{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2023-53998",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2025-12-24T10:53:46.176Z",
        "datePublished": "2025-12-24T10:55:34.856Z",
        "dateUpdated": "2026-05-11T19:53:18.694Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-05-11T19:53:18.694Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nhwrng: virtio - Fix race on data_avail and actual data\n\nThe virtio rng device kicks off a new entropy request whenever the\ndata available reaches zero.  When a new request occurs at the end\nof a read operation, that is, when the result of that request is\nonly needed by the next reader, then there is a race between the\nwriting of the new data and the next reader.\n\nThis is because there is no synchronisation whatsoever between the\nwriter and the reader.\n\nFix this by writing data_avail with smp_store_release and reading\nit with smp_load_acquire when we first enter read.  The subsequent\nreads are safe because they're either protected by the first load\nacquire, or by the completion mechanism.\n\nAlso remove the redundant zeroing of data_idx in random_recv_done\n(data_idx must already be zero at this point) and data_avail in\nrequest_entropy (ditto)."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/char/hw_random/virtio-rng.c"
                    ],
                    "versions": [
                        {
                            "version": "f7f510ec195781c857ab76366a3e1c59e1caae42",
                            "lessThan": "241ef15776a7c8505008db689175b320d345ecd3",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "f7f510ec195781c857ab76366a3e1c59e1caae42",
                            "lessThan": "a43bcb0b661cbbf3ad797d2aee6b6fd06b8fc69d",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "f7f510ec195781c857ab76366a3e1c59e1caae42",
                            "lessThan": "77471e4912d3960dafe141e268c44be8024fe4dc",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "f7f510ec195781c857ab76366a3e1c59e1caae42",
                            "lessThan": "c76d991b6f01a5d931e7053a73bc9524975a5215",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "f7f510ec195781c857ab76366a3e1c59e1caae42",
                            "lessThan": "22c30022cde6e2c88612b3a499223cfa912f1bc7",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "f7f510ec195781c857ab76366a3e1c59e1caae42",
                            "lessThan": "318657b4c2077289659f1cd9e2a34f6a3b208e3e",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "f7f510ec195781c857ab76366a3e1c59e1caae42",
                            "lessThan": "2fc91f156b3f3446a1bce80cf4adedcbf41271c2",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "f7f510ec195781c857ab76366a3e1c59e1caae42",
                            "lessThan": "ac52578d6e8d300dd50f790f29a24169b1edd26c",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/char/hw_random/virtio-rng.c"
                    ],
                    "versions": [
                        {
                            "version": "2.6.26",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "2.6.26",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "4.19.291",
                            "lessThanOrEqual": "4.19.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.4.251",
                            "lessThanOrEqual": "5.4.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.10.188",
                            "lessThanOrEqual": "5.10.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.121",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.39",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.3.13",
                            "lessThanOrEqual": "6.3.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.4.4",
                            "lessThanOrEqual": "6.4.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.5",
                            "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": "2.6.26",
                                    "versionEndExcluding": "4.19.291"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.26",
                                    "versionEndExcluding": "5.4.251"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.26",
                                    "versionEndExcluding": "5.10.188"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.26",
                                    "versionEndExcluding": "5.15.121"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.26",
                                    "versionEndExcluding": "6.1.39"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.26",
                                    "versionEndExcluding": "6.3.13"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.26",
                                    "versionEndExcluding": "6.4.4"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.26",
                                    "versionEndExcluding": "6.5"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/241ef15776a7c8505008db689175b320d345ecd3"
                },
                {
                    "url": "https://git.kernel.org/stable/c/a43bcb0b661cbbf3ad797d2aee6b6fd06b8fc69d"
                },
                {
                    "url": "https://git.kernel.org/stable/c/77471e4912d3960dafe141e268c44be8024fe4dc"
                },
                {
                    "url": "https://git.kernel.org/stable/c/c76d991b6f01a5d931e7053a73bc9524975a5215"
                },
                {
                    "url": "https://git.kernel.org/stable/c/22c30022cde6e2c88612b3a499223cfa912f1bc7"
                },
                {
                    "url": "https://git.kernel.org/stable/c/318657b4c2077289659f1cd9e2a34f6a3b208e3e"
                },
                {
                    "url": "https://git.kernel.org/stable/c/2fc91f156b3f3446a1bce80cf4adedcbf41271c2"
                },
                {
                    "url": "https://git.kernel.org/stable/c/ac52578d6e8d300dd50f790f29a24169b1edd26c"
                }
            ],
            "title": "hwrng: virtio - Fix race on data_avail and actual data",
            "x_generator": {
                "engine": "bippy-1.2.0"
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    }
}