CVE-2022-49996: btrfs: fix possible memory leak in btrfs_get_dev_args_from_path()

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-06-18 · updated 2026-06-17
Weakness: CWE-401

Description

In the Linux kernel, the following vulnerability has been resolved: btrfs: fix possible memory leak in btrfs_get_dev_args_from_path() In btrfs_get_dev_args_from_path(), btrfs_get_bdev_and_sb() can fail if the path is invalid. In this case, btrfs_get_dev_args_from_path() returns directly without freeing args->uuid and args->fsid allocated before, which causes memory leak. To fix these possible leaks, when btrfs_get_bdev_and_sb() fails, btrfs_put_dev_args_from_path() is called to clean up the memory.

Affected products

Linux kernel: from 5.15.54 before 5.15.64; from 5.16 before 5.19.6; 6.0-rc1, 6.0-rc2 — fixed in 5.15.64, 5.19.6

How to fix

Upgrade to a fixed version: Linux kernel 5.15.64, 5.19.6. Check the vendor advisory for mitigations.

References

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