{"id":"CVE-2026-98477","revision":"e41497c4f3024f14ba79053074714a2b","records":[{"revision":"e41497c4f3024f14ba79053074714a2b","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-98477","aliases":[],"title":"perf/core: Fix NULL pmu_ctx passed to pmu->sched_task()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nperf/core: Fix NULL pmu_ctx passed to pmu->sched_task()\n\nperf_pmu_sched_task() returns early when cpuctx->task_ctx is set, and\ncpc->task_epc is only non-NULL while a task context is scheduled in on\nthis CPU. __perf_pmu_sched_task() therefore always passes NULL:\n\n  Unable to handle kernel NULL pointer dereference at virtual address 00\n  pc : armv8pmu_sched_task+0x14/0x50\n  Call trace:\n   armv8pmu_sched_task+0x14/0x50 (P)\n   perf_pmu_sched_task+0xac/0x108\n   __perf_event_task_sched_out+0x6c/0xe0\n\nPass &cpc->epc instead, the CPU-wide context for this PMU, which the\nfunction already dereferences a few lines up to find pmu.\n\narmv8pmu_sched_task() is the only in-tree implementation that\ndereferences the argument, and it only reads ->pmu, so the oops needs\nBRBE, added in v6.17.","state":0,"publishedAt":"2026-10-18T15:15:51.475+00:00","modifiedAt":"2026-10-21T12:55:10.17+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"kernel/events/core.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"bd27568117664b8b3e259721393df420ed51f57b\",\n                            \"lessThan\": \"98181f9721f75f1a544dc563b0d8fed1d5c398d5\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"bd27568117664b8b3e259721393df420ed51f57b\",\n                            \"lessThan\": \"b5409311b606d536cc485f3706c242c2afa93edb\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"bd27568117664b8b3e259721393df420ed51f57b\",\n                            \"lessThan\": \"249a2bd87a0e57dc28f36e992807edc9cae309b5\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"bd27568117664b8b3e259721393df420ed51f57b\",\n                            \"lessThan\": \"ec15f6a50183fc01f470af74ad49900fb3731fca\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"bd27568117664b8b3e259721393df420ed51f57b\",\n                            \"lessThan\": \"36bb85cf36cab15fb611cb44b78a5df06e4e69a2\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"kernel/events/core.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"6.2\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"6.2\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.160\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.112\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.55\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.9\",\n                            \"lessThanOrEqual\": \"7.2.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.3\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[],"references":["https://git.kernel.org/stable/c/98181f9721f75f1a544dc563b0d8fed1d5c398d5","https://git.kernel.org/stable/c/b5409311b606d536cc485f3706c242c2afa93edb","https://git.kernel.org/stable/c/249a2bd87a0e57dc28f36e992807edc9cae309b5","https://git.kernel.org/stable/c/ec15f6a50183fc01f470af74ad49900fb3731fca","https://git.kernel.org/stable/c/36bb85cf36cab15fb611cb44b78a5df06e4e69a2"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-98477","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-98477","identifiers":["CVE-2026-98477"]},"retained":false,"historicalAffected":[]}],"coverage":[]}