CVE-2023-52444

HIGH
Published Feb 22, 2024 Modified Nov 21, 2024 CWE-119

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]

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CVSS v3.1 Score

7.8
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness Type (CWE)

CWE-119 Buffer Overflow

Affected Products

Vendor Product
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel

References

Advisories & Patches

https://git.kernel.org/stable/c/02160112e6d45c2610b049df6eb693d7a2e57b46 https://git.kernel.org/stable/c/2fb4867f4405aea8c0519d7d188207f232a57862 https://git.kernel.org/stable/c/53edb549565f55ccd0bdf43be3d66ce4c2d48b28 https://git.kernel.org/stable/c/5624a3c1b1ebc8991318e1cce2aa719542991024 https://git.kernel.org/stable/c/6f866885e147d33efc497f1095f35b2ee5ec7310 https://git.kernel.org/stable/c/d3c0b49aaa12a61d560528f5d605029ab57f0728 https://git.kernel.org/stable/c/f0145860c20be6bae6785c7a2249577674702ac7 https://git.kernel.org/stable/c/f100ba617d8be6c98a68f3744ef7617082975b77 https://git.kernel.org/stable/c/02160112e6d45c2610b049df6eb693d7a2e57b46 https://git.kernel.org/stable/c/2fb4867f4405aea8c0519d7d188207f232a57862 https://git.kernel.org/stable/c/53edb549565f55ccd0bdf43be3d66ce4c2d48b28 https://git.kernel.org/stable/c/5624a3c1b1ebc8991318e1cce2aa719542991024 https://git.kernel.org/stable/c/6f866885e147d33efc497f1095f35b2ee5ec7310 https://git.kernel.org/stable/c/d3c0b49aaa12a61d560528f5d605029ab57f0728 https://git.kernel.org/stable/c/f0145860c20be6bae6785c7a2249577674702ac7 https://git.kernel.org/stable/c/f100ba617d8be6c98a68f3744ef7617082975b77

Frequently Asked Questions

What is CVE-2023-52444? +
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] It has a CVSS v3.1 base score of 7.8 (HIGH).
How severe is CVE-2023-52444? +
CVE-2023-52444 has a CVSS v3.1 score of 7.8 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.
What products are affected by CVE-2023-52444? +
CVE-2023-52444 affects products from linux, specifically: linux_kernel. Check the affected products table above for specific version ranges.
How do I check if I'm vulnerable to CVE-2023-52444? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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