{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-46033", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-05-13T15:03:33.093Z", "datePublished": "2026-05-27T12:56:42.038Z", "dateUpdated": "2026-05-27T12:56:42.038Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-27T12:56:42.038Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncrypto: authencesn - reject short ahash digests during instance creation\n\nauthencesn requires either a zero authsize or an authsize of at least\n4 bytes because the ESN encrypt/decrypt paths always move 4 bytes of\nhigh-order sequence number data at the end of the authenticated data.\n\nWhile crypto_authenc_esn_setauthsize() already rejects explicit\nnon-zero authsizes in the range 1..3, crypto_authenc_esn_create()\nstill copied auth->digestsize into inst->alg.maxauthsize without\nvalidating it. The AEAD core then initialized the tfm's default\nauthsize from that value.\n\nAs a result, selecting an ahash with digest size 1..3, such as\ncbcmac(cipher_null), exposed authencesn instances whose default\nauthsize was invalid even though setauthsize() would have rejected the\nsame value. AF_ALG could then trigger the ESN tail handling with a\ntoo-short tag and hit an out-of-bounds access.\n\nReject authencesn instances whose ahash digest size is in the invalid\nnon-zero range 1..3 so that no tfm can inherit an unsupported default\nauthsize."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["crypto/authencesn.c"], "versions": [{"version": "f15f05b0a5de667c821a9727c33bce9d1d9b26dd", "lessThan": "b69933e97efea238ebbfcf70c2b1be1cd03f13e3", "status": "affected", "versionType": "git"}, {"version": "f15f05b0a5de667c821a9727c33bce9d1d9b26dd", "lessThan": "67f1f0933cc3d78dde222842bcad2778ec7a0b88", "status": "affected", "versionType": "git"}, {"version": "f15f05b0a5de667c821a9727c33bce9d1d9b26dd", "lessThan": "b42821c15445f93daea3e76ada682b2b7181c476", "status": "affected", "versionType": "git"}, {"version": "f15f05b0a5de667c821a9727c33bce9d1d9b26dd", "lessThan": "9aff81e8217e9de2929084b03b3c7f81988c112b", "status": "affected", "versionType": "git"}, {"version": "f15f05b0a5de667c821a9727c33bce9d1d9b26dd", "lessThan": "5db6ef9847717329f12c5ea8aba7e9f588a980c0", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["crypto/authencesn.c"], "versions": [{"version": "4.11", "status": "affected"}, {"version": "0", "lessThan": "4.11", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.140", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.86", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.27", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0.4", "lessThanOrEqual": "7.0.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1-rc2", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.11", "versionEndExcluding": "6.6.140"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.11", "versionEndExcluding": "6.12.86"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.11", "versionEndExcluding": "6.18.27"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.11", "versionEndExcluding": "7.0.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.11", "versionEndExcluding": "7.1-rc2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/b69933e97efea238ebbfcf70c2b1be1cd03f13e3"}, {"url": "https://git.kernel.org/stable/c/67f1f0933cc3d78dde222842bcad2778ec7a0b88"}, {"url": "https://git.kernel.org/stable/c/b42821c15445f93daea3e76ada682b2b7181c476"}, {"url": "https://git.kernel.org/stable/c/9aff81e8217e9de2929084b03b3c7f81988c112b"}, {"url": "https://git.kernel.org/stable/c/5db6ef9847717329f12c5ea8aba7e9f588a980c0"}], "title": "crypto: authencesn - reject short ahash digests during instance creation", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncrypto: authencesn - reject short ahash digests during instance creation\n\nauthencesn requires either a zero authsize or an authsize of at least\n4 bytes because the ESN encrypt/decrypt paths always move 4 bytes of\nhigh-order sequence number data at the end of the authenticated data.\n\nWhile crypto_authenc_esn_setauthsize() already rejects explicit\nnon-zero authsizes in the range 1..3, crypto_authenc_esn_create()\nstill copied auth->digestsize into inst->alg.maxauthsize without\nvalidating it. The AEAD core then initialized the tfm's default\nauthsize from that value.\n\nAs a result, selecting an ahash with digest size 1..3, such as\ncbcmac(cipher_null), exposed authencesn instances whose default\nauthsize was invalid even though setauthsize() would have rejected the\nsame value. AF_ALG could then trigger the ESN tail handling with a\ntoo-short tag and hit an out-of-bounds access.\n\nReject authencesn instances whose ahash digest size is in the invalid\nnon-zero range 1..3 so that no tfm can inherit an unsupported default\nauthsize."}], "id": "CVE-2026-46033", "lastModified": "2026-05-27T14:48:03.013", "metrics": {}, "published": "2026-05-27T14:17:22.313", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/5db6ef9847717329f12c5ea8aba7e9f588a980c0"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/67f1f0933cc3d78dde222842bcad2778ec7a0b88"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/9aff81e8217e9de2929084b03b3c7f81988c112b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b42821c15445f93daea3e76ada682b2b7181c476"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b69933e97efea238ebbfcf70c2b1be1cd03f13e3"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis"}

{}

{}