CVE-2022-49212: linux kernel — Fix

Description

In the Linux kernel, the following vulnerability has been resolved: mtd: rawnand: atmel: fix refcount issue in atmel_nand_controller_init The reference counting issue happens in several error handling paths on a refcounted object "nc->dmac". In these paths, the function simply returns the error code, forgetting to balance the reference count of "nc->dmac", increased earlier by dma_request_channel(), which may cause refcount leaks. Fix it by decrementing the refcount of specific object in those error paths.

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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

Affected Products

Vendor	Product	Versions
linux	linux_kernel	4.12 — 4.14.276
linux	linux_kernel	4.15 — 4.19.238
linux	linux_kernel	4.20 — 5.4.189
linux	linux_kernel	5.5 — 5.10.110
linux	linux_kernel	5.11 — 5.15.33
linux	linux_kernel	5.16 — 5.16.19
linux	linux_kernel	5.17 — 5.17.2

References

Advisories & Patches

https://git.kernel.org/stable/c/0856bf27057561f42b37df111603cf5a0d040294 https://git.kernel.org/stable/c/8baea2b96fa90af8d0f937caf4cf2105ee094d93 https://git.kernel.org/stable/c/9843c9c98f26c6ad843260b19bfdaa2598f2ae1e https://git.kernel.org/stable/c/9b08d211db4c447eb1a07df65e45e0aa772e0fa6 https://git.kernel.org/stable/c/a3587259ae553e41d1ce8c7435351a5d6b299a11 https://git.kernel.org/stable/c/f1694169f3674cdf7553aed06864254635679878 https://git.kernel.org/stable/c/fe0e2ce5c87e9c0b9485ff566362030aa55972cf https://git.kernel.org/stable/c/fecbd4a317c95d73c849648c406bcf1b6a0ec1cf

Frequently Asked Questions

What is CVE-2022-49212? +

In the Linux kernel, the following vulnerability has been resolved: mtd: rawnand: atmel: fix refcount issue in atmel_nand_controller_init The reference counting issue happens in several error handling paths on a refcounted object "nc->dmac". In these paths, the function simply returns the error code, forgetting to balance the reference count of "nc->dmac", increased earlier by dma_request_channel(), which may cause refcount leaks. Fix it by decrementing the refcount of specific object in those error paths. It has a CVSS v3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2022-49212? +

CVE-2022-49212 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-2022-49212? +

CVE-2022-49212 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-2022-49212? +

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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CVE-2022-49212