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

tracing/syscalls: Use copy_from_user for the faultable syscall buffer

syscall_copy_user_array() copies the buffer argument of faultable
syscalls (write, pwrite64, ...) with __copy_from_user(), which skips
access_ok(). Use copy_from_user() instead so a non-user address is
rejected and the entry is recorded as faulted.

It could be a security concern for machines that trust perf a bit too
much.
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Tue, 03 Nov 2026 19:30:00 +0000


Mon, 02 Nov 2026 19:30:00 +0000

Type Values Removed Values Added
First Time appeared Linux linux
Vendors & Products Linux linux

Mon, 02 Nov 2026 19:00:00 +0000

Type Values Removed Values Added
Weaknesses CWE-787

Mon, 02 Nov 2026 16:15:00 +0000

Type Values Removed Values Added
Description In the Linux kernel, the following vulnerability has been resolved: tracing/syscalls: Use copy_from_user for the faultable syscall buffer syscall_copy_user_array() copies the buffer argument of faultable syscalls (write, pwrite64, ...) with __copy_from_user(), which skips access_ok(). Use copy_from_user() instead so a non-user address is rejected and the entry is recorded as faulted. It could be a security concern for machines that trust perf a bit too much.
Title tracing/syscalls: Use copy_from_user for the faultable syscall buffer
First Time appeared Linux
Linux linux Kernel
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel
References

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2026-11-03T19:13:01.998Z

Reserved: 2026-09-25T10:25:14.402Z

Link: CVE-2026-99232

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-11-02T16:17:48.247

Modified: 2026-11-03T20:18:29.153

Link: CVE-2026-99232

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-11-02T19:15:16Z

Weaknesses