CVE-2023-52445

HIGH
Published Feb 22, 2024 Modified Nov 21, 2024 CWE-416

Description

In the Linux kernel, the following vulnerability has been resolved: media: pvrusb2: fix use after free on context disconnection Upon module load, a kthread is created targeting the pvr2_context_thread_func function, which may call pvr2_context_destroy and thus call kfree() on the context object. However, that might happen before the usb hub_event handler is able to notify the driver. This patch adds a sanity check before the invalid read reported by syzbot, within the context disconnection call stack.

Is your site exposed to CVE-2023-52445?

Run a free security scan — no signup, results in seconds.

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
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel

References

Advisories & Patches

https://git.kernel.org/stable/c/2cf0005d315549b8d2b940ff96a66c2a889aa795 https://git.kernel.org/stable/c/30773ea47d41773f9611ffb4ebc9bda9d19a9e7e https://git.kernel.org/stable/c/3233d8bf7893550045682192cb227af7fa3defeb https://git.kernel.org/stable/c/437b5f57732bb4cc32cc9f8895d2010ee9ff521c https://git.kernel.org/stable/c/47aa8fcd5e8b5563af4042a00f25ba89bef8f33d https://git.kernel.org/stable/c/ded85b0c0edd8f45fec88783d7555a5b982449c1 https://git.kernel.org/stable/c/ec3634ebe23fc3c44ebc67c6d25917300bc68c08 https://git.kernel.org/stable/c/ec36c134dd020d28e312c2f1766f85525e747aab https://git.kernel.org/stable/c/2cf0005d315549b8d2b940ff96a66c2a889aa795 https://git.kernel.org/stable/c/30773ea47d41773f9611ffb4ebc9bda9d19a9e7e https://git.kernel.org/stable/c/3233d8bf7893550045682192cb227af7fa3defeb https://git.kernel.org/stable/c/437b5f57732bb4cc32cc9f8895d2010ee9ff521c https://git.kernel.org/stable/c/47aa8fcd5e8b5563af4042a00f25ba89bef8f33d https://git.kernel.org/stable/c/ded85b0c0edd8f45fec88783d7555a5b982449c1 https://git.kernel.org/stable/c/ec3634ebe23fc3c44ebc67c6d25917300bc68c08 https://git.kernel.org/stable/c/ec36c134dd020d28e312c2f1766f85525e747aab

Frequently Asked Questions

What is CVE-2023-52445? +
In the Linux kernel, the following vulnerability has been resolved: media: pvrusb2: fix use after free on context disconnection Upon module load, a kthread is created targeting the pvr2_context_thread_func function, which may call pvr2_context_destroy and thus call kfree() on the context object. However, that might happen before the usb hub_event handler is able to notify the driver. This patch adds a sanity check before the invalid read reported by syzbot, within the context disconnection call stack. It has a CVSS v3.1 base score of 7.8 (HIGH).
How severe is CVE-2023-52445? +
CVE-2023-52445 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-2023-52445? +
CVE-2023-52445 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-2023-52445? +
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.

Related Vulnerabilities

CVE-2026-55406

Buffa is a pure-Rust Protocol Buffers implementation with first-class protobuf editions support. Prior to 0.7.0, a soundness bug in the …
CVE-2026-6040

A heap use-after-free existed when importing the blank-width characters of an ODF number format. A position value read from the …
CVE-2025-24898

rust-openssl is a set of OpenSSL bindings for the Rust programming language. In affected versions `ssl::select_next_proto` can return a slice …
CVE-2025-31115

XZ Utils provide a general-purpose data-compression library plus command-line tools. In XZ Utils 5.3.3alpha to 5.8.0, the multithreaded .xz decoder …
CVE-2025-31498

c-ares is an asynchronous resolver library. From 1.32.3 through 1.34.4, there is a use-after-free in read_answers() when process_answer() may re-enqueue …
CVE-2025-4516

There is an issue in CPython when using `bytes.decode("unicode_escape", error="ignore|replace")`. If you are not using the "unicode_escape" encoding or an …

Don't wait for an exploit

Scan your website for vulnerabilities like CVE-2023-52445 — free, no signup required.