CVE-2026-46309

HIGHPre-NVD 7.07.0—
EchelonGraph scoreHIGH confidence

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

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
7.0
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.0Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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
7.0(high)
EPSS
2.1%
KEV
Not listed

Published

June 8, 2026

Last Modified

June 30, 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
redhat Patch Available

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.

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 21× in last 7d / 62× 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.

  1. 2026-07-06 16:27 UTCEPSS rescore
  2. 2026-07-05 17:30 UTCEG score recompute
  3. 2026-07-05 17:30 UTCGHSA enrichment
  4. 2026-07-05 03:30 UTCEG score recompute
  5. 2026-07-05 03:30 UTCGHSA enrichment
  6. 2026-07-05 02:30 UTCEPSS rescore
  7. 2026-07-04 14:57 UTCEG score recompute
  8. 2026-07-04 14:57 UTCGHSA enrichment
  9. 2026-07-04 06:31 UTCEPSS rescore
  10. 2026-07-03 21:49 UTCEG score recompute
  11. 2026-07-03 21:49 UTCGHSA enrichment
  12. 2026-07-03 09:23 UTCEG score recompute
  13. 2026-07-03 09:23 UTCGHSA enrichment
  14. 2026-07-02 19:58 UTCEG score recompute
  15. 2026-07-02 19:58 UTCGHSA enrichment
  16. 2026-07-02 07:37 UTCEG score recompute
  17. 2026-07-02 07:37 UTCGHSA enrichment
  18. 2026-07-01 19:18 UTCEG score recompute▲ 7.00
  19. 2026-07-01 19:18 UTCGHSA enrichment
  20. 2026-07-01 15:07 UTCEPSS rescore
  21. 2026-06-30 23:22 UTCEPSS rescore
  22. 2026-06-30 04:33 UTCNVD updateCVSS v3 → 7 · severity → HIGH
  23. 2026-06-29 14:06 UTCEPSS rescore
  24. 2026-06-29 14:06 UTCEPSS rescore
  25. 2026-06-28 22:29 UTCGHSA enrichment
Show 37 more
  1. 2026-06-28 14:07 UTCEPSS rescore
  2. 2026-06-28 04:56 UTCEPSS rescore
  3. 2026-06-28 04:56 UTCEPSS rescore
  4. 2026-06-27 03:08 UTCEPSS rescore
  5. 2026-06-26 01:40 UTCGHSA enrichment
  6. 2026-06-25 13:49 UTCEPSS rescore
  7. 2026-06-24 14:05 UTCEPSS rescore
  8. 2026-06-23 21:33 UTCEPSS rescore
  9. 2026-06-23 21:33 UTCEPSS rescore
  10. 2026-06-23 04:51 UTCGHSA enrichment
  11. 2026-06-22 14:25 UTCEPSS rescore
  12. 2026-06-22 14:25 UTCEPSS rescore
  13. 2026-06-21 14:56 UTCEPSS rescore
  14. 2026-06-21 14:56 UTCEPSS rescore
  15. 2026-06-21 01:59 UTCEPSS rescore
  16. 2026-06-21 01:59 UTCEPSS rescore
  17. 2026-06-20 07:57 UTCGHSA enrichment
  18. 2026-06-19 19:26 UTCEPSS rescore
  19. 2026-06-19 19:26 UTCEPSS rescore
  20. 2026-06-18 17:52 UTCEPSS rescore
  21. 2026-06-18 17:52 UTCEPSS rescore
  22. 2026-06-17 17:53 UTCEPSS rescore
  23. 2026-06-17 07:27 UTCGHSA enrichment
  24. 2026-06-16 17:52 UTCEPSS rescore
  25. 2026-06-15 17:49 UTCEPSS rescore
  26. 2026-06-14 23:33 UTCMITRE cvelistV5
  27. 2026-06-14 10:35 UTCGHSA enrichment
  28. 2026-06-13 23:00 UTCEPSS rescore
  29. 2026-06-12 23:12 UTCEPSS rescore
  30. 2026-06-12 23:12 UTCEPSS rescore
  31. 2026-06-11 14:00 UTCEPSS rescore
  32. 2026-06-11 13:46 UTCEG score recompute
  33. 2026-06-11 13:46 UTCGHSA enrichment
  34. 2026-06-10 22:18 UTCEPSS rescore
  35. 2026-06-10 13:22 UTCEPSS rescore
  36. 2026-06-10 13:22 UTCEPSS rescore
  37. 2026-06-08 16:57 UTCEG score recompute

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 in the National Vulnerability Database on June 8, 2026, with the most recent update on June 30, 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 2.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
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?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-46309, 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

Explore the affected products and dependency analysis for CVE-2026-46309

Explore →

Is Your Infrastructure Affected by CVE-2026-46309?

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

Start Free Scan →Browse All CVEs