CVE-2022-48792: linux kernel Use-After-Free — Fix

Description

In the Linux kernel, the following vulnerability has been resolved: scsi: pm8001: Fix use-after-free for aborted SSP/STP sas_task Currently a use-after-free may occur if a sas_task is aborted by the upper layer before we handle the I/O completion in mpi_ssp_completion() or mpi_sata_completion(). In this case, the following are the two steps in handling those I/O completions: - Call complete() to inform the upper layer handler of completion of the I/O. - Release driver resources associated with the sas_task in pm8001_ccb_task_free() call. When complete() is called, the upper layer may free the sas_task. As such, we should not touch the associated sas_task afterwards, but we do so in the pm8001_ccb_task_free() call. Fix by swapping the complete() and pm8001_ccb_task_free() calls ordering.

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CVSS v3.1 Score

7.8

HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness Type (CWE)

CWE-416 Use After Free

Affected Products

Vendor	Product	Versions
linux	linux_kernel	< 5.10.102
linux	linux_kernel	5.11 — 5.15.25
linux	linux_kernel	5.16 — 5.16.11

References

Advisories & Patches

https://git.kernel.org/stable/c/d9d93f32534a0a80a1c26bdb0746d90a7b19c2c2 https://git.kernel.org/stable/c/df7abcaa1246e2537ab4016077b5443bb3c09378 https://git.kernel.org/stable/c/f61f9fccb2cb4bb275674a79d638704db6bc2171 https://git.kernel.org/stable/c/fe9ac3eaa2e387a5742b380b73a5a6bc237bf184 https://git.kernel.org/stable/c/d9d93f32534a0a80a1c26bdb0746d90a7b19c2c2 https://git.kernel.org/stable/c/df7abcaa1246e2537ab4016077b5443bb3c09378 https://git.kernel.org/stable/c/f61f9fccb2cb4bb275674a79d638704db6bc2171 https://git.kernel.org/stable/c/fe9ac3eaa2e387a5742b380b73a5a6bc237bf184

Frequently Asked Questions

What is CVE-2022-48792? +

In the Linux kernel, the following vulnerability has been resolved: scsi: pm8001: Fix use-after-free for aborted SSP/STP sas_task Currently a use-after-free may occur if a sas_task is aborted by the upper layer before we handle the I/O completion in mpi_ssp_completion() or mpi_sata_completion(). In this case, the following are the two steps in handling those I/O completions: - Call complete() to inform the upper layer handler of completion of the I/O. - Release driver resources associated with the sas_task in pm8001_ccb_task_free() call. When complete() is called, the upper layer may free the sas_task. As such, we should not touch the associated sas_task afterwards, but we do so in the pm8001_ccb_task_free() call. Fix by swapping the complete() and pm8001_ccb_task_free() calls ordering. It has a CVSS v3.1 base score of 7.8 (HIGH).

How severe is CVE-2022-48792? +

CVE-2022-48792 has a CVSS v3.1 score of 7.8 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2022-48792? +

CVE-2022-48792 affects products from linux, specifically: linux_kernel. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2022-48792? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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