CVE-2026-68427
Received Received - Intake

Use-After-Free in Linux Kernel Host1x GPU Driver

Publication date: 2026-08-10

Last updated on: 2026-08-10

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: gpu: host1x: Fix use-after-free in host1x_bo_clear_cached_mappings __host1x_bo_unpin() drops the last reference to the mapping and frees it, so we can't dereference mapping afterwards. The cache itself outlives the mapping, so use the cache local variable instead.

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Meta Information

Published
2026-08-10
Last Modified
2026-08-10
Generated
2026-08-10
AI Q&A
2026-08-10
EPSS Evaluated
N/A
NVD
CVE-2026-68427
EUVD
EUVD-2026-55613

Affected Vendors & Products

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

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Exploitability

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CWE ID Description
CWE-UNKNOWN

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Executive Summary

This is a use-after-free vulnerability in the Linux kernel's GPU host1x driver. It occurs when host1x_bo_clear_cached_mappings tries to access a freed memory mapping after __host1x_bo_unpin has already released it. The fix ensures the cache variable is used instead of the freed mapping.

Detection Guidance

This vulnerability is specific to the Linux kernel's GPU host1x driver and does not have network-based detection methods. Detection requires checking the kernel version and examining kernel logs for use-after-free errors in host1x_bo_clear_cached_mappings.

Impact Analysis

This could cause system crashes or instability if exploited. It may allow local attackers to execute arbitrary code or escalate privileges on affected systems running vulnerable Linux kernel versions.

Mitigation Strategies

Update the Linux kernel to a patched version that includes the fix for CVE-2026-68427. Monitor kernel logs for related errors and ensure GPU drivers are functioning correctly after the update.

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