CVE-2022-49849

btrfs: fix match incorrectly in dev_args_match_device

Description

In the Linux kernel, the following vulnerability has been resolved: btrfs: fix match incorrectly in dev_args_match_device syzkaller found a failed assertion: assertion failed: (args->devid != (u64)-1) || args->missing, in fs/btrfs/volumes.c:6921 This can be triggered when we set devid to (u64)-1 by ioctl. In this case, the match of devid will be skipped and the match of device may succeed incorrectly. Patch 562d7b1512f7 introduced this function which is used to match device. This function contains two matching scenarios, we can distinguish them by checking the value of args->missing rather than check whether args->devid and args->uuid is default value.

N/A

CVSS

Severity:

EPSS 0.02%

Affected: Linux Linux

References

Link	Tags
https://git.kernel.org/stable/c/c9fe4719c662e0af17eea723cf345e37719fd3c9
https://git.kernel.org/stable/c/bc6c127c377010f136360552ebf91c2723081c1b
https://git.kernel.org/stable/c/0fca385d6ebc3cabb20f67bcf8a71f1448bdc001

Frequently Asked Questions

What is the severity of CVE-2022-49849?: CVE-2022-49849 has not yet been assigned a CVSS score.
How to fix CVE-2022-49849?: To fix CVE-2022-49849, 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-2022-49849 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2022-49849 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-2022-49849?: CVE-2022-49849 affects Linux Linux, Linux Linux.

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