# CVE-2023-52444: linux: In the Linux kernel, the following vulnerability has been resolved:  f2fs: fix to avoid dirent corruption  As Al repo...

CVE-2023-52444 is fixed in linux on 1 platform, first by DEBIAN-CVE-2023-52444, released February 22, 2024. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2023-52444
- Priority: High
- CVSS: 7.8 (high)
- EPSS: 0.0025
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Feb 22, 2024

## 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]

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 6.1.76-1 | [DEBIAN-CVE-2023-52444](https://patchblox.com/security/data/fix/linux/debian-cve-2023-52444.md) | Feb 22, 2024 |
| Linux | linux Debian 13.5 (trixie) | 6.6.15-1 | [DEBIAN-CVE-2023-52444](https://patchblox.com/security/data/fix/linux/debian-cve-2023-52444.md) | Feb 22, 2024 |
| Linux | linux Debian 14 | 6.6.15-1 | [DEBIAN-CVE-2023-52444](https://patchblox.com/security/data/fix/linux/debian-cve-2023-52444.md) | Feb 22, 2024 |

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