CVE-2022-50313: linux kernel — Fix

Description

In the Linux kernel, the following vulnerability has been resolved: erofs: fix order >= MAX_ORDER warning due to crafted negative i_size As syzbot reported [1], the root cause is that i_size field is a signed type, and negative i_size is also less than EROFS_BLKSIZ. As a consequence, it's handled as fast symlink unexpectedly. Let's fall back to the generic path to deal with such unusual i_size. [1] https://lore.kernel.org/r/[email protected]

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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	4.19 — 5.4.289
linux	linux_kernel	5.5 — 5.10.233
linux	linux_kernel	5.11 — 5.15.82
linux	linux_kernel	5.16 — 5.19.17
linux	linux_kernel	6.0 — 6.0.3

References

Advisories & Patches

https://git.kernel.org/stable/c/0ab621fcdff1a58ff4de51a8590fa92a0ecd34be https://git.kernel.org/stable/c/17a0cdbd7b0cf0fc0d7ca4187a67f8f1c18c291f https://git.kernel.org/stable/c/1dd73601a1cba37a0ed5f89a8662c90191df5873 https://git.kernel.org/stable/c/6235fb899b25fd287d5e42635ff82196395708cc https://git.kernel.org/stable/c/acc2f40b980c61a9178b72cdedd150b829064997 https://git.kernel.org/stable/c/b6c8330f5b0f22149957a2e4977fd0f01a9db7cd

Frequently Asked Questions

What is CVE-2022-50313? +

In the Linux kernel, the following vulnerability has been resolved: erofs: fix order >= MAX_ORDER warning due to crafted negative i_size As syzbot reported [1], the root cause is that i_size field is a signed type, and negative i_size is also less than EROFS_BLKSIZ. As a consequence, it's handled as fast symlink unexpectedly. Let's fall back to the generic path to deal with such unusual i_size. [1] https://lore.kernel.org/r/[email protected] It has a CVSS v3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2022-50313? +

CVE-2022-50313 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-2022-50313? +

CVE-2022-50313 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-2022-50313? +

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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