CVE-2023-52444High· 7.8▾ TwilightIn 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, …
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 42.9 · likelihood 0 · exploitation 0
Need a working PoC? Pro members can cast a request and our team develops one — it lands right here.
Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.
Exploit-prediction probability, daily snapshots since Aug 4.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
0.2%
Last analysed / modified upstream
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.
[ASSERT] (__chk_dots_dentries:1421) --> Bad inode number[0x4] for '..', parent parent ino is [0x3] [FSCK] other corrupted bugs [Fail]
linux_kernel >= 4.2.0, < 4.19.306linux_kernel >= 4.20, < 5.4.268linux_kernel >= 5.5.0, < 5.10.209linux_kernel >= 5.11.0, < 5.15.148linux_kernel >= 5.16.0, < 6.1.75linux_kernel >= 6.2.0, < 6.6.14linux_kernel >= 6.7.0, < 6.7.2Upgrade past the affected range:
linux_kernel 6.7.2Connected by shared product, vendor, weakness, or advisory.
CVE-2022-3625Medium· 4.6A vulnerability was found in Linux Kernel
CVE-2022-3545Medium· 5.5A vulnerability has been found in Linux Kernel and classified as critical
CVE-2022-3564Medium· 5.5A vulnerability classified as critical was found in Linux Kernel
CVE-2022-3565Medium· 4.6A vulnerability, which was classified as critical, has been found in Linux Kernel
CVE-2021-44879Medium· 5.5In gc_data_segment in fs/f2fs/gc.c in the Linux kernel before 5.16.3, special files are not considered, leading to a move_data_page NULL pointer dereference.
CVE-2022-0500High· 7.8A flaw was found in unrestricted eBPF usage by the BPF_BTF_LOAD, leading to a possible out-of-bounds memory write in the Linux kernel’s BPF subsystem due to the way a user loads BTF