{"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": "2025-12-24T12:22:51.122Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2025-12-24T12:22:51.122Z"}, "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"}}}}

{}

{"cveTags": [], "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."}], "id": "CVE-2022-50731", "lastModified": "2025-12-24T13:15:59.770", "metrics": {}, "published": "2025-12-24T13:15:59.770", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/779a9930f3e152c82699feb389a0e6d6644e747e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/85bc736a18b872f54912e8bb70682d11770aece0"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/95c4e20adc3ea00d1594a2a05d9b187ed12ffa8e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a1354bdd191d533211b7cb723aa76a66f516f197"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/bc155c6c188c2f0c5749993b1405673d25a80389"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/f9058178597059d6307efe96a7916600f8ede08c"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{}