CVE-2022-49729: linux kernel — Fix

Description

In the Linux kernel, the following vulnerability has been resolved: nfc: nfcmrvl: Fix memory leak in nfcmrvl_play_deferred Similar to the handling of play_deferred in commit 19cfe912c37b ("Bluetooth: btusb: Fix memory leak in play_deferred"), we thought a patch might be needed here as well. Currently usb_submit_urb is called directly to submit deferred tx urbs after unanchor them. So the usb_giveback_urb_bh would failed to unref it in usb_unanchor_urb and cause memory leak. Put those urbs in tx_anchor to avoid the leak, and also fix the error handling.

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CVSS v3.1 Score

5.5

MEDIUM

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

Weakness Type (CWE)

CWE-401 CWE-401

Affected Products

Vendor	Product	Versions
linux	linux_kernel	< 4.9.320
linux	linux_kernel	4.10 — 4.14.285
linux	linux_kernel	4.15 — 4.19.249
linux	linux_kernel	4.20 — 5.4.200
linux	linux_kernel	5.5 — 5.10.124
linux	linux_kernel	5.11 — 5.15.49
linux	linux_kernel	5.16 — 5.18.6
linux	linux_kernel	All

References

Advisories & Patches

https://git.kernel.org/stable/c/0eeec1a8b0cd38c47edeb042980a6aeacecf35ed https://git.kernel.org/stable/c/1eb0afecfb9cd0f38424b82bd9aaa542310934ee https://git.kernel.org/stable/c/3e7c7df6991ac349f2fa8540047757df666e610f https://git.kernel.org/stable/c/3eadc560c1919b8193d17334145dad9a917960e4 https://git.kernel.org/stable/c/6616872cfe7f0474a22dd1f12699f95bcf81a54d https://git.kernel.org/stable/c/6b4d8b44e7163a77fe942f5b80e1651c1b78c537 https://git.kernel.org/stable/c/8a4d480702b71184fabcf379b80bf7539716752e https://git.kernel.org/stable/c/f21f908347712b8288ffe83b531b5e977042b29c

Frequently Asked Questions

What is CVE-2022-49729? +

In the Linux kernel, the following vulnerability has been resolved: nfc: nfcmrvl: Fix memory leak in nfcmrvl_play_deferred Similar to the handling of play_deferred in commit 19cfe912c37b ("Bluetooth: btusb: Fix memory leak in play_deferred"), we thought a patch might be needed here as well. Currently usb_submit_urb is called directly to submit deferred tx urbs after unanchor them. So the usb_giveback_urb_bh would failed to unref it in usb_unanchor_urb and cause memory leak. Put those urbs in tx_anchor to avoid the leak, and also fix the error handling. It has a CVSS v3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2022-49729? +

CVE-2022-49729 has a CVSS v3.1 score of 5.5 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-2022-49729? +

CVE-2022-49729 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-2022-49729? +

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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