CVE-2026-46309

HIGHNVD 7.07.0—
EchelonGraph scoreMEDIUM confidence

Score 7.0 from GitHub Security Advisory (severity: HIGH) published 2026-06-08. NVD baseline CVSS 7.0; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
7.0EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 7.0Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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

drm/xe/uapi: Reject coh_none PAT index for CPU cached memory in madvise

Add validation in xe_vm_madvise_ioctl() to reject PAT indices with XE_COH_NONE coherency mode when applied to CPU cached memory.

Using coh_none with CPU cached buffers is a security issue. When the kernel clears pages before reallocation, the clear operation stays in CPU cache (dirty). GPU with coh_none can bypass CPU caches and read stale sensitive data directly from DRAM, potentially leaking data from previously freed pages of other processes.

This aligns with the existing validation in vm_bind path (xe_vm_bind_ioctl_validate_bo).

v2(Matthew brost)

  • Add fixes
  • Move one debug print to better place

v3(Matthew Auld)

  • Should be drm/xe/uapi
  • More Cc

v4(Shuicheng Lin)

  • Fix kmem leak issues by the way

v5

  • Remove kmem leak because it has been merged by another patch

v6

  • Remove the fix which is not related to current fix

v7

  • No change

v8

  • Rebase

v9

  • Limit the restrictions to iGPU

v10

  • No change

(cherry picked from commit 016ccdb674b8c899940b3944952c96a6a490d10a)

CVSS v3
7.0
EG Score
7.0HIGHmedium confidence
EG Risk
36
EG Risk 36/100

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
Severity70% × 45%
Exploitation0% × 40%
Automatability30% × 15%
EPSS PROB
0.2%
EPSS %ILE
6th
KEV
Not listed

Published

June 8, 2026

Last Modified

July 23, 2026

Advisory Details (6)

Auto-updated Jul 2, 2026
Patch available. Sources: redhat.
redhat

Affected: Red Hat Enterprise Linux 10",

https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-46309.json
redhat

2486468 – (CVE-2026-46309) CVE-2026-46309 kernel: drm/xe/uapi: Reject coh_none PAT index for CPU cached memory in madvise

https://bugzilla.redhat.com/show_bug.cgi?id=2486468
redhatMentions a patch (unverified)

cve-details

https://access.redhat.com/security/cve/CVE-2026-46309
generic

drm/xe/uapi: Reject coh_none PAT index for CPU cached memory in madvise - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/fea04cf6f2345bc50f15b6638906c35962b89424
generic

drm/xe/uapi: Reject coh_none PAT index for CPU cached memory in madvise - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/87f9b1528e1ffc1da3615d552c9a06aba5e20b00
generic

drm/xe/uapi: Reject coh_none PAT index for CPU cached memory in madvise - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/4e5591c2fc1b30f4ea5e2eab4c3a695acc404e39

Vendor Advisories for CVE-2026-46309(1)

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

Patch Availability(10)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntulinux-tools-azure-fde-7.0 (7.0.0-1009.9) @ resolute2026-09-14ubuntu
ubuntulinux-tools-raspi-realtime-7.0 (7.0.0-1015.15) @ resolute2026-09-14ubuntu
ubuntulinux-tools-gcp-edge (7.0.0-1011.11~24.04.1) @ noble2026-09-14ubuntu
ubuntulinux-virtual-hwe-24.04-edge (7.0.0-28.28~24.04.1) @ noble2026-09-14ubuntu
ubuntulinux-tools-nvidia-hwe-24.04-edge (7.0.0-1016.16) @ resolute2026-09-14ubuntu
ubuntulinux-tools-nvidia-hwe-26.04 (7.0.0-2016.16) @ resolute2026-09-14ubuntu
ubuntulinux-tools-oracle-7.0 (7.0.0-1008.8) @ resolute2026-09-14ubuntu
ubuntulinux-virtual-hwe-26.04-edge (7.0.0-28.28) @ resolute2026-09-14ubuntu
ubuntulinux-tools-oem-7.0 (7.0.0-1009.9) @ resolute2026-09-14ubuntu
linuxKernel @ 6.18.32 (fixes >=6.18.0)—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

(1 across 1 ecosystem)
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.100-1 ... 7.0.9-1~bpo13+1 (139 versions)
  • every version up to 7.0.9-1: fixed in 7.0.9-1
—

Weakness Classification(2)

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

All Vendor Advisories

(9)

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 8× in last 7d / 25× 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 257 total refreshes for this CVE.

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

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-46309?
CVE-2026-46309 is a high vulnerability published on June 8, 2026. In the Linux kernel, the following vulnerability has been resolved: drm/xe/uapi: Reject coh_none PAT index for CPU cached memory in madvise Add validation in xevmmadvise_ioctl() to reject PAT indices with XECOHNONE coherency mode when applied to CPU cached memory. Using coh_none with CPU cached…
When was CVE-2026-46309 disclosed?
CVE-2026-46309 was first published on June 8, 2026, with the most recent update on July 23, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-46309 actively exploited?
CVE-2026-46309 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (6th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-46309?
CVE-2026-46309 has a CVSS v3 base score of 7.0 (NVD).
How do I remediate CVE-2026-46309?
A fix for CVE-2026-46309 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-46309 are linked in the Vendor Advisories panel on this page.

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