What’s Vulnerable › Vulnerabilities

CVE-2026-68427: gpu: host1x: Fix use-after-free in host1x_bo_clear_cached_mappings

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-10 · updated 2026-10-19
• Weakness: CWE-416

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.

Affected products

• Linux kernel: from 6.1.178 before 6.1.183; from 6.6.145 before 6.6.148; from 6.12.97 before 6.12.101; from 6.18.40 before 6.18.42; from 7.1.5 before 7.1.6 — fixed in 6.1.183, 6.12.101, 6.18.42, 6.6.148, 7.1.6

How to fix

Upgrade to a fixed version: Linux kernel 6.1.183, 6.12.101, 6.18.42, 6.6.148. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/266cddf7bd0f6c79b6c0633aef742a22bf70265b
• https://git.kernel.org/stable/c/5b7e5f84d3d4cea10c3764d2da274810a7934228
• https://git.kernel.org/stable/c/5f4de3c717d34a24d555af581947742980778c02
• https://git.kernel.org/stable/c/86a9bd8c8f422d5f3079da31e151868902fcc702
• https://git.kernel.org/stable/c/abeff53233b984571b87582bb588b4b38ef4ea50
• https://git.kernel.org/stable/c/b773faa32b0a98c3eb2b50d96de631681e5d1157

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