{"id":40949,"date":"2026-10-19T00:31:39","date_gmt":"2026-10-18T16:31:39","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-98477"},"modified":"2026-10-19T00:31:39","modified_gmt":"2026-10-18T16:31:39","slug":"cve-2026-98477","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-98477","title":{"rendered":"CVE-2026-98477 &#8211; In the Linux kernel, the following vulnerability has been resolved:\n\nperf\/core: Fix NULL p"},"content":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>perf\/core: Fix NULL pmu_ctx passed to pmu-&gt;sched_task()<\/p>\n<p>perf_pmu_sched_task() returns early when cpuctx-&gt;task_ctx is set, and<br \/>\ncpc-&gt;task_epc is only non-NULL while a task context is scheduled in on<br \/>\nthis CPU. __perf_pmu_sched_task() therefore always passes NULL:<\/p>\n<p>  Unable to handle kernel NULL pointer dereference at virtual address 00<br \/>\n  pc : armv8pmu_sched_task+0x14\/0x50<br \/>\n  Call trace:<br \/>\n   armv8pmu_sched_task+0x14\/0x50 (P)<br \/>\n   perf_pmu_sched_task+0xac\/0x108<br \/>\n   __perf_event_task_sched_out+0x6c\/0xe0<\/p>\n<p>Pass &amp;cpc-&gt;epc instead, the CPU-wide context for this PMU, which the<br \/>\nfunction already dereferences a few lines up to find pmu.<\/p>\n<p>armv8pmu_sched_task() is the only in-tree implementation that<br \/>\ndereferences the argument, and it only reads -&gt;pmu, so the oops needs<br \/>\nBRBE, added in v6.17.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>perf\/core: Fix NULL pmu_ctx passed to pmu-&gt;sched_task()<\/p>\n<p>perf_pmu_sched_task() returns early when cpuctx-&gt;task_ctx is set, and<br \/>\ncpc-<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-40949","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/40949","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln"}],"about":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/types\/vuln"}],"wp:attachment":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=40949"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=40949"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=40949"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}