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.
References
Configurations
Configuration 1 (hide)
|
History
19 May 2026, 22:08
| Type | Values Removed | Values Added |
|---|---|---|
| CPE | cpe:2.3:o:linux:linux_kernel:7.0:rc6:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.0:rc5:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:* |
|
| CWE | CWE-476 | |
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 5.5 |
| First Time |
Linux linux Kernel
Linux |
|
| References | () https://git.kernel.org/stable/c/00d6df7115f6972370974212de9088087820802e - Patch | |
| References | () https://git.kernel.org/stable/c/18c2e20b42dd21db599e42d05ddaeeb647b2bb6d - Patch | |
| References | () https://git.kernel.org/stable/c/4bc2d72c7695cedf6d4e1a558924903c2b28a78e - Patch | |
| References | () https://git.kernel.org/stable/c/67e467a11f62ff64ad219dc6aa5459e132c79d14 - Patch |
22 Apr 2026, 14:16
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-04-22 14:16
Updated : 2026-05-19 22:08
NVD link : CVE-2026-31438
Mitre link : CVE-2026-31438
CVE.ORG link : CVE-2026-31438
JSON object : View
Products Affected
linux
- linux_kernel
CWE
CWE-476
NULL Pointer Dereference