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Review reviewHigh

CVE-2026-53281

Linux Linux, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9

In the Linux kernel, the following vulnerability has been resolved: iommu/vt-d: Avoid NULL pointer dereference or refcount corruption Commit 60f030f7418d ("iommu/vt-d: Avoid use of NULL after WARN_ON_ONCE") fixed a NULL pointer dereference in an unlikely situation partly. If dev_pasid is not found in the dev_pasids list, it remains NULL. However, the teardown operations are executed unconditionally, this lead to a NULL pointer dereference or refcount corruption. If the domain was never attached to this IOMMU, info will be NULL, which would cause an immediate dereference when checking --info...

CVSS
8.8
EPSS
0.13%
3.00% percentile
CISA KEV
Not listed
Published
2026.06.27
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.13%
Technical severityCVSS 8.8

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: iommu/vt-d: Avoid NULL pointer dereference or refcount corruption Commit 60f030f7418d ("iommu/vt-d: Avoid use of NULL after WARN_ON_ONCE") fixed a NULL pointer dereference in an unlikely situation partly. If dev_pasid is not found in the dev_pasids list, it remains NULL. However, the teardown operations are executed unconditionally, this lead to a NULL pointer dereference or refcount corruption. If the domain was never attached to this IOMMU, info will be NULL, which would cause an immediate dereference when checking --info...

Affected product and versions

Product
Linux Linux, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9
Affected versions
>= 60f030f7418d3f1d94f2fb207fe3080e1844630b < 9022cb9ac0c2a72a57fa8ebf92ac74f953ca0153, >= 60f030f7418d3f1d94f2fb207fe3080e1844630b < cdfe3c9f2c9e28a8651ee463c88ad191ced2f840, >= 60f030f7418d3f1d94f2fb207fe3080e1844630b < 79ea2feb917b05366b49d85573c9c5331f043b2c, >= 68ec78beb4a3fb0877cbaaf49758c85410c05977, >= df96876be3b064aefc493f760e0639765d13ed0d, >= 6.12.57 < 6.13, >= 6.13.3 < 6.14, >= 6.14, >= 6.13.3 < 6.18.33, >= 6.19 < 7.0.10, 7.1
Fixed versions
6.13, 6.18.33, 7.0.10

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux Linux, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9 and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
CWE
CWE-476
CVE-2026-53281 — Linux Linux, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9 | SECUFOCUS NOW