CVE-2022-49361Medium· 5.5▾ SunlitIn the Linux kernel, the following vulnerability has been resolved: f2fs: fix to do sanity check for inline inode Yanming reported a kernel bug in Bugzilla kernel [1], which can be reproduced. The bug message is: The kernel message is…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 30.3 · likelihood 0.1 · exploitation 0
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Exploit-prediction probability, daily snapshots since Aug 15.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
Last analysed / modified upstream
0.3%
0.3% → 0.3%
In the Linux kernel, the following vulnerability has been resolved:
f2fs: fix to do sanity check for inline inode
Yanming reported a kernel bug in Bugzilla kernel [1], which can be reproduced. The bug message is:
The kernel message is shown below:
kernel BUG at fs/inode.c:611! Call Trace: evict+0x282/0x4e0 __dentry_kill+0x2b2/0x4d0 dput+0x2dd/0x720 do_renameat2+0x596/0x970 __x64_sys_rename+0x78/0x90 do_syscall_64+0x3b/0x90
[1] https://bugzilla.kernel.org/show_bug.cgi?id=215895
The bug is due to fuzzed inode has both inline_data and encrypted flags. During f2fs_evict_inode(), as the inode was deleted by rename(), it will cause inline data conversion due to conflicting flags. The page cache will be polluted and the panic will be triggered in clear_inode().
Try fixing the bug by doing more sanity checks for inline data inode in sanity_check_inode().
linux_kernel >= 3.8, < 5.10.121linux_kernel >= 5.11, < 5.15.46linux_kernel >= 5.16, < 5.17.14linux_kernel >= 5.18, < 5.18.3Upgrade past the affected range:
linux_kernel 5.18.3Connected by shared product, vendor, weakness, or advisory.
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