CVE-2022-49408

ext4: fix memory leak in parse_apply_sb_mount_options()

Description

In the Linux kernel, the following vulnerability has been resolved: ext4: fix memory leak in parse_apply_sb_mount_options() If processing the on-disk mount options fails after any memory was allocated in the ext4_fs_context, e.g. s_qf_names, then this memory is leaked. Fix this by calling ext4_fc_free() instead of kfree() directly. Reproducer: mkfs.ext4 -F /dev/vdc tune2fs /dev/vdc -E mount_opts=usrjquota=file echo clear > /sys/kernel/debug/kmemleak mount /dev/vdc /vdc echo scan > /sys/kernel/debug/kmemleak sleep 5 echo scan > /sys/kernel/debug/kmemleak cat /sys/kernel/debug/kmemleak

Category

5.5
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.02%
Affected: Linux Linux
Affected: Linux Linux
Published at:
Updated at:

References

Link Tags
https://git.kernel.org/stable/c/9ea3e6168948189cec31d0678d2b55b395f88491 patch
https://git.kernel.org/stable/c/f92ded66e9d0aa20b883a2a5183973abc8f41815 patch
https://git.kernel.org/stable/c/c069db76ed7b681c69159f44be96d2137e9ca989 patch

Frequently Asked Questions

What is the severity of CVE-2022-49408?
CVE-2022-49408 has been scored as a medium severity vulnerability.
How to fix CVE-2022-49408?
To fix CVE-2022-49408, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2022-49408 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2022-49408 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2022-49408?
CVE-2022-49408 affects Linux Linux, Linux Linux.
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