{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-64521 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2026-64521 is a denial of service vulnerability in Linux, published on 25 Jul 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-2026-64521 and fix it if it is affected.\n\nWhat it is: CVE-2026-64521 is a denial of service vulnerability in Linux, published on 25 Jul 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-2026-64521 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-2026-64521/ (Markdown: https://insights.sbomify.com/CVE-2026-64521/index.md)","id":"CVE-2026-64521","markdown":"https://insights.sbomify.com/CVE-2026-64521/index.md","name":"CVE-2026-64521","record":{"aliases":["BELL-CVE-2026-64521","DEBIAN-CVE-2026-64521","GHSA-gf4r-jj9w-gcc4","ROOT-OS-UBUNTU-2204-CVE-2026-64521","UBUNTU-CVE-2026-64521"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Linux kernel","requires_auth":"none","summary":"A local attacker can cause a system deadlock by accessing a specific sysfs node in the Linux kernel pinctrl driver, leading to denial of service.","user_interaction":"not_required","vuln_class":"denial_of_service"},"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\npinctrl: meson: amlogic-a4: fix deadlock issue\n\nAccessing the pinconf-pins sysfs node may deadlock.\n\npinconf_pins_show() holds pctldev-\u003emutex, and the platform driver\ncalls pinctrl_find_gpio_range_from_pin(), which tries to acquire\nthe same mutex again, leading to a deadlock.\n\nUse pinctrl_find_gpio_range_from_pin_nolock() to fix this issue.","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":"pinctrl: meson: amlogic-a4: fix deadlock issue","id":"CVE-2026-64521","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"denial_of_service","year":"2026"},"n_packages":0,"n_references":3,"next":{"headline":"net/mlx5e: Fix eswitch mode block underflow on IPsec acquire SA","id":"CVE-2026-64522"},"packages":[],"prev":{"headline":"firmware: arm_ffa: Bound PARTITION_INFO_GET_REGS copies","id":"CVE-2026-64520"},"products":["Linux"],"published":"2026-07-25","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":"2026-07-25","vendors":["Linux"]},"summary":"A local attacker can cause a system deadlock by accessing a specific sysfs node in the Linux kernel pinctrl driver, leading to denial of service.","url":"https://insights.sbomify.com/CVE-2026-64521/"}