CVE-2022-50022: linux kernel Use-After-Free — Fix

Description

In the Linux kernel, the following vulnerability has been resolved: drivers:md:fix a potential use-after-free bug In line 2884, "raid5_release_stripe(sh);" drops the reference to sh and may cause sh to be released. However, sh is subsequently used in lines 2886 "if (sh->batch_head && sh != sh->batch_head)". This may result in an use-after-free bug. It can be fixed by moving "raid5_release_stripe(sh);" to the bottom of the function.

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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	4.1 — 4.9.326
linux	linux_kernel	4.10 — 4.14.291
linux	linux_kernel	4.15 — 4.19.256
linux	linux_kernel	4.20 — 5.4.211
linux	linux_kernel	5.5 — 5.10.138
linux	linux_kernel	5.11 — 5.15.63
linux	linux_kernel	5.16 — 5.19.4

References

Advisories & Patches

https://git.kernel.org/stable/c/09cf99bace7789d91caa8d10fbcfc8b2fb35857f https://git.kernel.org/stable/c/104212471b1c1817b311771d817fb692af983173 https://git.kernel.org/stable/c/5d8325fd15892c8ab1146edc1d7ed8463de39636 https://git.kernel.org/stable/c/7470a4314b239e9a9580f248fdf4c9a92805490e https://git.kernel.org/stable/c/d9b94c3ace549433de8a93eeb27b0391fc8ac406 https://git.kernel.org/stable/c/e5b3dd2d92c4511e81f6e4ec9c5bb7ad25e03d13 https://git.kernel.org/stable/c/eb3a4f73f43f839df981dda5859e8e075067a360 https://git.kernel.org/stable/c/f5d46f1b47f65da1faf468277b261eb78c8e25b5

Frequently Asked Questions

What is CVE-2022-50022? +

In the Linux kernel, the following vulnerability has been resolved: drivers:md:fix a potential use-after-free bug In line 2884, "raid5_release_stripe(sh);" drops the reference to sh and may cause sh to be released. However, sh is subsequently used in lines 2886 "if (sh->batch_head && sh != sh->batch_head)". This may result in an use-after-free bug. It can be fixed by moving "raid5_release_stripe(sh);" to the bottom of the function. It has a CVSS v3.1 base score of 7.8 (HIGH).

How severe is CVE-2022-50022? +

CVE-2022-50022 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-2022-50022? +

CVE-2022-50022 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-2022-50022? +

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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