CVE-2022-49556

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2022-49556", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-02-26T02:08:31.590Z", "datePublished": "2025-02-26T02:14:03.630Z", "dateUpdated": "2026-11-05T19:49:40.531Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T19:02:13.907Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: SVM: Use kzalloc for sev ioctl interfaces to prevent kernel data leak\n\nFor some sev ioctl interfaces, the length parameter that is passed maybe\nless than or equal to SEV_FW_BLOB_MAX_SIZE, but larger than the data\nthat PSP firmware returns. In this case, kmalloc will allocate memory\nthat is the size of the input rather than the size of the data.\nSince PSP firmware doesn't fully overwrite the allocated buffer, these\nsev ioctl interface may return uninitialized kernel slab memory."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["arch/x86/kvm/svm/sev.c"], "versions": [{"version": "eaf78265a4ab33935d3a0f1407ce4a91aac4d4d5", "lessThan": "401bef1f95de92c3a8c6eece46e02fa88d7285ee", "status": "affected", "versionType": "git"}, {"version": "eaf78265a4ab33935d3a0f1407ce4a91aac4d4d5", "lessThan": "d8fdb4b24097472ff6b3c0559448200d420b1418", "status": "affected", "versionType": "git"}, {"version": "eaf78265a4ab33935d3a0f1407ce4a91aac4d4d5", "lessThan": "bbdcc644b59e01e98c68894a9fab42b9687f42b0", "status": "affected", "versionType": "git"}, {"version": "eaf78265a4ab33935d3a0f1407ce4a91aac4d4d5", "lessThan": "57a01725339f9d82b099102ba2751621b1caab93", "status": "affected", "versionType": "git"}, {"version": "eaf78265a4ab33935d3a0f1407ce4a91aac4d4d5", "lessThan": "d22d2474e3953996f03528b84b7f52cc26a39403", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["arch/x86/kvm/svm/sev.c"], "versions": [{"version": "5.7", "status": "affected"}, {"version": "0", "lessThan": "5.7", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.124", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.45", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.17.13", "lessThanOrEqual": "5.17.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.18.2", "lessThanOrEqual": "5.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.19", "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": "5.7", "versionEndExcluding": "5.10.124"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.7", "versionEndExcluding": "5.15.45"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.7", "versionEndExcluding": "5.17.13"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.7", "versionEndExcluding": "5.18.2"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.7", "versionEndExcluding": "5.19"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/401bef1f95de92c3a8c6eece46e02fa88d7285ee"}, {"url": "https://git.kernel.org/stable/c/d8fdb4b24097472ff6b3c0559448200d420b1418"}, {"url": "https://git.kernel.org/stable/c/bbdcc644b59e01e98c68894a9fab42b9687f42b0"}, {"url": "https://git.kernel.org/stable/c/57a01725339f9d82b099102ba2751621b1caab93"}, {"url": "https://git.kernel.org/stable/c/d22d2474e3953996f03528b84b7f52cc26a39403"}], "title": "KVM: SVM: Use kzalloc for sev ioctl interfaces to prevent kernel data leak", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2022-49556", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-11-05T19:46:11.191593Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-11-05T19:49:40.531Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2022-49556", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-11-05T19:46:11.191593Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-11-05T19:46:12.291Z"}}], "cna": {"title": "KVM: SVM: Use kzalloc for sev ioctl interfaces to prevent kernel data leak", "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "eaf78265a4ab33935d3a0f1407ce4a91aac4d4d5", "lessThan": "401bef1f95de92c3a8c6eece46e02fa88d7285ee", "versionType": "git"}, {"status": "affected", "version": "eaf78265a4ab33935d3a0f1407ce4a91aac4d4d5", "lessThan": "d8fdb4b24097472ff6b3c0559448200d420b1418", "versionType": "git"}, {"status": "affected", "version": "eaf78265a4ab33935d3a0f1407ce4a91aac4d4d5", "lessThan": "bbdcc644b59e01e98c68894a9fab42b9687f42b0", "versionType": "git"}, {"status": "affected", "version": "eaf78265a4ab33935d3a0f1407ce4a91aac4d4d5", "lessThan": "57a01725339f9d82b099102ba2751621b1caab93", "versionType": "git"}, {"status": "affected", "version": "eaf78265a4ab33935d3a0f1407ce4a91aac4d4d5", "lessThan": "d22d2474e3953996f03528b84b7f52cc26a39403", "versionType": "git"}], "programFiles": ["arch/x86/kvm/svm/sev.