CVE-2025-68767

Summary

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

hfsplus: Verify inode mode when loading from disk

syzbot is reporting that S_IFMT bits of inode->i_mode can become bogus when the S_IFMT bits of the 16bits "mode" field loaded from disk are corrupted.

According to [1], the permissions field was treated as reserved in Mac OS 8 and 9. According to [2], the reserved field was explicitly initialized with 0, and that field must remain 0 as long as reserved. Therefore, when the "mode" field is not 0 (i.e. no longer reserved), the file must be S_IFDIR if dir == 1, and the file must be one of S_IFREG/S_IFLNK/S_IFCHR/ S_IFBLK/S_IFIFO/S_IFSOCK if dir == 0.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 6f768724aabd5b321c5b8f15acdca11e4781cf32affected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < d92333c7a35856e419500e7eed72dac1afa404a5affected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 001f44982587ad462b3002ee40c75e8df67d597daffected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 05ec9af3cc430683c97f76027e1c55ac6fd25c59affected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < edfb2e602b5ba5ca6bf31cbac20b366efb72b156affected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 91f114bffa36ce56d0e1f60a0a44fc09baaefc79affected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 005d4b0d33f6b4a23d382b7930f7a96b95b01f39affected
LinuxLinux2.6.12affected
LinuxLinux0 < 2.6.12unaffected
LinuxLinux5.10.248 <= 5.10.*unaffected
LinuxLinux5.15.198 <= 5.15.*unaffected
LinuxLinux6.1.160 <= 6.1.*unaffected
LinuxLinux6.6.120 <= 6.6.*unaffected
LinuxLinux6.12.64 <= 6.12.*unaffected
LinuxLinux6.18.3 <= 6.18.*unaffected
LinuxLinux6.19 <= *unaffected

Weaknesses

References