CVE-2022-49608: linux kernel Null Dereference — Fix

Description

In the Linux kernel, the following vulnerability has been resolved: pinctrl: ralink: Check for null return of devm_kcalloc Because of the possible failure of the allocation, data->domains might be NULL pointer and will cause the dereference of the NULL pointer later. Therefore, it might be better to check it and directly return -ENOMEM without releasing data manually if fails, because the comment of the devm_kmalloc() says "Memory allocated with this function is automatically freed on driver detach.".

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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-476 CWE-476

Affected Products

Vendor	Product	Versions
linux	linux_kernel	4.18 — 4.19.254
linux	linux_kernel	4.20 — 5.4.208
linux	linux_kernel	5.5 — 5.10.134
linux	linux_kernel	5.11 — 5.15.58
linux	linux_kernel	5.16 — 5.18.15
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All

References

Advisories & Patches

https://git.kernel.org/stable/c/13596e6c9e541e90e5fc2c52b23f08b951370da9 https://git.kernel.org/stable/c/44016a85419ca0d4f1e4d0127b330f8e4e2a57d0 https://git.kernel.org/stable/c/5595d30c4dc27d939635c3188c68203b6ece1711 https://git.kernel.org/stable/c/5694b162f275fb9a9f89422701b2b963be11e496 https://git.kernel.org/stable/c/6194c021496addc11763d1ffa89ce5751889fe3c https://git.kernel.org/stable/c/c3b821e8e406d5650e587b7ac624ac24e9b780a8

Frequently Asked Questions

What is CVE-2022-49608? +

In the Linux kernel, the following vulnerability has been resolved: pinctrl: ralink: Check for null return of devm_kcalloc Because of the possible failure of the allocation, data->domains might be NULL pointer and will cause the dereference of the NULL pointer later. Therefore, it might be better to check it and directly return -ENOMEM without releasing data manually if fails, because the comment of the devm_kmalloc() says "Memory allocated with this function is automatically freed on driver detach.". It has a CVSS v3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2022-49608? +

CVE-2022-49608 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-2022-49608? +

CVE-2022-49608 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-2022-49608? +

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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