CVE-2023-53494: linux kernel Use-After-Free — Fix

Description

In the Linux kernel, the following vulnerability has been resolved: crypto: xts - Handle EBUSY correctly As it is xts only handles the special return value of EINPROGRESS, which means that in all other cases it will free data related to the request. However, as the caller of xts may specify MAY_BACKLOG, we also need to expect EBUSY and treat it in the same way. Otherwise backlogged requests will trigger a use-after-free.

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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	5.4 — 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/51c082514c2dedf2711c99d93c196cc4eedceb40 https://git.kernel.org/stable/c/57c3e1d63b63dc0841d41df729297cd7c1c35808 https://git.kernel.org/stable/c/912eb10b65646ffd222256c78a1c566a3dac177d https://git.kernel.org/stable/c/92a07ba4f0af2cccdc2aa5ee32679c9c9714db90 https://git.kernel.org/stable/c/d5870848879291700fe6c5257dcb48aadd10425c

Frequently Asked Questions

What is CVE-2023-53494? +

In the Linux kernel, the following vulnerability has been resolved: crypto: xts - Handle EBUSY correctly As it is xts only handles the special return value of EINPROGRESS, which means that in all other cases it will free data related to the request. However, as the caller of xts may specify MAY_BACKLOG, we also need to expect EBUSY and treat it in the same way. Otherwise backlogged requests will trigger a use-after-free. It has a CVSS v3.1 base score of 7.8 (HIGH).

How severe is CVE-2023-53494? +

CVE-2023-53494 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-2023-53494? +

CVE-2023-53494 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-2023-53494? +

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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