{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-90066 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2026-90066 is a vulnerability in Linux, published on 17 Sep 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-2026-90066 and fix it if it is affected.\n\nWhat it is: CVE-2026-90066 is a vulnerability in Linux, published on 17 Sep 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-2026-90066 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-2026-90066/ (Markdown: https://insights.sbomify.com/CVE-2026-90066/index.md)","id":"CVE-2026-90066","markdown":"https://insights.sbomify.com/CVE-2026-90066/index.md","name":"CVE-2026-90066","record":{"aliases":["AZL-102860","BELL-CVE-2026-90066","DEBIAN-CVE-2026-90066","GHSA-h42m-cfhq-9g8c","UBUNTU-CVE-2026-90066"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":true,"product_category":"Linux kernel sample","requires_auth":"high_privilege","summary":"A null pointer dereference in the Linux kernel ftrace sample module can cause a system crash during module unload if thread creation fails.","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\nsamples/ftrace: Fix kthread_stop() on ERR_PTR in ftrace-direct-multi-modify\n\nftrace_direct_multi_init() assigns kthread_run()'s return value to\nsimple_tsk without an IS_ERR() check. When kthread_run() fails it\nreturns ERR_PTR(-ENOMEM), but init still returns 0, so the module loads\nwith simple_tsk holding an error pointer. On unload,\nftrace_direct_multi_exit() then passes that ERR_PTR to kthread_stop(),\nleading to a null-pointer-dereference.\n\nCheck the return value of kthread_run() with IS_ERR(); on failure,\nunregister the ftrace direct call and propagate the error code.","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":"samples/ftrace: Fix kthread_stop() on ERR_PTR in ftrace-direct-multi-modify","id":"CVE-2026-90066","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":"libceph: validate banner payload length","id":"CVE-2026-90067"},"packages":[],"prev":{"headline":"net/smc: release the internal TCP sock on IPPROTO_SMC socket creation failure","id":"CVE-2026-90065"},"products":["Linux"],"published":"2026-09-17","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":"2026-10-19","vendors":["Linux"]},"summary":"A null pointer dereference in the Linux kernel ftrace sample module can cause a system crash during module unload if thread creation fails.","url":"https://insights.sbomify.com/CVE-2026-90066/"}