crypto: krb5enc – fix async decrypt skipping hash verification_CVE-2026-31719

{
    "lastseen": "",
    "description": "In the Linux kernel, the following vulnerability has been resolved:\n\ncrypto: krb5enc - fix async decrypt skipping hash verification\n\nkrb5enc_dispatch_decrypt() sets req->base.complete as the skcipher\ncallback, which is the caller's own completion handler. When the\nskcipher completes asynchronously, this signals \"done\" to the caller\nwithout executing krb5enc_dispatch_decrypt_hash(), completely bypassing\nthe integrity verification (hash check).\n\nCompare with the encrypt path which correctly uses\nkrb5enc_encrypt_done as an intermediate callback to chain into the\nhash computation on async completion.\n\nFix by adding krb5enc_decrypt_done as an intermediate callback that\nchains into krb5enc_dispatch_decrypt_hash() upon async skcipher\ncompletion, matching the encrypt path's callback pattern.\n\nAlso fix EBUSY/EINPROGRESS handling throughout: remove\nkrb5enc_request_complete() which incorrectly swallowed EINPROGRESS\nnotifications that must be passed up to callers waiting on backlogged\nrequests, and add missing EBUSY checks in krb5enc_encrypt_ahash_done\nfor the dispatch_encrypt return value.\n\n\nUnset MAY_BACKLOG on the async completion path so the user won't\nsee back-to-back EINPROGRESS notifications.",
    "published": "2026-05-01T13:56:13.385Z",
    "modified": "2026-05-03T05:45:40.086Z",
    "type": "cve",
    "title": "crypto: krb5enc - fix async decrypt skipping hash verification",
    "source": "Linux",
    "references": "https://git.kernel.org/stable/c/07cbb1bd424370671814a862913c99a6e1441588\nhttps://git.kernel.org/stable/c/e51f42114abbdf47f29dda43e7826be28907fcd2\nhttps://git.kernel.org/stable/c/3bfbf5f0a99c991769ec562721285df7ab69240b",
    "id": "CVE-2026-31719",
    "bulletinFamily": "",
    "cwe": null,
    "cvelist": null,
    "sourceData": "Linux Linux d1775a177f7f38156d541c8a3e3c91eaa6e69699\nLinux Linux d1775a177f7f38156d541c8a3e3c91eaa6e69699\nLinux Linux d1775a177f7f38156d541c8a3e3c91eaa6e69699\nLinux Linux 6.15",
    "sourceHref": "",
    "cvss": {
        "score": 7.5,
        "severity": "HIGH",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
        "version": "3.1"
    },
    "cvss2": [],
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        "baseScore": 0,
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        "privilegesRequired": "",
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        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
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            "baseScore": 0,
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    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "Linux",
    "version": "d1775a177f7f38156d541c8a3e3c91eaa6e69699",
    "vendor": "Linux",
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    "ai_score": 0
}