CVE-2023-52444

Summary

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]

Affected Software

VendorProductVersion RangeStatus
LinuxLinux7e01e7ad746bc8198a8b46163ddc73a1c7d22339 < 02160112e6d45c2610b049df6eb693d7a2e57b46affected
LinuxLinux7e01e7ad746bc8198a8b46163ddc73a1c7d22339 < 5624a3c1b1ebc8991318e1cce2aa719542991024affected
LinuxLinux7e01e7ad746bc8198a8b46163ddc73a1c7d22339 < 6f866885e147d33efc497f1095f35b2ee5ec7310affected
LinuxLinux7e01e7ad746bc8198a8b46163ddc73a1c7d22339 < f100ba617d8be6c98a68f3744ef7617082975b77affected
LinuxLinux7e01e7ad746bc8198a8b46163ddc73a1c7d22339 < f0145860c20be6bae6785c7a2249577674702ac7affected
LinuxLinux7e01e7ad746bc8198a8b46163ddc73a1c7d22339 < d3c0b49aaa12a61d560528f5d605029ab57f0728affected
LinuxLinux7e01e7ad746bc8198a8b46163ddc73a1c7d22339 < 2fb4867f4405aea8c0519d7d188207f232a57862affected
LinuxLinux7e01e7ad746bc8198a8b46163ddc73a1c7d22339 < 53edb549565f55ccd0bdf43be3d66ce4c2d48b28affected
LinuxLinux4.2affected
LinuxLinux0 < 4.2unaffected
LinuxLinux4.19.306 <= 4.19.*unaffected
LinuxLinux5.4.268 <= 5.4.*unaffected
LinuxLinux5.10.209 <= 5.10.*unaffected
LinuxLinux5.15.148 <= 5.15.*unaffected
LinuxLinux6.1.75 <= 6.1.*unaffected
LinuxLinux6.6.14 <= 6.6.*unaffected
LinuxLinux6.7.2 <= 6.7.*unaffected
LinuxLinux6.8 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

CVE Program Container

Additional References

References