CVE-2026-63849
drm/amdgpu/vcn: set no_user_fence for VCN v5.0.1 enc ring
Description
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)
INFO
Published Date :
July 19, 2026, 3:16 p.m.
Last Modified :
July 19, 2026, 3:16 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Affected Products
The following products are affected by CVE-2026-63849
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
Solution
- Apply the patch for VCN encoder/decoder user fence writes.
- Ensure user fences are rejected for CS submissions.
- Update the Linux kernel to the patched version.
- Verify VCN ring functionality after the update.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-63849.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-63849 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-63849
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-63849 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-63849 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jul. 19, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '346492f30ce3581bf5324c4ae417eab8537dc998', 'lessThan': '081ef0e46c9cdd26c0db0ef721470393d36b6655', 'versionType': 'git'}, {'status': 'affected', 'version': '346492f30ce3581bf5324c4ae417eab8537dc998', 'lessThan': '5a4bffd67e94944ed3db26a959346cfb7fabaecd', 'versionType': 'git'}, {'status': 'affected', 'version': '346492f30ce3581bf5324c4ae417eab8537dc998', 'lessThan': '8f4954722eab88e10c4ea0c0d3b1269c31421d3a', 'versionType': 'git'}], 'programFiles': ['drivers/gpu/drm/amd/amdgpu/vcn_v5_0_1.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '6.14'}, {'status': 'unaffected', 'version': '0', 'lessThan': '6.14', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.18.33', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.0.10', 'versionType': 'semver', 'lessThanOrEqual': '7.0.*'}, {'status': 'unaffected', 'version': '7.1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/gpu/drm/amd/amdgpu/vcn_v5_0_1.c'], 'defaultStatus': 'affected'}] Added Description 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) Added Reference https://git.kernel.org/stable/c/081ef0e46c9cdd26c0db0ef721470393d36b6655 Added Reference https://git.kernel.org/stable/c/5a4bffd67e94944ed3db26a959346cfb7fabaecd Added Reference https://git.kernel.org/stable/c/8f4954722eab88e10c4ea0c0d3b1269c31421d3a