Description

In the Linux kernel, the following vulnerability has been resolved:

f2fs: get rid of online repaire on corrupted directory

syzbot reports a f2fs bug as below:

kernel BUG at fs/f2fs/inode.c:896!
RIP: 0010:f2fs_evict_inode+0x1598/0x15c0 fs/f2fs/inode.c:896
Call Trace:
evict+0x532/0x950 fs/inode.c:704
dispose_list fs/inode.c:747 [inline]
evict_inodes+0x5f9/0x690 fs/inode.c:797
generic_shutdown_super+0x9d/0x2d0 fs/super.c:627
kill_block_super+0x44/0x90 fs/super.c:1696
kill_f2fs_super+0x344/0x690 fs/f2fs/super.c:4898
deactivate_locked_super+0xc4/0x130 fs/super.c:473
cleanup_mnt+0x41f/0x4b0 fs/namespace.c:1373
task_work_run+0x24f/0x310 kernel/task_work.c:228
ptrace_notify+0x2d2/0x380 kernel/signal.c:2402
ptrace_report_syscall include/linux/ptrace.h:415 [inline]
ptrace_report_syscall_exit include/linux/ptrace.h:477 [inline]
syscall_exit_work+0xc6/0x190 kernel/entry/common.c:173
syscall_exit_to_user_mode_prepare kernel/entry/common.c:200 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:205 [inline]
syscall_exit_to_user_mode+0x279/0x370 kernel/entry/common.c:218
do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0010:f2fs_evict_inode+0x1598/0x15c0 fs/f2fs/inode.c:896

Online repaire on corrupted directory in f2fs_lookup() can generate
dirty data/meta while racing w/ readonly remount, it may leave dirty
inode after filesystem becomes readonly, however, checkpoint() will
skips flushing dirty inode in ...

Classification

CVE ID: CVE-2024-47690

CVSS Base Severity: MEDIUM

CVSS Base Score: 5.5

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

Affected Products

Vendor: Linux

Product: Linux

Exploit Prediction Scoring System (EPSS)

EPSS Score: 0.04% (probability of being exploited)

EPSS Percentile: 10.17% (scored less or equal to compared to others)

EPSS Date: 2025-06-02 (when was this score calculated)

Stakeholder-Specific Vulnerability Categorization (SSVC)

SSVC Exploitation: none

SSVC Technical Impact: partial

SSVC Automatable: false

References

https://nvd.nist.gov/vuln/detail/CVE-2024-47690
https://git.kernel.org/stable/c/e8d64f598eeb079c42a52deaa3a91312c736a49d
https://git.kernel.org/stable/c/f4746f2d79507f65cfbde11d3c39ee8338aa50af
https://git.kernel.org/stable/c/f9ce2f550d53d044ecfb5ce996406cf42cd6b84d
https://git.kernel.org/stable/c/8be95cd607478d85fa4626e86f811e785905bcbf
https://git.kernel.org/stable/c/bcefd0b0611f35b560d0a7281d87529fbe7a1e32
https://git.kernel.org/stable/c/884ee6dc85b959bc152f15bca80c30f06069e6c4

Timeline