{"id":"CVE-2026-98937","published":"2026-10-23T13:17:14.613","lastModified":"2026-10-26T07:17:17.870","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nperf/core: Check kernel access when kernel callchains are requested\n\nperf_event_open() currently gates perf_allow_kernel() only on\n!attr.exclude_kernel.\n\nHowever, users can still request kernel callchain collection with\nattr.exclude_callchain_kernel == 0 even when attr.exclude_kernel == 1.\nThat still requires kernel profiling privilege, but the existing check\ndoes not enforce it.\n\nUpdate the permission check to call perf_allow_kernel() when either\nkernel sampling is requested or kernel callchains are requested.\n\nThis keeps permission checks aligned with requested data and prevents\nunprivileged use of kernel callchain capture.","cvssScore":null,"cvssSeverity":null,"cvssVector":null,"cwes":[],"vendors":[],"products":[],"references":[{"url":"https://git.kernel.org/stable/c/132bee76097be421ab3012130b5b506324cf2be1","tags":[]},{"url":"https://git.kernel.org/stable/c/2581b43e162cfc43e6f5d8dd8d2b38f3441550de","tags":[]},{"url":"https://git.kernel.org/stable/c/6e187281f978a2bff98ead6aa40f8ddc9a2c9afb","tags":[]},{"url":"https://git.kernel.org/stable/c/a4573a3838ae4fc73b70019cfa1dac9aaea7cc2f","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":null}