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Linux Kernel CVE-2026-68236

| EUVDEUVD-2026-55337 HIGH
2026-08-10 Linux GHSA-mrj4-jj6w-2fxx
Amd Information Disclosure Linux Suse
7.8
CVSS 3.1 · Vendor: Linux
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Severity by source

Vendor (Linux) PRIMARY
7.8 HIGH
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
vuln.today AI
7.0 HIGH

AC:H reflects the requirement for a specific two-condition error sequence (skip_modeset followed by color management failure); PR:L because any user with DRM device access can trigger display ioctls.

3.1 AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
4.0 AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
SUSE
5.5 MEDIUM
AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Red Hat
7.0 HIGH
qualitative

Primary rating from Vendor (Linux).

CVSS VectorVendor: Linux

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

Lifecycle Timeline

5
Analysis Generated
Aug 14, 2026 - 03:32 vuln.today
CVSS changed
Aug 13, 2026 - 23:37 NVD
7.8 (HIGH)
Patch available
Aug 10, 2026 - 14:18 EUVD
CVE Published
Aug 10, 2026 - 12:01 cve.org
HIGH 7.8
CVE Published
Aug 10, 2026 - 12:01 cve.org
UNKNOWN (no severity yet)

DescriptionCVE.org

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

drm/amd/display: set new_stream to NULL after release

In dm_update_crtc_state(), the skip_modeset path releases new_stream via dc_stream_release() but does not set the pointer to NULL.

If a later error (e.g., color management failure) triggers the fail label, the error path calls dc_stream_release() again on the same dangling pointer, causing a double release and potential use-after-free.

Fix this by setting new_stream to NULL after the initial release.

(cherry picked from commit 99f3af19073b3ddbfd96e789124cce12c4277b28)

AnalysisAI

Double-free and use-after-free conditions in the Linux kernel's drm/amd/display subsystem expose systems with AMD GPU hardware to potential privilege escalation or kernel crash. The flaw resides in dm_update_crtc_state(), where the skip_modeset path releases a display stream reference without nullifying the pointer, leaving it dangling for a second release if a subsequent error - such as a color management failure - triggers the fail label. …

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Hypothetical attack flow derived from CVE metadata

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Vulnerability AssessmentAI

Exploitation The vulnerability requires local user-level access (PR:L per CVSS) to a system running the Linux amdgpu kernel driver with Display Core (DC) enabled - the default mode on AMD GPU systems with display output. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 7.8 (AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H) reflects a locally exploitable kernel memory corruption with high impact across confidentiality, integrity, and availability - consistent with the double-free/UAF class, which can be leveraged for kernel heap manipulation and privilege escalation. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation The primary fix is to upgrade to a patched kernel release: Linux 6.6.148, 6.12.101, 6.18.42, 7.1.6, or 7.2-rc4, depending on the distribution's stable branch. … Detailed patch versions, workarounds, and compensating controls in full report.
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Recommended ActionAI

Within 24 hours, inventory all Linux systems with AMD GPU hardware and document current kernel versions in use. …

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Vendor StatusVendor

SUSE

Severity: Moderate
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-2026-68236 vulnerability details – vuln.today
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