{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2022-50731",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2025-12-24T12:20:40.331Z",
        "datePublished": "2025-12-24T12:22:51.122Z",
        "dateUpdated": "2026-05-11T19:24:25.645Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-05-11T19:24:25.645Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncrypto: akcipher - default implementation for setting a private key\n\nChanges from v1:\n  * removed the default implementation from set_pub_key: it is assumed that\n    an implementation must always have this callback defined as there are\n    no use case for an algorithm, which doesn't need a public key\n\nMany akcipher implementations (like ECDSA) support only signature\nverifications, so they don't have all callbacks defined.\n\nCommit 78a0324f4a53 (\"crypto: akcipher - default implementations for\nrequest callbacks\") introduced default callbacks for sign/verify\noperations, which just return an error code.\n\nHowever, these are not enough, because before calling sign the caller would\nlikely call set_priv_key first on the instantiated transform (as the\nin-kernel testmgr does). This function does not have a default stub, so the\nkernel crashes, when trying to set a private key on an akcipher, which\ndoesn't support signature generation.\n\nI've noticed this, when trying to add a KAT vector for ECDSA signature to\nthe testmgr.\n\nWith this patch the testmgr returns an error in dmesg (as it should)\ninstead of crashing the kernel NULL ptr dereference."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "crypto/akcipher.c"
                    ],
                    "versions": [
                        {
                            "version": "78a0324f4a5328088fea9426cfe1d1851276c475",
                            "lessThan": "95c4e20adc3ea00d1594a2a05d9b187ed12ffa8e",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "78a0324f4a5328088fea9426cfe1d1851276c475",
                            "lessThan": "a1354bdd191d533211b7cb723aa76a66f516f197",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "78a0324f4a5328088fea9426cfe1d1851276c475",
                            "lessThan": "779a9930f3e152c82699feb389a0e6d6644e747e",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "78a0324f4a5328088fea9426cfe1d1851276c475",
                            "lessThan": "85bc736a18b872f54912e8bb70682d11770aece0",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "78a0324f4a5328088fea9426cfe1d1851276c475",
                            "lessThan": "f9058178597059d6307efe96a7916600f8ede08c",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "78a0324f4a5328088fea9426cfe1d1851276c475",
                            "lessThan": "bc155c6c188c2f0c5749993b1405673d25a80389",
                            "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/akcipher.c"
                    ],
                    "versions": [
                        {
                            "version": "5.2",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "5.2",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.4.220",
                            "lessThanOrEqual": "5.4.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.10.150",
                            "lessThanOrEqual": "5.10.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.75",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.19.17",
                            "lessThanOrEqual": "5.19.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.0.3",
                            "lessThanOrEqual": "6.0.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1",
                            "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": "5.2",
                                    "versionEndExcluding": "5.4.220"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.2",
                                    "versionEndExcluding": "5.10.150"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.2",
                                    "versionEndExcluding": "5.15.75"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.2",
                                    "versionEndExcluding": "5.19.17"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.2",
                                    "versionEndExcluding": "6.0.3"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.2",
                                    "versionEndExcluding": "6.1"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/95c4e20adc3ea00d1594a2a05d9b187ed12ffa8e"
                },
                {
                    "url": "https://git.kernel.org/stable/c/a1354bdd191d533211b7cb723aa76a66f516f197"
                },
                {
                    "url": "https://git.kernel.org/stable/c/779a9930f3e152c82699feb389a0e6d6644e747e"
                },
                {
                    "url": "https://git.kernel.org/stable/c/85bc736a18b872f54912e8bb70682d11770aece0"
                },
                {
                    "url": "https://git.kernel.org/stable/c/f9058178597059d6307efe96a7916600f8ede08c"
                },
                {
                    "url": "https://git.kernel.org/stable/c/bc155c6c188c2f0c5749993b1405673d25a80389"
                }
            ],
            "title": "crypto: akcipher - default implementation for setting a private key",
            "x_generator": {
                "engine": "bippy-1.2.0"
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    }
}