CVE-2022-48899: linux kernel Use-After-Free — Fix

Description

In the Linux kernel, the following vulnerability has been resolved: drm/virtio: Fix GEM handle creation UAF Userspace can guess the handle value and try to race GEM object creation with handle close, resulting in a use-after-free if we dereference the object after dropping the handle's reference. For that reason, dropping the handle's reference must be done *after* we are done dereferencing the object.

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CVSS v3.1 Score

4.7

MEDIUM

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

Weakness Type (CWE)

CWE-416 Use After Free

Affected Products

Vendor	Product	Versions
linux	linux_kernel	4.4 — 4.19.270
linux	linux_kernel	4.20 — 5.4.229
linux	linux_kernel	5.5 — 5.10.164
linux	linux_kernel	5.11 — 5.15.89
linux	linux_kernel	5.16 — 6.1.7
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All

References

Advisories & Patches

https://git.kernel.org/stable/c/011ecdbcd520c90c344b872ca6b4821f7783b2f8 https://git.kernel.org/stable/c/19ec87d06acfab2313ee82b2a689bf0c154e57ea https://git.kernel.org/stable/c/52531258318ed59a2dc5a43df2eaf0eb1d65438e https://git.kernel.org/stable/c/68bcd063857075d2f9edfed6024387ac377923e2 https://git.kernel.org/stable/c/adc48e5e408afbb01d261bd303fd9fbbbaa3e317 https://git.kernel.org/stable/c/d01d6d2b06c0d8390adf8f3ba08aa60b5642ef73

Frequently Asked Questions

What is CVE-2022-48899? +

In the Linux kernel, the following vulnerability has been resolved: drm/virtio: Fix GEM handle creation UAF Userspace can guess the handle value and try to race GEM object creation with handle close, resulting in a use-after-free if we dereference the object after dropping the handle's reference. For that reason, dropping the handle's reference must be done *after* we are done dereferencing the object. It has a CVSS v3.1 base score of 4.7 (MEDIUM).

How severe is CVE-2022-48899? +

CVE-2022-48899 has a CVSS v3.1 score of 4.7 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2022-48899? +

CVE-2022-48899 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-2022-48899? +

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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