CVE-2026-31438
In the Linux kernel, the following vulnerability has been resolved: netfs: Fix kernel BUG in netfs_limit_iter() for ITER_KVEC iterators When a process crashes …
Impact
In the Linux kernel, the following vulnerability has been resolved: netfs: Fix kernel BUG in netfs_limit_iter() for ITER_KVEC iterators When a process crashes and the kernel writes a core dump to a 9P filesystem, __kernel_write() creates an ITER_KVEC iterator. This iterator reaches netfs_limit_iter() via netfs_unbuffered_write(), which only handles ITER_FOLIOQ, ITER_BVEC and ITER_XARRAY iterator types, hitting the BUG() for any other type. Fix this by adding netfs_limit_kvec() following the same pattern as netfs_limit_bvec(), since both kvec and bvec are simple segment arrays with pointer and length fields. Dispatch it from netfs_limit_iter() when the iterator type is ITER_KVEC.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Linux | Linux Kernel | from 6.8 before 6.12.80 from 6.13 before 6.18.21 from 6.19 before 6.19.11 Version 7.0 |
Weakness classification
References
- NVD record
- CVE.org record
- https://git.kernel.org/stable/c/00d6df7115f6972370974212de9088087820802e
- https://git.kernel.org/stable/c/18c2e20b42dd21db599e42d05ddaeeb647b2bb6d
- https://git.kernel.org/stable/c/4bc2d72c7695cedf6d4e1a558924903c2b28a78e
- https://git.kernel.org/stable/c/67e467a11f62ff64ad219dc6aa5459e132c79d14