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "5.7"}, {"status": "unaffected", "version": "0", "lessThan": "5.7", "versionType": "semver"}, {"status": "unaffected", "version": "5.10.124", "versionType": "semver", "lessThanOrEqual": "5.10.*"}, {"status": "unaffected", "version": "5.15.45", "versionType": "semver", "lessThanOrEqual": "5.15.*"}, {"status": "unaffected", "version": "5.17.13", "versionType": "semver", "lessThanOrEqual": "5.17.*"}, {"status": "unaffected", "version": "5.18.2", "versionType": "semver", "lessThanOrEqual": "5.18.*"}, {"status": "unaffected", "version": "5.19", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["arch/x86/kvm/svm/sev.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/401bef1f95de92c3a8c6eece46e02fa88d7285ee"}, {"url": "https://git.kernel.org/stable/c/d8fdb4b24097472ff6b3c0559448200d420b1418"}, {"url": "https://git.kernel.org/stable/c/bbdcc644b59e01e98c68894a9fab42b9687f42b0"}, {"url": "https://git.kernel.org/stable/c/57a01725339f9d82b099102ba2751621b1caab93"}, {"url": "https://git.kernel.org/stable/c/d22d2474e3953996f03528b84b7f52cc26a39403"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: SVM: Use kzalloc for sev ioctl interfaces to prevent kernel data leak\n\nFor some sev ioctl interfaces, the length parameter that is passed maybe\nless than or equal to SEV_FW_BLOB_MAX_SIZE, but larger than the data\nthat PSP firmware returns. In this case, kmalloc will allocate memory\nthat is the size of the input rather than the size of the data.\nSince PSP firmware doesn't fully overwrite the allocated buffer, these\nsev ioctl interface may return uninitialized kernel slab memory."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.10.124", "versionStartIncluding": "5.7"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.15.45", "versionStartIncluding": "5.7"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.17.13", "versionStartIncluding": "5.7"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.18.2", "versionStartIncluding": "5.7"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.19", "versionStartIncluding": "5.7"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T19:02:13.907Z"}}}, "cveMetadata": {"cveId": "CVE-2022-49556", "state": "PUBLISHED", "dateUpdated": "2026-11-05T19:49:40.531Z", "dateReserved": "2025-02-26T02:08:31.590Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2025-02-26T02:14:03.630Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["arch/x86/kvm/svm/sev.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "401bef1f95de92c3a8c6eece46e02fa88d7285ee", "status": "affected", "version": "eaf78265a4ab33935d3a0f1407ce4a91aac4d4d5", "versionType": "git"}, {"lessThan": "d8fdb4b24097472ff6b3c0559448200d420b1418", "status": "affected", "version": "eaf78265a4ab33935d3a0f1407ce4a91aac4d4d5", "versionType": "git"}, {"lessThan": "bbdcc644b59e01e98c68894a9fab42b9687f42b0", "status": "affected", "version": "eaf78265a4ab33935d3a0f1407ce4a91aac4d4d5", "versionType": "git"}, {"lessThan": "57a01725339f9d82b099102ba2751621b1caab93", "status": "affected", "version": "eaf78265a4ab33935d3a0f1407ce4a91aac4d4d5", "versionType": "git"}, {"lessThan": "d22d2474e3953996f03528b84b7f52cc26a39403", "status": "affected", "version": "eaf78265a4ab33935d3a0f1407ce4a91aac4d4d5", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["arch/x86/kvm/svm/sev.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "5.7"}, {"lessThan": "5.7", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.124", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.45", "versionType": "semver"}, {"lessThanOrEqual": "5.17.*", "status": "unaffected", "version": "5.17.13", "versionType": "semver"}, {"lessThanOrEqual": "5.18.