Description
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 products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
0764771dab80d7b84b9a271bee7f1b21a04a3f0c to < 132bee76097be421ab3012130b5b506324cf2be1affected0764771dab80d7b84b9a271bee7f1b21a04a3f0c to < 2581b43e162cfc43e6f5d8dd8d2b38f3441550deaffected0764771dab80d7b84b9a271bee7f1b21a04a3f0c to < 6e187281f978a2bff98ead6aa40f8ddc9a2c9afbaffected0764771dab80d7b84b9a271bee7f1b21a04a3f0c to < a4573a3838ae4fc73b70019cfa1dac9aaea7cc2faffected
Linux Linux
Default version status: affected
2.6.31affected0 to < 2.6.31unaffected6.12.113 to ≤ 6.12.*unaffected6.18.56 to ≤ 6.18.*unaffected7.2.10 to ≤ 7.2.*unaffected7.3 to ≤ *unaffected