Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: perf/core: Check kernel access when kernel callchains are requested perf_event_open() currently gates perf_allow_kernel() only on !attr.exclude_kernel. However, users can still request kernel callchain collection with attr.exclude_callchain_kernel == 0 even when attr.exclude_kernel == 1. That still requires kernel profiling privilege, but the existing check does not enforce it. Update the permission check to call perf_allow_kernel() when either kernel sampling is requested or kernel callchains are requested. This keeps permission checks aligned with requested data and prevents unprivileged use of kernel callchain capture.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 132bee76097be421ab3012130b5b506324cf2be1; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 2581b43e162cfc43e6f5d8dd8d2b38f3441550de; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 6e187281f978a2bff98ead6aa40f8ddc9a2c9afb; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before a4573a3838ae4fc73b70019cfa1dac9aaea7cc2f; affected 0 before 6.12.113; affected 0 before 6.18.56; affected 0 before 7.2.10 |
| Linux / Linux | unaffected 6.12.113 through 6.12.*; unaffected 6.18.56 through 6.18.*; unaffected 7.2.10 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.