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Review reviewHigh

CVE-2022-48796

Linux Linux, linux kernel

In the Linux kernel, the following vulnerability has been resolved: iommu: Fix potential use-after-free during probe Kasan has reported the following use after free on dev->iommu. when a device probe fails and it is in process of freeing dev->iommu in dev_iommu_free function, a deferred_probe_work_func runs in parallel and tries to access dev->iommu->fwspec in of_iommu_configure path thus causing use after free. BUG: KASAN: use-after-free in of_iommu_configure+0xb4/0x4a4 Read of size 8 at addr ffffff87a2f1acb8 by task kworker/u16:2/153 Workqueue: events_unbound deferred_probe_work_func Call...

CVSS
7.8
EPSS
-
- percentile
CISA KEV
Not listed
Published
2024.07.16
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability-
Technical severityCVSS 7.8

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: iommu: Fix potential use-after-free during probe Kasan has reported the following use after free on dev->iommu. when a device probe fails and it is in process of freeing dev->iommu in dev_iommu_free function, a deferred_probe_work_func runs in parallel and tries to access dev->iommu->fwspec in of_iommu_configure path thus causing use after free. BUG: KASAN: use-after-free in of_iommu_configure+0xb4/0x4a4 Read of size 8 at addr ffffff87a2f1acb8 by task kworker/u16:2/153 Workqueue: events_unbound deferred_probe_work_func Call...

Affected product and versions

Product
Linux Linux, linux kernel
Affected versions
>= 0c830e6b32826311fc2b9ea1f4679be0f4ef0933 < cb86e511e78e796de6947b8f3acca1b7c76fb2ff, >= 0c830e6b32826311fc2b9ea1f4679be0f4ef0933 < 65ab30f6a6952fa9ee13009862736cf8d110e6e5, >= 0c830e6b32826311fc2b9ea1f4679be0f4ef0933 < f74fc4b5bd533ea3d30ce47cccb8ef8d21fda85a, >= 0c830e6b32826311fc2b9ea1f4679be0f4ef0933 < b54240ad494300ff0994c4539a531727874381f4, >= 5.3, >= 5.7 < 5.10.101, >= 5.11 < 5.15.24, >= 5.16 < 5.16.10, 5.17
Fixed versions
5.10.101, 5.15.24, 5.16.10

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux Linux, linux kernel 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:U/C:H/I:H/A:H
CWE
CWE-416