{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-98477 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2026-98477 is a vulnerability in Linux, published on 18 Oct 2026. It can only be exploited from the same machine or local network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-98477 and fix it if it is affected.\n\nWhat it is: CVE-2026-98477 is a vulnerability in Linux, published on 18 Oct 2026. It can only be exploited from the same machine or local network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-98477 in the wild and no public exploit code.\n\nAffected product: Linux. No package-level version data is available, so check the vendor advisory linked from the reference page.\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-98477/ (Markdown: https://insights.sbomify.com/CVE-2026-98477/index.md)","id":"CVE-2026-98477","markdown":"https://insights.sbomify.com/CVE-2026-98477/index.md","name":"CVE-2026-98477","record":{"aliases":["AZL-108794","BELL-CVE-2026-98477","DEBIAN-CVE-2026-98477","GHSA-23r4-4gr3-gjfw","UBUNTU-CVE-2026-98477"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":true,"product_category":"Linux kernel","requires_auth":"low_privilege","summary":"A local attacker can trigger a kernel crash via NULL pointer dereference in perf subsystem when BRBE is enabled.","user_interaction":"not_required","vuln_class":"null_dereference"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Linux","cpe":[],"cvss":{"score":null,"severity":null,"source":null,"vector":null,"version":null},"cwes":[],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\nperf/core: Fix NULL pmu_ctx passed to pmu-\u003esched_task()\n\nperf_pmu_sched_task() returns early when cpuctx-\u003etask_ctx is set, and\ncpc-\u003etask_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 \u0026cpc-\u003eepc 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 -\u003epmu, so the oops needs\nBRBE, added in v6.17.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"perf/core: Fix NULL pmu_ctx passed to pmu-\u003esched_task()","id":"CVE-2026-98477","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"null_dereference","year":"2026"},"n_packages":0,"n_references":5,"next":{"headline":"scsi: ufs: core: Keep internal commands dispatchable during error handling","id":"CVE-2026-98478"},"packages":[],"prev":{"headline":"s390/cio: Fix NULL pointer dereference in ccw_device_get_util_str()","id":"CVE-2026-98476"},"products":["Linux"],"published":"2026-10-18","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2026-10-21","vendors":["Linux"]},"summary":"A local attacker can trigger a kernel crash via NULL pointer dereference in perf subsystem when BRBE is enabled.","url":"https://insights.sbomify.com/CVE-2026-98477/"}