CVE-2026-64361

Summary

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

hfs/hfsplus: fix u32 overflow in check_and_correct_requested_length

check_and_correct_requested_length() compares (off + len) against node_size using u32 arithmetic. When the caller passes a large len value (e.g. from an underflowed subtraction in hfs_brec_remove()), off + len can wrap past 2^32 and produce a small result, causing the bounds check to pass when it should fail.

For example, with off=14 and len=0xFFFFFFF2 (underflowed from data_off - keyoffset - size in hfs_brec_remove), off + len wraps to 6, which is less than a typical node_size of 512, so the check passes and the subsequent memmove reads ~4GB past the node buffer.

Fix this by widening the addition to u64 before comparing against node_size. This prevents the u32 wrap while keeping the logic straightforward.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux67ecc81f6492275c9c54280532f558483c99c90e < c8dd112173c02adf539fe2ad34a45f5e0068780daffected
LinuxLinuxa1a60e79502279f996e55052f50cc14919020475 < fc9d1447ca3cdc78d2e4ace1ce1f3a7c77ca08b1affected
LinuxLinuxfe2891a9c43ab87d1a210d61e6438ca6936e2f62 < 671c3fcc2ad31c1311ea6414382a2d95104ae1b9affected
LinuxLinux384a66b89f9540a9a8cb0f48807697dfabaece4c < b6a481642ea1977be2f84dc08c5affd742c177e7affected
LinuxLinuxefc095b35b23297e419c2ab4fc1ed1a8f0781a29 < 7399c3baee7bb622a92f0b895cd4d3009a693f2baffected
LinuxLinuxa431930c9bac518bf99d6b1da526a7f37ddee8d8 < 607217f7ad419b53926f71e3f75001813bbc08adaffected
LinuxLinuxa431930c9bac518bf99d6b1da526a7f37ddee8d8 < c25d3c931a63e762fcaa9cb125b901c53b62403faffected
LinuxLinuxa431930c9bac518bf99d6b1da526a7f37ddee8d8 < 966cb76fb2857a4242cab6ea2ea17acf818a3da7affected
LinuxLinuxe7d2dc2421e821e4045775e6dc226378328de6f6affected
LinuxLinuxfc7f732984ec91f30be3e574e0644066d07f2b78affected
LinuxLinuxeec522fd0d28106b14a59ab2d658605febe4a3bbaffected
LinuxLinux5.10.241 < 5.10.261affected
LinuxLinux5.15.190 < 5.15.212affected
LinuxLinux6.1.149 < 6.1.178affected
LinuxLinux6.6.103 < 6.6.145affected
LinuxLinux6.12.43 < 6.12.97affected
LinuxLinux5.4.297 < 5.5affected
LinuxLinux6.15.11 < 6.16affected
LinuxLinux6.16.2 < 6.17affected
LinuxLinux6.17affected
LinuxLinux0 < 6.17unaffected
LinuxLinux5.10.261 <= 5.10.*unaffected
LinuxLinux5.15.212 <= 5.15.*unaffected
LinuxLinux6.1.178 <= 6.1.*unaffected
LinuxLinux6.6.145 <= 6.6.*unaffected
LinuxLinux6.12.97 <= 6.12.*unaffected
LinuxLinux6.18.40 <= 6.18.*unaffected
LinuxLinux7.1.4 <= 7.1.*unaffected
LinuxLinux7.2-rc1 <= *unaffected

Weaknesses

References