Information disclosure in Linux kernel btrfs

1) Information disclosure

EUVDB-ID: #VU91343

Risk: Low

CVSSv3.1: 2.9 [AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2024-35956

CWE-ID: CWE-200 - Information exposure

Exploit availability: No

Description

The vulnerability allows a local user to gain access to sensitive information.

The vulnerability exists due to information disclosure within the btrfs_subvolume_reserve_metadata() function in fs/btrfs/root-tree.c, within the create_subvol() and create_snapshot() functions in fs/btrfs/ioctl.c, within the btrfs_delete_subvolume() and btrfs_end_transaction() functions in fs/btrfs/inode.c. A local user can gain access to sensitive information.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: All versions

External links

http://git.kernel.org/stable/c/14431815a4ae4bcd7c7a68b6a64c66c7712d27c9
http://git.kernel.org/stable/c/6c95336f5d8eb9ab79cd7306d71b6d0477363f8c
http://git.kernel.org/stable/c/74e97958121aa1f5854da6effba70143f051b0cd

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.