{"id":"CVE-2026-43304","summary":"libceph: define and enforce CEPH_MAX_KEY_LEN","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nlibceph: define and enforce CEPH_MAX_KEY_LEN\n\nWhen decoding the key, verify that the key material would fit into\na fixed-size buffer in process_auth_done() and generally has a sane\nlength.\n\nThe new CEPH_MAX_KEY_LEN check replaces the existing check for a key\nwith no key material which is a) not universal since CEPH_CRYPTO_NONE\nhas to be excluded and b) doesn't provide much value since a smaller\nthan needed key is just as invalid as no key -- this has to be handled\nelsewhere anyway.","modified":"2026-06-18T03:55:58.845854243Z","published":"2026-05-08T13:11:24.264Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43304.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/1b275bd49e58752efb83767a5d1aed41356c5e64"},{"type":"WEB","url":"https://git.kernel.org/stable/c/6405e8c680974bb74e2c98d5249fb52c7b12a6c6"},{"type":"WEB","url":"https://git.kernel.org/stable/c/8d745d38c88ecbed95f6b2b39857bf89f35a3244"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ac431d597a9bdfc2ba6b314813f29a6ef2b4a3bf"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c1a0f5f1e5e7e98c36a362ec3d1fcfd9932931ed"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d82467c07b03a27c3c5469b62bb3b726305a80bb"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e1dc45d97975f9db65694d234fbddf1915176e16"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43304.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-43304"},{"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":"cd1a677cad994021b19665ed476aea63f5d54f31"},{"fixed":"6405e8c680974bb74e2c98d5249fb52c7b12a6c6"},{"fixed":"8d745d38c88ecbed95f6b2b39857bf89f35a3244"},{"fixed":"e1dc45d97975f9db65694d234fbddf1915176e16"},{"fixed":"1b275bd49e58752efb83767a5d1aed41356c5e64"},{"fixed":"c1a0f5f1e5e7e98c36a362ec3d1fcfd9932931ed"},{"fixed":"d82467c07b03a27c3c5469b62bb3b726305a80bb"},{"fixed":"ac431d597a9bdfc2ba6b314813f29a6ef2b4a3bf"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-43304.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.202"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.165"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.128"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.75"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.16"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"6.19.6"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-43304.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"}]}