CVE-2026-63849

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 v5.0.1 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 e16be95a2c3ee712b142cb27d2dca0b461181359)

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

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 v5.0.1 enc ring - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/8f4954722eab88e10c4ea0c0d3b1269c31421d3a
generic

drm/amdgpu/vcn: set no_user_fence for VCN v5.0.1 enc ring - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/5a4bffd67e94944ed3db26a959346cfb7fabaecd
generic

drm/amdgpu/vcn: set no_user_fence for VCN v5.0.1 enc ring - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/081ef0e46c9cdd26c0db0ef721470393d36b6655

Vendor Advisories for CVE-2026-63849(1)

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

Patch Availability(5)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-tools-oracle-7.0 (7.0.0-1008.8) @ resolute2026-08-30ubuntu
ubuntulinux-tools-nvidia-hwe-26.04 (7.0.0-2016.16) @ resolute2026-08-30ubuntu
ubuntulinux-tools-raspi-realtime-7.0 (7.0.0-1015.15) @ resolute2026-08-30ubuntu
ubuntulinux-tools-nvidia-hwe-24.04-edge (7.0.0-1016.16) @ resolute2026-08-30ubuntu
ubuntulinux-tools-azure-fde-7.0 (7.0.0-1009.9) @ resolute2026-08-30ubuntu

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 ... 7.0.9-1~bpo13+1 (137 versions)7.0.10-1—

All Vendor Advisories

(5)

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 32× in last 7d / 174× 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 222 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-63849?
CVE-2026-63849 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 v5.0.1 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-2026-63849 disclosed?
CVE-2026-63849 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-2026-63849 actively exploited?
CVE-2026-63849 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 96.3% of all scored CVEs.
What is the CVSS score of CVE-2026-63849?
CVE-2026-63849 has a CVSS v4.0 base score of 7.8 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-63849?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-63849, 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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