CVE-2023-52444

high

Description

In the Linux kernel, the following vulnerability has been resolved: f2fs: fix to avoid dirent corruption As Al reported in link[1]: f2fs_rename() ... if (old_dir != new_dir && !whiteout) f2fs_set_link(old_inode, old_dir_entry, old_dir_page, new_dir); else f2fs_put_page(old_dir_page, 0); You want correct inumber in the ".." link. And cross-directory rename does move the source to new parent, even if you'd been asked to leave a whiteout in the old place. [1] https://lore.kernel.org/all/20231017055040.GN800259@ZenIV/ With below testcase, it may cause dirent corruption, due to it missed to call f2fs_set_link() to update ".." link to new directory. - mkdir -p dir/foo - renameat2 -w dir/foo bar [ASSERT] (__chk_dots_dentries:1421) --> Bad inode number[0x4] for '..', parent parent ino is [0x3] [FSCK] other corrupted bugs [Fail]

References

https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html

https://lists.debian.org/debian-lts-announce/2024/06/msg00016.html

https://git.kernel.org/stable/c/f100ba617d8be6c98a68f3744ef7617082975b77

https://git.kernel.org/stable/c/f0145860c20be6bae6785c7a2249577674702ac7

https://git.kernel.org/stable/c/d3c0b49aaa12a61d560528f5d605029ab57f0728

https://git.kernel.org/stable/c/6f866885e147d33efc497f1095f35b2ee5ec7310

https://git.kernel.org/stable/c/5624a3c1b1ebc8991318e1cce2aa719542991024

https://git.kernel.org/stable/c/53edb549565f55ccd0bdf43be3d66ce4c2d48b28

https://git.kernel.org/stable/c/2fb4867f4405aea8c0519d7d188207f232a57862

https://git.kernel.org/stable/c/02160112e6d45c2610b049df6eb693d7a2e57b46

Details

Source: Mitre, NVD

Published: 2024-02-22

Updated: 2024-06-27

Risk Information

CVSS v2

Base Score: 6.8

Vector: CVSS2#AV:L/AC:L/Au:S/C:C/I:C/A:C

Severity: Medium

CVSS v3

Base Score: 7.8

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Severity: High