{"id":"CVE-2026-45971","summary":"bpf: Limit bpf program signature size","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Limit bpf program signature size\n\nPractical BPF signatures are significantly smaller than\nKMALLOC_MAX_CACHE_SIZE\n\nAllowing larger sizes opens the door for abuse by passing excessive\nsize values and forcing the kernel into expensive allocation paths (via\nkmalloc_large or vmalloc).","modified":"2026-07-08T08:09:40.413899799Z","published":"2026-05-27T12:18:30.651Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45971.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/5835a077c6f5c565d525eaca9fac01572b97a9b9"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ea1535e28bb3773fc0b3cbd1f3842b808016990c"},{"type":"WEB","url":"https://git.kernel.org/stable/c/eb8166c79097996396468a341de258a798789d36"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45971.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-45971"},{"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":"349271568303695f0ac3563af153d2b4542f6986"},{"fixed":"5835a077c6f5c565d525eaca9fac01572b97a9b9"},{"fixed":"eb8166c79097996396468a341de258a798789d36"},{"fixed":"ea1535e28bb3773fc0b3cbd1f3842b808016990c"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-45971.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.18.0"},{"fixed":"6.18.14"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"6.19.4"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-45971.json"}}],"schema_version":"1.7.5"}