CVE-2026-68427

Local kernel memory corruption via freed Host1x mapping

Published Aug 10, 2026 · Updated Aug 10, 2026

Use-after-free in the Linux kernel's Host1x GPU driver allows local users to corrupt kernel memory through the Tegra DRM device. host1x_bo_clear_cached_mappings calls __host1x_bo_unpin, which frees mapping, then dereferences mapping->cache to unlock a mutex through freed memory. Exploitation requires local access to a Tegra DRM/KMS device node and can disclose or corrupt kernel memory, crash or hang the system, or hijack control flow.

CVSS severity7.8
High
EPSS probability0.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in the Linux kernel's Host1x GPU driver allows local users to corrupt kernel memory through the Tegra DRM device. host1x_bo_clear_cached_mappings calls __host1x_bo_unpin, which frees mapping, then dereferences mapping->cache to unlock a mutex through freed memory. Exploitation requires local access to a Tegra DRM/KMS device node and can disclose or corrupt kernel memory, crash or hang the system, or hijack control flow.

The record

CVE
CVE-2026-68427
Published
Aug 10, 2026
Updated
Aug 10, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-825, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 10, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <6.12.101
  2. Affected versionversion=0 <6.18.42
  3. Affected versionversion=0 <6.6.148
  4. Affected versionversion=0 <7.1.6
  5. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <266cddf7bd0f6c79b6c0633aef742a22bf70265b
  6. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <5b7e5f84d3d4cea10c3764d2da274810a7934228
  7. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <5f4de3c717d34a24d555af581947742980778c02
  8. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <abeff53233b984571b87582bb588b4b38ef4ea50
  9. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <b773faa32b0a98c3eb2b50d96de631681e5d1157

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=0 <6.12.101; version=0 <6.18.42; version=0 <6.6.148; version=0 <7.1.6; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <266cddf7bd0f6c79b6c0633aef742a22bf70265b; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <5b7e5f84d3d4cea10c3764d2da274810a7934228; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <5f4de3c717d34a24d555af581947742980778c02; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <abeff53233b984571b87582bb588b4b38ef4ea50; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <b773faa32b0a98c3eb2b50d96de631681e5d1157

Published CVSS scores

7.8Linux CNACVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-825Expired Pointer Dereference
T1068Exploitation for Privilege Escalation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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