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CVE-2022-50022: drivers:md:fix a potential use-after-free bug

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-06-18 · updated 2026-08-04
• Weakness: CWE-416

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.

Affected products

• Linux kernel: from 4.1 before 4.9.326; from 4.10 before 4.14.291; from 4.15 before 4.19.256; from 4.20 before 5.4.211; from 5.5 before 5.10.138; from 5.11 before 5.15.63 — fixed in 4.14.291, 4.19.256, 4.9.326, 5.10.138, 5.15.63, 5.19.4

How to fix

Upgrade to a fixed version: Linux kernel 4.14.291, 4.19.256, 4.9.326, 5.10.138. Check the vendor advisory for mitigations.

References

• 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

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