{"id":"CVE-2026-98611","summary":"bpf: Check params size before reading reserved fields","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Check params size before reading reserved fields\n\nbpf_crypto_ctx_create() is a kfunc whose second argument is declared\nwith the __sz annotation, so the verifier only guarantees that\nparams__sz bytes of params are valid.  The function nevertheless reads\nparams-\u003ereserved[0] and params-\u003ereserved[1] (offsets 14 and 15) before\ncomparing params__sz against the size of struct bpf_crypto_params, so a\nBPF program can pass a shorter buffer and have the kernel read past the\nregion that was validated for it.\n\nMove the size check in front of the reserved field reads.","modified":"2026-10-20T02:31:09.410216240Z","published":"2026-10-18T15:19:26.922Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98611.json"},"references":[{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"},{"type":"WEB","url":"https://git.kernel.org/stable/c/86a0e945fb645ea90233fde239cd2de79f01974c"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a11212910cf09b2fe8db9afa41ef60c4f81879c5"},{"type":"WEB","url":"https://git.kernel.org/stable/c/cd12d3e08620257fbcaa262785d7f4b9473afc7a"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e03253f5d65ebcd2a6d479f140c3bd9c7e4fb84a"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98611.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98611"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"3e1c6f35409f9e447bf37f64840f5b65576bfb78"},{"fixed":"e03253f5d65ebcd2a6d479f140c3bd9c7e4fb84a"},{"fixed":"cd12d3e08620257fbcaa262785d7f4b9473afc7a"},{"fixed":"86a0e945fb645ea90233fde239cd2de79f01974c"},{"fixed":"a11212910cf09b2fe8db9afa41ef60c4f81879c5"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-98611.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.10.0"},{"fixed":"6.12.112"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.55"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.2.9"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-98611.json"}}],"schema_version":"1.9.0"}