*", "status": "unaffected", "version": "5.18.2", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "5.19", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "F22018B5-2F81-4E1A-A764-C1DFE1F98807", "versionEndExcluding": "5.10.124", "versionStartIncluding": "5.7", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "08D699AD-F4CE-4BDD-A97E-4997299C7712", "versionEndExcluding": "5.15.45", "versionStartIncluding": "5.11", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "192FC54B-5367-49D6-B410-0285F14665B1", "versionEndExcluding": "5.17.13", "versionStartIncluding": "5.16", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "9FF255A1-64F4-4E31-AF44-C92FB8773BA2", "versionEndExcluding": "5.18.2", "versionStartIncluding": "5.18", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: SVM: Use kzalloc for sev ioctl interfaces to prevent kernel data leak\n\nFor some sev ioctl interfaces, the length parameter that is passed maybe\nless than or equal to SEV_FW_BLOB_MAX_SIZE, but larger than the data\nthat PSP firmware returns. In this case, kmalloc will allocate memory\nthat is the size of the input rather than the size of the data.\nSince PSP firmware doesn't fully overwrite the allocated buffer, these\nsev ioctl interface may return uninitialized kernel slab memory."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: KVM: SVM: Usar kzalloc para interfaces sev ioctl para evitar fugas de datos del kernel Para algunas interfaces sev ioctl, el par\u00e1metro de longitud que se pasa puede ser menor o igual a SEV_FW_BLOB_MAX_SIZE, pero mayor que los datos que devuelve el firmware de PSP. En este caso, kmalloc asignar\u00e1 memoria que sea del tama\u00f1o de la entrada en lugar del tama\u00f1o de los datos. Dado que el firmware de PSP no sobrescribe por completo el b\u00fafer asignado, estas interfaces sev ioctl pueden devolver memoria de losa de kernel no inicializada."}], "id": "CVE-2022-49556", "lastModified": "2026-11-05T20:17:07.297", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.1, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.2, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2022-49556", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-11-05T19:46:11.191593Z", "version": "2.0.3"}}]}, "published": "2025-02-26T07:01:31.407", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/401bef1f95de92c3a8c6eece46e02fa88d7285ee"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/57a01725339f9d82b099102ba2751621b1caab93"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/bbdcc644b59e01e98c68894a9fab42b9687f42b0"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/d22d2474e3953996f03528b84b7f52cc26a39403"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/d8fdb4b24097472ff6b3c0559448200d420b1418"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: KVM: SVM: Use kzalloc for sev ioctl interfaces to prevent kernel data leak", "id": "2348031", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2348031"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "details": ["In the Linux kernel, the following vulnerability has been resolved:\nKVM: SVM: Use kzalloc for sev ioctl interfaces to prevent kernel data leak\nFor some sev ioctl interfaces, the length parameter that is passed maybe\nless than or equal to SEV_FW_BLOB_MAX_SIZE, but larger than the data\nthat PSP firmware returns. In this case, kmalloc will allocate memory\nthat is the size of the input rather than the size of the data.\nSince PSP firmware doesn't fully overwrite the allocated buffer, these\nsev ioctl interface may return uninitialized kernel slab memory."], "name": "CVE-2022-49556", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Out of support scope", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-02-26T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2022-49556\nhttps://nvd.nist.gov/vuln/detail/CVE-2022-49556\nhttps://lore.kernel.org/linux-cve-announce/2025022617-CVE-2022-49556-9870@gregkh/T"], "threat_severity": "Moderate"}

{"created": "2025-07-13T11:32:28.778174+00:00", "updated": "2025-07-13T11:32:28.778222+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}