ksmbd: fix use-after-free from async crypto on Qualcomm crypto engine_CVE-2026-53046

{
    "lastseen": "",
    "description": "In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: fix use-after-free from async crypto on Qualcomm crypto engine\n\nksmbd_crypt_message() sets a NULL completion callback on AEAD requests\nand does not handle the -EINPROGRESS return code from async hardware\ncrypto engines like the Qualcomm Crypto Engine (QCE). When QCE returns\n-EINPROGRESS, ksmbd treats it as an error and immediately frees the\nrequest while the hardware DMA operation is still in flight. The DMA\ncompletion callback then dereferences freed memory, causing a NULL\npointer crash:\n\n  pc : qce_skcipher_done+0x24/0x174\n  lr : vchan_complete+0x230/0x27c\n  ...\n  el1h_64_irq+0x68/0x6c\n  ksmbd_free_work_struct+0x20/0x118 [ksmbd]\n  ksmbd_exit_file_cache+0x694/0xa4c [ksmbd]\n\nUse the standard crypto_wait_req() pattern with crypto_req_done() as\nthe completion callback, matching the approach used by the SMB client\nin fs/smb/client/smb2ops.c. This properly handles both synchronous\nengines (immediate return) and async engines (-EINPROGRESS followed\nby callback notification).",
    "published": "2026-06-24T16:29:52.676Z",
    "modified": "2026-06-28T06:38:28.822Z",
    "type": "cve",
    "title": "ksmbd: fix use-after-free from async crypto on Qualcomm crypto engine",
    "source": "Linux",
    "references": "https://git.kernel.org/stable/c/57b47231055b431ed0a1a55f33cac32981564405\nhttps://git.kernel.org/stable/c/cc2da381875d4a67026e4c8feb3dba51a2a2d1bc\nhttps://git.kernel.org/stable/c/8fcefe840fa8c14ce667768e5b043286ac3bbcbe\nhttps://git.kernel.org/stable/c/8ef183216feaa24b66b940510d8b68f680eb56e9\nhttps://git.kernel.org/stable/c/7164b3953cefd540e7ebca828c793bc6869cfbc4\nhttps://git.kernel.org/stable/c/b46aa129fa2807bfe1545fe74d9295d53c51520b\nhttps://git.kernel.org/stable/c/3e298897f41c61450c2e7a4f457e8b2485eb35b3",
    "id": "CVE-2026-53046",
    "bulletinFamily": "",
    "cwe": null,
    "cvelist": null,
    "sourceData": "Linux Linux e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9\nLinux Linux e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9\nLinux Linux e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9\nLinux Linux e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9\nLinux Linux e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9\nLinux Linux e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9\nLinux Linux e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9\nLinux Linux 5.15",
    "sourceHref": "",
    "cvss": {
        "score": 9.8,
        "severity": "CRITICAL",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
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            "privilegesRequired": "",
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            "confidentialityImpact": "",
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        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "Linux",
    "version": "e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9",
    "vendor": "Linux",
    "ai_description": "Use-after-free vulnerability in ksmbd due to incorrect handling of async crypto on Qualcomm crypto engine",
    "ai_severity": "Critical",
    "ai_vendor": "Linux",
    "ai_product": "ksmbd",
    "ai_version": "e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9",
    "ai_score": 9.8
}