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Amd CVE-2026-64219

| EUVDEUVD-2026-48627 HIGH
Uncontrolled Recursion (CWE-674)
2026-07-24 Linux GHSA-gjfp-5cfr-xp55
Amd Buffer Overflow Linux
7.0
CVSS 3.1 · Vendor: Linux
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Severity by source

Vendor (Linux) PRIMARY
7.0 HIGH
AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
SUSE
HIGH
qualitative
Red Hat
7.0 HIGH
qualitative

Primary rating from Vendor (Linux).

CVSS VectorVendor: Linux

Attack Vector
Local
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

5
Analysis Generated
Jul 27, 2026 - 05:23 vuln.today
CVSS changed
Jul 27, 2026 - 05:22 NVD
7.0 (HIGH)
Patch available
Jul 24, 2026 - 17:48 EUVD
CVE Published
Jul 24, 2026 - 15:23 cve.org
UNKNOWN (no severity yet)
CVE Published
Jul 24, 2026 - 15:23 cve.org
HIGH 7.0

DescriptionCVE.org

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

drm/amd/display: Validate payload length and link_index in dc_process_dmub_aux_transfer_async

[Why&How] dc_process_dmub_aux_transfer_async() copies payload->length bytes into a 16-byte stack buffer (dpaux.data[16]) guarded only by an ASSERT(), which is a no-op in release builds. If a caller ever passes length > 16 this results in a stack buffer overflow via memcpy.

Additionally, link_index is used to dereference dc->links[] without bounds checking against dc->link_count, risking an out-of-bounds access.

Replace the ASSERT with a hard runtime check that returns false when payload->length exceeds the destination buffer size, and add a bounds check for link_index before it is used.

(cherry picked from commit ba4caa9fecdf7a38f98c878ad05a8a64148b6881)

AnalysisAI

A stack buffer overflow in the AMD display driver (dc_process_dmub_aux_transfer_async) within the Linux kernel allows a local authenticated attacker with low privileges to potentially execute arbitrary code or crash the system. The flaw arises from missing bounds checks on payload length and link_index, impacting all kernels before the patched versions. While no active exploitation or public proof-of-concept is reported, the issue affects a wide range of systems with AMD GPUs.

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Vendor StatusVendor

SUSE

Severity: Important
Product Status
SUSE Linux Enterprise Desktop 15 SP7 Affected
SUSE Linux Enterprise Desktop 15 SP7 Affected
SUSE Linux Enterprise High Availability Extension 15 SP7 Affected
SUSE Linux Enterprise High Availability Extension 15 SP7 Affected
SUSE Linux Enterprise High Availability Extension 16.0 Affected

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CVE-2026-64219 vulnerability details – vuln.today
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