CVE-2026-63853

HIGHPre-NVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-07-19. the CNA's CVSS baseline 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:linux, epss, ghsa
Trending — 4 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:

drm/amdgpu/vcn: set no_user_fence for VCN v4.0 enc ring

VCN encoder and decoder rings do not support 64-bit user fence writes, reject CS submissions with user fences.

(cherry picked from commit fd852c048b46f9825e904a4f3f4538fe9d8827d9)

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
3%
KEV
Not listed

Published

July 19, 2026

Last Modified

August 5, 2026

Advisory Details (3)

Auto-updated Jul 21, 2026
No patch confirmed yet.
generic

drm/amdgpu/vcn: set no_user_fence for VCN v4.0 enc ring - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/6bdd2ed6458d35c368fbe9550a4d7f342abd3a92
generic

drm/amdgpu/vcn: set no_user_fence for VCN v4.0 enc ring - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/51f694221047c84fa185be98210eb2c354ffb8c6
generic

drm/amdgpu/vcn: set no_user_fence for VCN v4.0 enc ring - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/1286b6872de0aee1feeeaa6dbac86369806de9a5

Vendor Advisories for CVE-2026-63853(2)

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

Patch Availability(6)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-tools-azure-fde-7.0 (7.0.0-1009.9) @ resolute2026-09-11ubuntu
ubuntulinux-tools-raspi-realtime-7.0 (7.0.0-1015.15) @ resolute2026-09-11ubuntu
ubuntulinux-tools-nvidia-hwe-24.04-edge (7.0.0-1016.16) @ resolute2026-09-11ubuntu
ubuntulinux-tools-gcp-edge (7.0.0-1011.11~24.04.1) @ noble2026-09-11ubuntu
ubuntulinux-tools-oracle-7.0 (7.0.0-1008.8) @ resolute2026-09-11ubuntu
ubuntulinux-tools-nvidia-hwe-26.04 (7.0.0-2016.16) @ resolute2026-09-11ubuntu

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

(3 across 3 ecosystems)
Debian:12(1)
PackageVulnerable rangeFixed inDependents
linux6.1.106-1 ... 7.2~rc7-1~exp1 (350 versions)——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
linux6.12.100-1 ... 7.2~rc7-1~exp1 (174 versions)——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux6.12.100-1 ... 7.0.9-1~bpo13+1 (140 versions)7.0.10-1—

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 16× in last 7d / 108× 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 215 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-63853?
CVE-2026-63853 is a high vulnerability published on July 19, 2026. In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu/vcn: set nouserfence for VCN v4.0 enc ring VCN encoder and decoder rings do not support 64-bit user fence writes, reject CS submissions with user fences. (cherry picked from commit…
When was CVE-2026-63853 disclosed?
CVE-2026-63853 was first published in the National Vulnerability Database on July 19, 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-2026-63853 actively exploited?
CVE-2026-63853 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 97.0% of all scored CVEs.
What is the CVSS score of CVE-2026-63853?
CVE-2026-63853 has a CVSS v4.0 base score of 7.8 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-63853?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-63853, 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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