{"id":"CVE-2026-99037","state":"PUBLISHED","title":"dm-crypt: reject the lmk IV mode with AEAD ciphers","description":"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.","publishedAt":"2026-10-23T12:21:54.317Z","updatedAt":"2026-10-30T12:41:10.478Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"33d2f09fcb357fd1861c4959d1d3505492bf91f8","status":"affected","lessThan":"a04546fa65cbcf4a2774f93f365d747a19abb9b8","versionType":"git"},{"version":"33d2f09fcb357fd1861c4959d1d3505492bf91f8","status":"affected","lessThan":"412d1c1f490ed9ec5bd029883e8a626626613a70","versionType":"git"},{"version":"33d2f09fcb357fd1861c4959d1d3505492bf91f8","status":"affected","lessThan":"a50e830ded5a0d0cb9e897d1521716ba654f8c3e","versionType":"git"},{"version":"33d2f09fcb357fd1861c4959d1d3505492bf91f8","status":"affected","lessThan":"9a0dab8a9d9975dec14a118b55cae2517aea5ca9","versionType":"git"},{"version":"33d2f09fcb357fd1861c4959d1d3505492bf91f8","status":"affected","lessThan":"962ce265fbf5d87afeb78cf19c12e083ab0ffeb8","versionType":"git"},{"version":"33d2f09fcb357fd1861c4959d1d3505492bf91f8","status":"affected","lessThan":"a1a875614dae43b43d311bb9e7a7a70eed78efe6","versionType":"git"},{"version":"33d2f09fcb357fd1861c4959d1d3505492bf91f8","status":"affected","lessThan":"40ea7dfa8cd5f9aed72a55c9ca3008aee5880e6f","versionType":"git"},{"version":"33d2f09fcb357fd1861c4959d1d3505492bf91f8","status":"affected","lessThan":"3195e0daf590683992edb4eed32269e569e04924","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/md/dm-crypt.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.12","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.12","versionType":"semver"},{"version":"5.10.273","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.224","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.191","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.160","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.113","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.57","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.11","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/md/dm-crypt.c"]}],"references":["https://git.kernel.org/stable/c/a04546fa65cbcf4a2774f93f365d747a19abb9b8","https://git.kernel.org/stable/c/412d1c1f490ed9ec5bd029883e8a626626613a70","https://git.kernel.org/stable/c/a50e830ded5a0d0cb9e897d1521716ba654f8c3e","https://git.kernel.org/stable/c/9a0dab8a9d9975dec14a118b55cae2517aea5ca9","https://git.kernel.org/stable/c/962ce265fbf5d87afeb78cf19c12e083ab0ffeb8","https://git.kernel.org/stable/c/a1a875614dae43b43d311bb9e7a7a70eed78efe6","https://git.kernel.org/stable/c/40ea7dfa8cd5f9aed72a55c9ca3008aee5880e6f","https://git.kernel.org/stable/c/3195e0daf590683992edb4eed32269e569e04924"],"weaknesses":[],"ingestedAt":"2026-10-30T13:00:06.648Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/99xxx/CVE-2026-99037.json","commit":"cb14bf1b43b0c9f05f7f40eae2246263fd430780","baselineCommit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-99037","state":"PUBLISHED","datePublished":"2026-10-23T12:21:54.317Z","dateUpdated":"2026-10-30T12:41:10.478Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-25T10:25:14.387Z"},"containers":{"cna":{"title":"dm-crypt: reject the lmk IV mode with AEAD ciphers","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"33d2f09fcb357fd1861c4959d1d3505492bf91f8","status":"affected","lessThan":"a04546fa65cbcf4a2774f93f365d747a19abb9b8","versionType":"git"},{"version":"33d2f09fcb357fd1861c4959d1d3505492bf91f8","status":"affected","lessThan":"412d1c1f490ed9ec5bd029883e8a626626613a70","versionType":"git"},{"version":"33d2f09fcb357fd1861c4959d1d3505492bf91f8","status":"affected","lessThan":"a50e830ded5a0d0cb9e897d1521716ba654f8c3e","versionType":"git"},{"version":"33d2f09fcb357fd1861c4959d1d3505492bf91f8","status":"affected","lessThan":"9a0dab8a9d9975dec14a118b55cae2517aea5ca9","versionType":"git"},{"version":"33d2f09fcb357fd1861c4959d1d3505492bf91f8","status":"affected","lessThan":"962ce265fbf5d87afeb78cf19c12e083ab0ffeb8","versionType":"git"},{"version":"33d2f09fcb357fd1861c4959d1d3505492bf91f8","status":"affected","lessThan":"a1a875614dae43b43d311bb9e7a7a70eed78efe6","versionType":"git"},{"version":"33d2f09fcb357fd1861c4959d1d3505492bf91f8","status":"affected","lessThan":"40ea7dfa8cd5f9aed72a55c9ca3008aee5880e6f","versionType":"git"},{"version":"33d2f09fcb357fd1861c4959d1d3505492bf91f8","status":"affected","lessThan":"3195e0daf590683992edb4eed32269e569e04924","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/md/dm-crypt.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.12","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.12","versionType":"semver"},{"version":"5.10.273","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.224","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.191","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.160","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.113","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.57","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.11","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/md/dm-crypt.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/a04546fa65cbcf4a2774f93f365d747a19abb9b8"},{"url":"https://git.kernel.org/stable/c/412d1c1f490ed9ec5bd029883e8a626626613a70"},{"url":"https://git.kernel.org/stable/c/a50e830ded5a0d0cb9e897d1521716ba654f8c3e"},{"url":"https://git.kernel.org/stable/c/9a0dab8a9d9975dec14a118b55cae2517aea5ca9"},{"url":"https://git.kernel.org/stable/c/962ce265fbf5d87afeb78cf19c12e083ab0ffeb8"},{"url":"https://git.kernel.org/stable/c/a1a875614dae43b43d311bb9e7a7a70eed78efe6"},{"url":"https://git.kernel.org/stable/c/40ea7dfa8cd5f9aed72a55c9ca3008aee5880e6f"},{"url":"https://git.kernel.org/stable/c/3195e0daf590683992edb4eed32269e569e04924"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-30T12:41:10.478Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.12","versionEndExcluding":"5.10.273"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.12","versionEndExcluding":"5.15.224"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.12","versionEndExcluding":"6.1.191"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.12","versionEndExcluding":"6.6.160"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.12","versionEndExcluding":"6.12.113"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.12","versionEndExcluding":"6.18.57"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.12","versionEndExcluding":"7.2.11"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.12","versionEndExcluding":"7.3"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}