CVE-2026-74380

Memory access via ignored IOMMU mapping errors

Published Aug 15, 2026 · Updated Aug 15, 2026

Integer overflow in the host1x GPU driver in Linux allows local users to access unintended memory through render-node job submission. pin_job stores an IOMMU mapping result in an undersized integer and fails to reject mapping errors before GPU DMA uses the resulting IOVA. Reachability requires a Tegra DRM render node with host1x IOMMU enabled; failures can expose or corrupt memory and hang or crash the system.

CVSS severity8.8
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

Integer overflow in the host1x GPU driver in Linux allows local users to access unintended memory through render-node job submission. pin_job stores an IOMMU mapping result in an undersized integer and fails to reject mapping errors before GPU DMA uses the resulting IOVA. Reachability requires a Tegra DRM render node with host1x IOMMU enabled; failures can expose or corrupt memory and hang or crash the system.

The record

CVE
CVE-2026-74380
Published
Aug 15, 2026
Updated
Aug 15, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-190, T1068, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 15, 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=5.15
  2. Affected versionversion=ad8f36e4b6b1c826a0daa5fda2c5839205b5aa8b <18f74762013a4b6aa6f905c4459e0f506f9c5c7b
  3. Affected versionversion=ad8f36e4b6b1c826a0daa5fda2c5839205b5aa8b <2a68928c445138961e2c451983b473aeb3f5b999
  4. Affected versionversion=ad8f36e4b6b1c826a0daa5fda2c5839205b5aa8b <3ac173e46ef6fda9c9df8d47cdff4df962df9728
  5. Affected versionversion=ad8f36e4b6b1c826a0daa5fda2c5839205b5aa8b <5f3985c2a500df3126cb12a2e0ccf26a40bc495d
  6. Affected versionversion=ad8f36e4b6b1c826a0daa5fda2c5839205b5aa8b <79240eee5a40014d9edfabe19f06b35ffa84e5f8
  7. Affected versionversion=ad8f36e4b6b1c826a0daa5fda2c5839205b5aa8b <e024c7993d839503d6c1f0044b8fc537c30300e9

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.15; version=ad8f36e4b6b1c826a0daa5fda2c5839205b5aa8b <18f74762013a4b6aa6f905c4459e0f506f9c5c7b; version=ad8f36e4b6b1c826a0daa5fda2c5839205b5aa8b <2a68928c445138961e2c451983b473aeb3f5b999; version=ad8f36e4b6b1c826a0daa5fda2c5839205b5aa8b <3ac173e46ef6fda9c9df8d47cdff4df962df9728; version=ad8f36e4b6b1c826a0daa5fda2c5839205b5aa8b <5f3985c2a500df3126cb12a2e0ccf26a40bc495d; version=ad8f36e4b6b1c826a0daa5fda2c5839205b5aa8b <79240eee5a40014d9edfabe19f06b35ffa84e5f8; version=ad8f36e4b6b1c826a0daa5fda2c5839205b5aa8b <e024c7993d839503d6c1f0044b8fc537c30300e9

Published CVSS scores

8.8Linux CNACVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
5.5Red HatCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5Oracle LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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-190Integer Overflow or Wraparound
T1068Exploitation for Privilege Escalation
T1499Endpoint Denial of Service

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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