{"id":"CVE-2026-99037","summary":"dm-crypt: reject the lmk IV mode with AEAD ciphers","details":"In the Linux kernel, the following vulnerability has been resolved:\n\ndm-crypt: reject the lmk IV mode with AEAD ciphers\n\nA \"capi:\" table line that pairs an AEAD cipher with the lmk IV mode,\nfor example \"capi:gcm(aes)-lmk\" with the integrity:28:aead option,\ncauses an oops when it is loaded. lmk sets tfms_count to 64, but\ncrypt_alloc_tfms_aead only allocates one transform, so crypt_setkey\nreads past the end of the tfms_aead array and calls crypto_aead_setkey\non the values it finds there.\n\nlmk exists for compatibility with Loop-AES, which uses CBC, so refuse\nit with an AEAD cipher rather than allocate 64 AEAD transforms. The\ncheck cannot go in crypt_iv_lmk_ctr with the other lmk checks, because\nthe IV constructor runs after crypt_set_key.\n\nNote that this is not a security bug because the memory corruption can\nonly be triggered by root.","modified":"2026-11-01T02:35:50.245591922Z","published":"2026-10-23T12:21:54.317Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/99xxx/CVE-2026-99037.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/3195e0daf590683992edb4eed32269e569e04924"},{"type":"WEB","url":"https://git.kernel.org/stable/c/40ea7dfa8cd5f9aed72a55c9ca3008aee5880e6f"},{"type":"WEB","url":"https://git.kernel.org/stable/c/412d1c1f490ed9ec5bd029883e8a626626613a70"},{"type":"WEB","url":"https://git.kernel.org/stable/c/962ce265fbf5d87afeb78cf19c12e083ab0ffeb8"},{"type":"WEB","url":"https://git.kernel.org/stable/c/9a0dab8a9d9975dec14a118b55cae2517aea5ca9"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a04546fa65cbcf4a2774f93f365d747a19abb9b8"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a1a875614dae43b43d311bb9e7a7a70eed78efe6"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a50e830ded5a0d0cb9e897d1521716ba654f8c3e"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/99xxx/CVE-2026-99037.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-99037"},{"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":"33d2f09fcb357fd1861c4959d1d3505492bf91f8"},{"fixed":"a04546fa65cbcf4a2774f93f365d747a19abb9b8"},{"fixed":"412d1c1f490ed9ec5bd029883e8a626626613a70"},{"fixed":"a50e830ded5a0d0cb9e897d1521716ba654f8c3e"},{"fixed":"9a0dab8a9d9975dec14a118b55cae2517aea5ca9"},{"fixed":"962ce265fbf5d87afeb78cf19c12e083ab0ffeb8"},{"fixed":"a1a875614dae43b43d311bb9e7a7a70eed78efe6"},{"fixed":"40ea7dfa8cd5f9aed72a55c9ca3008aee5880e6f"},{"fixed":"3195e0daf590683992edb4eed32269e569e04924"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-99037.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.12.0"},{"fixed":"5.10.273"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.224"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.191"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.160"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.113"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.57"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.2.11"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-99037.json"}}],"schema_version":"1.9.2"}