CVE-2022-49288: linux kernel Use-After-Free — Fix

Description

In the Linux kernel, the following vulnerability has been resolved: ALSA: pcm: Fix races among concurrent prealloc proc writes We have no protection against concurrent PCM buffer preallocation changes via proc files, and it may potentially lead to UAF or some weird problem. This patch applies the PCM open_mutex to the proc write operation for avoiding the racy proc writes and the PCM stream open (and further operations).

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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	< 4.14.279
linux	linux_kernel	4.15 — 4.19.243
linux	linux_kernel	4.20 — 5.4.193
linux	linux_kernel	5.5 — 5.10.109
linux	linux_kernel	5.11 — 5.15.32
linux	linux_kernel	5.16 — 5.16.18
linux	linux_kernel	5.17 — 5.17.1

References

Advisories & Patches

https://git.kernel.org/stable/c/37b12c16beb6f6c1c3c678c1aacbc46525c250f7 https://git.kernel.org/stable/c/51fce708ab8986a9879ee5da946a2cc120f1036d https://git.kernel.org/stable/c/5ed8f8e3c4e59d0396b9ccf2e639711e24295bb6 https://git.kernel.org/stable/c/69534c48ba8ce552ce383b3dfdb271ffe51820c3 https://git.kernel.org/stable/c/a21d2f323b5a978dedf9ff1d50f101f85e39b3f2 https://git.kernel.org/stable/c/b560d670c87d7d40b3cf6949246fa4c7aa65a00a https://git.kernel.org/stable/c/e14dca613e0a6ddc2bf6e360f16936a9f865205b https://git.kernel.org/stable/c/e7786c445bb67a9a6e64f66ebd6b7215b153ff7d

Frequently Asked Questions

What is CVE-2022-49288? +

In the Linux kernel, the following vulnerability has been resolved: ALSA: pcm: Fix races among concurrent prealloc proc writes We have no protection against concurrent PCM buffer preallocation changes via proc files, and it may potentially lead to UAF or some weird problem. This patch applies the PCM open_mutex to the proc write operation for avoiding the racy proc writes and the PCM stream open (and further operations). It has a CVSS v3.1 base score of 7.8 (HIGH).

How severe is CVE-2022-49288? +

CVE-2022-49288 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-2022-49288? +

CVE-2022-49288 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-2022-49288? +

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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