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Review reviewHigh

CVE-2026-64438

Linux

In the Linux kernel, the following vulnerability has been resolved: crypto: qat - fix VF2PF work teardown race in adf_disable_sriov() The VF2PF interrupt handler queues PF-side response work that stores a raw pointer to per-VF state (struct adf_accel_vf_info). Currently, adf_disable_sriov() destroys per-VF mutexes and frees vf_info without stopping new VF2PF work or waiting for in-flight workers to complete. A concurrently scheduled or already queued worker can then dereference freed memory. This manifests as a use-after-free when KASAN is enabled: BUG: KASAN: null-ptr-deref in mutex_lock+0...

CVSS
8.8
EPSS
-
- percentile
CISA KEV
Not listed
Published
2026.07.25
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability-
Technical severityCVSS 8.8

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: crypto: qat - fix VF2PF work teardown race in adf_disable_sriov() The VF2PF interrupt handler queues PF-side response work that stores a raw pointer to per-VF state (struct adf_accel_vf_info). Currently, adf_disable_sriov() destroys per-VF mutexes and frees vf_info without stopping new VF2PF work or waiting for in-flight workers to complete. A concurrently scheduled or already queued worker can then dereference freed memory. This manifests as a use-after-free when KASAN is enabled: BUG: KASAN: null-ptr-deref in mutex_lock+0...

Affected product and versions

Product
Linux
Affected versions
>= ed8ccaef52fa03fb03cff45b380f72c9f869f273 < 218c2836b3987f3fa1d9eac505462cded0821e4c, >= ed8ccaef52fa03fb03cff45b380f72c9f869f273 < 446b4d77599cf1a168573f7fb32a4a6aa4f09219, >= ed8ccaef52fa03fb03cff45b380f72c9f869f273 < 5d916c1eae1933511a69bffe243b4ee5d7da399c, >= ed8ccaef52fa03fb03cff45b380f72c9f869f273 < f344a369d0380d54c8d6c8d24734a78dd5a89817, >= ed8ccaef52fa03fb03cff45b380f72c9f869f273 < 51144032248cc4ea22917370565650670b8b4e9b, >= ed8ccaef52fa03fb03cff45b380f72c9f869f273 < 49cd5ac6de8de39a14ead609bb552d372d5602cd, >= ed8ccaef52fa03fb03cff45b380f72c9f869f273 < 6e92b28cd74fa433658efeadf21b9d4b01023d7d, >= ed8ccaef52fa03fb03cff45b380f72c9f869f273 < 277281c10c63791067d24d421f7c43a15faa9096, >= 4.3
Fixed versions
No verified fixed-version field is available yet

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux 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
Not available