1—

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 5× in last 7d / 165× 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 516 total refreshes for this CVE.

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

Related CVEs(same vendor)

Frequently asked(5)

What is CVE-2026-46115?
CVE-2026-46115 is a critical vulnerability published on May 28, 2026. In the Linux kernel, the following vulnerability has been resolved: block: add pgmap check to biovecphysmergeable biovecphysmergeable() is used by the request merge, DMA mapping, and integrity merge paths to decide if two physically contiguous bvec segments can be coalesced into one. It currently…
When was CVE-2026-46115 disclosed?
CVE-2026-46115 was first published in the National Vulnerability Database on May 28, 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-2026-46115 actively exploited?
CVE-2026-46115 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 59.6% of all scored CVEs.
What is the CVSS score of CVE-2026-46115?
CVE-2026-46115 has a CVSS v4.0 base score of 9.8 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-46115?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-46115, 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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