CVE-2022-49455: linux kernel Double Free — Fix

Description

In the Linux kernel, the following vulnerability has been resolved: misc: ocxl: fix possible double free in ocxl_file_register_afu info_release() will be called in device_unregister() when info->dev's reference count is 0. So there is no need to call ocxl_afu_put() and kfree() again. Fix this by adding free_minor() and return to err_unregister error path.

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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-415 CWE-415

Affected Products

Vendor	Product	Versions
linux	linux_kernel	5.2 — 5.4.198
linux	linux_kernel	5.5 — 5.10.121
linux	linux_kernel	5.11 — 5.15.46
linux	linux_kernel	5.16 — 5.17.14
linux	linux_kernel	5.18 — 5.18.3

References

Advisories & Patches

https://git.kernel.org/stable/c/252768d32e92c1214aeebb5fec0844ca479bcf5c https://git.kernel.org/stable/c/8fb674216835e1f0c143762696d645facebb4685 https://git.kernel.org/stable/c/950cf957fe34d40d63dfa3bf3968210430b6491e https://git.kernel.org/stable/c/9e9087cf34ee69f4e95d146ac29385d6e367a97b https://git.kernel.org/stable/c/de65c32ace9aa70d51facc61ba986607075e3a25 https://git.kernel.org/stable/c/ee89d8dee55ab4b3b8ad8b70866b2841ba334767

Frequently Asked Questions

What is CVE-2022-49455? +

In the Linux kernel, the following vulnerability has been resolved: misc: ocxl: fix possible double free in ocxl_file_register_afu info_release() will be called in device_unregister() when info->dev's reference count is 0. So there is no need to call ocxl_afu_put() and kfree() again. Fix this by adding free_minor() and return to err_unregister error path. It has a CVSS v3.1 base score of 7.8 (HIGH).

How severe is CVE-2022-49455? +

CVE-2022-49455 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-2022-49455? +

CVE-2022-49455 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-2022-49455? +

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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