CVE-2022-49914

btrfs: fix inode list leak during backref walking at resolve_indirect_refs()

Description

In the Linux kernel, the following vulnerability has been resolved: btrfs: fix inode list leak during backref walking at resolve_indirect_refs() During backref walking, at resolve_indirect_refs(), if we get an error we jump to the 'out' label and call ulist_free() on the 'parents' ulist, which frees all the elements in the ulist - however that does not free any inode lists that may be attached to elements, through the 'aux' field of a ulist node, so we end up leaking lists if we have any attached to the unodes. Fix this by calling free_leaf_list() instead of ulist_free() when we exit from resolve_indirect_refs(). The static function free_leaf_list() is moved up for this to be possible and it's slightly simplified by removing unnecessary code.

N/A

CVSS

Severity:

EPSS 0.03%

Affected: Linux Linux

References

Link	Tags
https://git.kernel.org/stable/c/b1dc9019bb5f89abae85645de1a2dd4830c1f8e9
https://git.kernel.org/stable/c/cded2c89774b99b67c98147ae103ea878c92a206
https://git.kernel.org/stable/c/2c0329406bb28109c07c6e23e5e3e0fa618a95d7
https://git.kernel.org/stable/c/a52e24c7fcc3c5ce3588a14e3663c00868d36623
https://git.kernel.org/stable/c/6ba3479f9e96b9ad460c7e77abc26dd16e5dec4f
https://git.kernel.org/stable/c/396515db923ad5cbeb179d6b88927870b4cbebb7
https://git.kernel.org/stable/c/5614dc3a47e3310fbc77ea3b67eaadd1c6417bf1

Frequently Asked Questions

What is the severity of CVE-2022-49914?: CVE-2022-49914 has not yet been assigned a CVSS score.
How to fix CVE-2022-49914?: To fix CVE-2022-49914, 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-2022-49914 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2022-49914 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-2022-49914?: CVE-2022-49914 affects Linux Linux, Linux Linux.

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