CVE-2026-31438: Linux

Описание

Оригинално описание

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.

Засегнати продукти

• Linux Linux: cae932d3aee55035a54415dcea8e7ecf2ec469b5 преди 18c2e20b42dd21db599e42d05ddaeeb647b2bb6d; cae932d3aee55035a54415dcea8e7ecf2ec469b5 преди 4bc2d72c7695cedf6d4e1a558924903c2b28a78e; cae932d3aee55035a54415dcea8e7ecf2ec469b5 преди 00d6df7115f6972370974212de9088087820802e; cae932d3aee55035a54415dcea8e7ecf2ec469b5 преди 67e467a11f62ff64ad219dc6aa5459e132c79d14
• Linux Linux: 6.8; преди 6.8; 6.12.80 до 6.12.*; 6.18.21 до 6.18.*; 6.19.11 до 6.19.*; от 7.0 нататък

История

Други уязвимости в Linux Linux

• 8.1CVE-2026-99270
• 7.8CVE-2026-99269
• CVE-2026-99268
• CVE-2026-99266
• CVE-2026-99267

Първоизточници

• https://www.cve.org/CVERecord?id=CVE-2026-31438
• https://nvd.nist.gov/vuln/detail/CVE-2026-31438
• https://git.kernel.org/stable/c/18c2e20b42dd21db599e42d05ddaeeb647b2bb6d
• https://git.kernel.org/stable/c/4bc2d72c7695cedf6d4e1a558924903c2b28a78e
• https://git.kernel.org/stable/c/00d6df7115f6972370974212de9088087820802e
• https://git.kernel.org/stable/c/67e467a11f62ff64ad219dc6aa5459e132c79d14