CVE-2022-50436: linux kernel — Fix

Description

In the Linux kernel, the following vulnerability has been resolved: ext4: don't set up encryption key during jbd2 transaction Commit a80f7fcf1867 ("ext4: fixup ext4_fc_track_* functions' signature") extended the scope of the transaction in ext4_unlink() too far, making it include the call to ext4_find_entry(). However, ext4_find_entry() can deadlock when called from within a transaction because it may need to set up the directory's encryption key. Fix this by restoring the transaction to its original scope.

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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	5.10.1 — 5.10.163
linux	linux_kernel	5.11 — 5.15.87
linux	linux_kernel	5.16 — 6.0.18
linux	linux_kernel	6.1 — 6.1.4
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/1ba993208bcfd691e241483420a2a761d3f15750 https://git.kernel.org/stable/c/206dd3acfb9bca54a25b228c7c7c2257eedde09b https://git.kernel.org/stable/c/23ad034760dd38e12b0e0e1b28b9629f330810a1 https://git.kernel.org/stable/c/4c0d5778385cb3618ff26a561ce41de2b7d9de70 https://git.kernel.org/stable/c/6220ec405571ded17efedc56587190b542adf246

Frequently Asked Questions

What is CVE-2022-50436? +

In the Linux kernel, the following vulnerability has been resolved: ext4: don't set up encryption key during jbd2 transaction Commit a80f7fcf1867 ("ext4: fixup ext4_fc_track_* functions' signature") extended the scope of the transaction in ext4_unlink() too far, making it include the call to ext4_find_entry(). However, ext4_find_entry() can deadlock when called from within a transaction because it may need to set up the directory's encryption key. Fix this by restoring the transaction to its original scope. It has a CVSS v3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2022-50436? +

CVE-2022-50436 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-2022-50436? +

CVE-2022-50436 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-2022-50436? +

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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