CVE-2024-53235

erofs: fix file-backed mounts over FUSE

State: Published
Severity: 5.5 Medium
Published: Dec 27, 2024
Updated: May 11, 2026
Reserved: Nov 19, 2024

Description

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

erofs: fix file-backed mounts over FUSE

syzbot reported a null-ptr-deref in fuse_read_args_fill: fuse_read_folio+0xb0/0x100 fs/fuse/file.c:905 filemap_read_folio+0xc6/0x2a0 mm/filemap.c:2367 do_read_cache_folio+0x263/0x5c0 mm/filemap.c:3825 read_mapping_folio include/linux/pagemap.h:1011 [inline] erofs_bread+0x34d/0x7e0 fs/erofs/data.c:41 erofs_read_superblock fs/erofs/super.c:281 [inline] erofs_fc_fill_super+0x2b9/0x2500 fs/erofs/super.c:625

Unlike most filesystems, some network filesystems and FUSE need unavoidable valid `file` pointers for their read I/Os [1]. Anyway, those use cases need to be supported too.

[1] https://docs.kernel.org/filesystems/vfs.html

Scores

CVSS	Score	Vector	Source
3.1	5.5 Medium	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H	CISA-ADP

Weaknesses

CWE-476 NULL Pointer Dereference

Affected Products

Product	Versions
LinuxLinux	fb176750266a3d7f42ebdcf28e8ba40350b27847 to before 5036f2f024cac40a02ea6ea70de2c3a4407d16bcAffected fb176750266a3d7f42ebdcf28e8ba40350b27847 to before 3a23787ca8756920d65fda39f41353a4be1d1642Affected
LinuxLinux	6.12Affected before 6.12Not affected 6.12.2 through 6.12.*Not affected 6.13 and laterNot affected

References

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