CVE-2023-53316: linux kernel Use-After-Free — Fix

Description

In the Linux kernel, the following vulnerability has been resolved: drm/msm/dp: Free resources after unregistering them The DP component's unbind operation walks through the submodules to unregister and clean things up. But if the unbind happens because the DP controller itself is being removed, all the memory for those submodules has just been freed. Change the order of these operations to avoid the many use-after-free that otherwise happens in this code path. Patchwork: https://patchwork.freedesktop.org/patch/542166/

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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 — 5.10.188
linux	linux_kernel	5.11 — 5.15.121
linux	linux_kernel	5.16 — 6.1.39
linux	linux_kernel	6.2 — 6.3.13
linux	linux_kernel	6.4 — 6.4.4

References

Advisories & Patches

https://git.kernel.org/stable/c/3c3f3d35f5e05c468b048eb42a4f8c62c6655692 https://git.kernel.org/stable/c/4e9f1a2367aea7d61f6781213e25313cd983b0d7 https://git.kernel.org/stable/c/5c3278db06e332fdc14f3f297499fb88ded264d2 https://git.kernel.org/stable/c/c67a55f7cc8d767d624235bf1bcd0947e56abe0f https://git.kernel.org/stable/c/ca47d0dc00968358c136a1847cfed550cedfd1b5 https://git.kernel.org/stable/c/fa0048a4b1fa7a50c8b0e514f5b428abdf69a6f8

Frequently Asked Questions

What is CVE-2023-53316? +

In the Linux kernel, the following vulnerability has been resolved: drm/msm/dp: Free resources after unregistering them The DP component's unbind operation walks through the submodules to unregister and clean things up. But if the unbind happens because the DP controller itself is being removed, all the memory for those submodules has just been freed. Change the order of these operations to avoid the many use-after-free that otherwise happens in this code path. Patchwork: https://patchwork.freedesktop.org/patch/542166/ It has a CVSS v3.1 base score of 7.8 (HIGH).

How severe is CVE-2023-53316? +

CVE-2023-53316 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-2023-53316? +

CVE-2023-53316 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-2023-53316? +

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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