CVE-2026-64039
Received Received - Intake

Buffer Overflow Fix in Linux Kernel DRM MSM Snapshot

Publication date: 2026-07-19

Last updated on: 2026-07-19

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: drm/msm/snapshot: fix dumping of the unaligned regions The snapshotting code internally aligns data segment to 16 bytes. This works fine for DPU code (where most of the regions are aligned), but fails for snapshotting of the DSI data (because DSI data region is shifted by 4 bytes). Fix the code by removing length alignment and by accurately printing last registers in the region. While reworking the code also fix the 16x memory overallocation in msm_disp_state_dump_regs(). Patchwork: https://patchwork.freedesktop.org/patch/725449/

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Meta Information

Published
2026-07-19
Last Modified
2026-07-19
Generated
2026-07-20
AI Q&A
2026-07-19
EPSS Evaluated
N/A
NVD
CVE-2026-64039
EUVD
EUVD-2026-45612

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
linux linux_kernel *

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Exploitability

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KEV
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CWE ID Description
CWE-UNKNOWN

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Executive Summary

This vulnerability in the Linux kernel involves incorrect handling of unaligned memory regions during snapshotting. The code aligns data segments to 16 bytes, which works for most regions but fails for DSI data shifted by 4 bytes. This causes improper dumping of unaligned regions.

Detection Guidance

This vulnerability is specific to the Linux kernel's drm/msm/snapshot module and does not have network-based detection methods. Detection involves checking kernel logs for errors related to snapshot operations or misaligned memory regions. Commands like dmesg | grep -i snapshot or journalctl -k | grep -i snapshot may help identify issues.

Impact Analysis

This vulnerability may lead to incomplete or corrupted memory snapshots during kernel operations, potentially causing system instability or diagnostic inaccuracies. It affects systems using the msm DRM driver for display operations.

Compliance Impact

This vulnerability does not directly affect compliance with standards like GDPR or HIPAA as it is a low-level kernel memory issue unrelated to data protection or privacy.

Mitigation Strategies

Apply the kernel patch referenced in the CVE details. Update your Linux kernel to a patched version that includes the fix for drm/msm/snapshot. Monitor kernel logs for errors after applying the patch to ensure the issue is resolved.

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