{"id":"CVE-2025-39990","summary":"bpf: Check the helper function is valid in get_helper_proto","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Check the helper function is valid in get_helper_proto\n\nkernel test robot reported verifier bug [1] where the helper func\npointer could be NULL due to disabled config option.\n\nAs Alexei suggested we could check on that in get_helper_proto\ndirectly. Marking tail_call helper func with BPF_PTR_POISON,\nbecause it is unused by design.\n\n  [1] https://lore.kernel.org/oe-lkp/202507160818.68358831-lkp@intel.com","modified":"2026-03-20T12:43:08.095040Z","published":"2025-10-15T07:56:07.295Z","related":["SUSE-SU-2026:20012-1","SUSE-SU-2026:20015-1","SUSE-SU-2026:20021-1","openSUSE-SU-2025:20172-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/39xxx/CVE-2025-39990.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/3d429cb1278e995e22995ef117fa96d223a67e93"},{"type":"WEB","url":"https://git.kernel.org/stable/c/6233715b4b714068d6c831d214a4e8792109875a"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e4414b01c1cd9887bbde92f946c1ba94e40d6d64"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/39xxx/CVE-2025-39990.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-39990"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"f470378c7562a2818b45ed11c98973f2b89eedd3"},{"fixed":"3d429cb1278e995e22995ef117fa96d223a67e93"},{"fixed":"6233715b4b714068d6c831d214a4e8792109875a"},{"fixed":"e4414b01c1cd9887bbde92f946c1ba94e40d6d64"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-39990.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"5.8.0"},{"fixed":"6.12.50"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.16.10"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-39990.json"}}],"schema_version":"1.7.5"}