CVE-2023-53388: linux kernel Use-After-Free — Fix

Description

In the Linux kernel, the following vulnerability has been resolved: drm/mediatek: Clean dangling pointer on bind error path mtk_drm_bind() can fail, in which case drm_dev_put() is called, destroying the drm_device object. However a pointer to it was still being held in the private object, and that pointer would be passed along to DRM in mtk_drm_sys_prepare() if a suspend were triggered at that point, resulting in a panic. Clean the pointer when destroying the object in the error path to prevent this from happening.

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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	4.7 — 4.19.276
linux	linux_kernel	4.20 — 5.4.235
linux	linux_kernel	5.5 — 5.10.173
linux	linux_kernel	5.11 — 5.15.99
linux	linux_kernel	5.16 — 6.1.16
linux	linux_kernel	6.2 — 6.2.3

References

Advisories & Patches

https://git.kernel.org/stable/c/36aa8c61af55675ed967900fbe5deb32d776f051 https://git.kernel.org/stable/c/49cf87919daeeeeeb9e924c39bdd9203af434461 https://git.kernel.org/stable/c/6a89ddee1686a8872384aaa9f0bcfa6b675acd86 https://git.kernel.org/stable/c/7b551a501fa714890e55bae73efede1185728d72 https://git.kernel.org/stable/c/9a48f99aa7bea15e0b1d8b0040c46b4792eddf3b https://git.kernel.org/stable/c/a161f1d92aabb3b8463f752bdc3474dc3a5ec0e5 https://git.kernel.org/stable/c/f3887c771576c5d740c5c5b8bf654a8ab8020b7d

Frequently Asked Questions

What is CVE-2023-53388? +

In the Linux kernel, the following vulnerability has been resolved: drm/mediatek: Clean dangling pointer on bind error path mtk_drm_bind() can fail, in which case drm_dev_put() is called, destroying the drm_device object. However a pointer to it was still being held in the private object, and that pointer would be passed along to DRM in mtk_drm_sys_prepare() if a suspend were triggered at that point, resulting in a panic. Clean the pointer when destroying the object in the error path to prevent this from happening. It has a CVSS v3.1 base score of 7.8 (HIGH).

How severe is CVE-2023-53388? +

CVE-2023-53388 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-2023-53388? +

CVE-2023-53388 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-2023-53388? +

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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