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Linux Kernel CVE-2026-53329

| EUVDEUVD-2026-40963 HIGH
Uncontrolled Recursion (CWE-674)
2026-07-01 Linux GHSA-j7g7-x525-gxgj
Linux Amd Buffer Overflow Red Hat Suse
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
vuln.today AI
7.0 HIGH

Local access to the amdgpu DRM device and a low-priv account (PR:L, AV:L); triggering a 32-bit multiply overflow is impractical (AC:H); kernel heap corruption yields full C/I/A impact.

3.1 AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
4.0 AV:L/AC:H/AT:N/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

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 18, 2026 - 08:22 vuln.today
CVSS changed
Jul 18, 2026 - 08:22 NVD
7.0 (HIGH)
Patch available
Jul 01, 2026 - 15:16 EUVD
CVE Published
Jul 01, 2026 - 13:32 cve.org
UNKNOWN (no severity yet)
CVE Published
Jul 01, 2026 - 13:32 cve.org
HIGH 7.0

DescriptionCVE.org

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

drm/amd/display: Use krealloc_array() in dal_vector_reserve()

[Why & How] dal_vector_reserve() computes the allocation size as "capacity * vector->struct_size" using uint32_t arithmetic, which can silently wrap to a small value on overflow. This would cause krealloc to return a smaller buffer than expected, leading to heap overflows on subsequent vector appends.

Replace krealloc() with krealloc_array() which performs an internal overflow check and returns NULL on wrap, preventing the issue.

(cherry picked from commit 37668568641ccc4cc1dbca4923d0a16609dd5707)

AnalysisAI

Heap overflow in the Linux kernel's AMD GPU display driver (drm/amd/display) arises because dal_vector_reserve() computes its allocation size as "capacity * struct_size" in 32-bit arithmetic, which can silently wrap to a small value and cause krealloc() to return an undersized buffer. A local, low-privileged user with access to the DRM/amdgpu device can trigger out-of-bounds heap writes on subsequent vector appends, potentially corrupting kernel memory. There is no public exploit identified at time of analysis, and the EPSS score is low (0.19%, 9th percentile); the issue is fixed and rated CVSS 7.0 (High).

Technical ContextAI

The affected component is the Display Abstraction Layer (DAL) inside AMD's Direct Rendering Manager display driver (drm/amd/display) in the Linux kernel. The dal_vector container grows its backing store via dal_vector_reserve(), which multiplied the requested capacity by the per-element struct_size using uint32_t arithmetic. When that product exceeds UINT32_MAX it wraps to a small number, so krealloc() allocates far less memory than the vector believes it has, and later element writes run past the allocation - a classic integer-overflow-leading-to-heap-buffer-overflow (CWE-190 feeding CWE-122). The CPE data identifies the affected product as cpe:2.3:a:linux:linux, i.e. the mainline Linux kernel, specifically builds that include the amdgpu display stack. The fix replaces krealloc() with krealloc_array(), which performs an internal size-multiplication overflow check and returns NULL instead of an undersized buffer; the change was cherry-picked from upstream commit 37668568641c.

RemediationAI

Apply the vendor-released patch by upgrading to a fixed stable kernel: 5.15.210, 6.1.176, 6.6.143, 6.12.94, 7.0.13, or 6.18.36 (fix also in mainline 7.1) - select the point release matching your maintained branch and reboot into it. Distribution users should install the corresponding vendor kernel update once it incorporates these stable commits (see kernel.org stable references, e.g. https://git.kernel.org/stable/c/31180638a33acad12c863132704a76536fb66211, and the NVD advisory https://nvd.nist.gov/vuln/detail/CVE-2026-53329). Where immediate patching is not possible, the practical compensating control is to restrict local access to systems with AMD GPUs and limit which users can open the amdgpu DRM render/display nodes, since exploitation requires local low-privileged access to that driver; on systems that do not need AMD graphics, avoiding or unloading the amdgpu module removes the code path entirely, at the cost of losing AMD GPU acceleration/display support. There is no remote exposure to mitigate, so network-layer controls do not apply.

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Vendor StatusVendor

SUSE

Severity: Moderate
Product Status
Image SLES15-SP7-Azure-3P Image SLES15-SP7-Azure-Basic Image SLES15-SP7-Azure-Standard Image SLES15-SP7-HPC-Azure Affected
Image SLES15-SP7-BYOS-Azure Image SLES15-SP7-BYOS-GCE Image SLES15-SP7-CHOST-BYOS-Aliyun Image SLES15-SP7-CHOST-BYOS-Azure Image SLES15-SP7-CHOST-BYOS-EC2 Image SLES15-SP7-CHOST-BYOS-GCE Image SLES15-SP7-CHOST-BYOS-GDC Image SLES15-SP7-CHOST-BYOS-SAP-CCloud Image SLES15-SP7-EC2 Image SLES15-SP7-EC2-ECS-HVM Image SLES15-SP7-GCE Image SLES15-SP7-HPC-BYOS-Azure Image SLES15-SP7-HPC-BYOS-EC2 Image SLES15-SP7-HPC-BYOS-GCE Image SLES15-SP7-Hardened-BYOS-Azure Image SLES15-SP7-Hardened-BYOS-EC2 Image SLES15-SP7-Hardened-BYOS-GCE Image SLES15-SP7-SAPCAL-Azure Image SLES15-SP7-SAPCAL-EC2 Image SLES15-SP7-SAPCAL-GCE Affected
Image SLES15-SP7-SAP-Azure Image SLES15-SP7-SAP-Azure-3P Image SLES15-SP7-SAP-BYOS-Azure Image SLES15-SP7-SAP-BYOS-EC2 Image SLES15-SP7-SAP-BYOS-GCE Image SLES15-SP7-SAP-EC2 Image SLES15-SP7-SAP-GCE Image SLES15-SP7-SAP-Hardened-Azure Image SLES15-SP7-SAP-Hardened-BYOS-Azure Image SLES15-SP7-SAP-Hardened-BYOS-EC2 Image SLES15-SP7-SAP-Hardened-BYOS-GCE Image SLES15-SP7-SAP-Hardened-GCE Affected
SUSE Linux Enterprise Desktop 15 SP7 Fixed
SUSE Linux Enterprise High Availability Extension 15 SP7 Fixed

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CVE-2026-53329 vulnerability details – vuln.today
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