{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"cveId": "CVE-2022-49873", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-05-01T14:05:17.238Z", "datePublished": "2025-05-01T14:10:23.128Z", "dateUpdated": "2025-10-01T16:03:45.940Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2025-05-04T08:47:26.429Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Fix wrong reg type conversion in release_reference()\n\nSome helper functions will allocate memory. To avoid memory leaks, the\nverifier requires the eBPF program to release these memories by calling\nthe corresponding helper functions.\n\nWhen a resource is released, all pointer registers corresponding to the\nresource should be invalidated. 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To avoid memory leaks, the\nverifier requires the eBPF program to release these memories by calling\nthe corresponding helper functions.\n\nWhen a resource is released, all pointer registers corresponding to the\nresource should be invalidated. The verifier use release_references() to\ndo this job, by apply __mark_reg_unknown() to each relevant register.\n\nIt will give these registers the type of SCALAR_VALUE. A register that\nwill contain a pointer value at runtime, but of type SCALAR_VALUE, which\nmay allow the unprivileged user to get a kernel pointer by storing this\nregister into a map.\n\nUsing __mark_reg_not_init() while NOT allow_ptr_leaks can mitigate this\nproblem."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: bpf: Arreglar conversi\u00f3n de tipo de registro incorrecta en release_reference() Algunas funciones auxiliares asignar\u00e1n memoria. Para evitar fugas de memoria, el verificador requiere que el programa eBPF libere estas memorias llamando a las funciones auxiliares correspondientes. Cuando se libera un recurso, todos los registros de puntero correspondientes al recurso deben invalidarse. El verificador usa release_references() para realizar este trabajo, aplicando __mark_reg_unknown() a cada registro relevante. Les dar\u00e1 a estos registros el tipo SCALAR_VALUE. Un registro que contendr\u00e1 un valor de puntero en tiempo de ejecuci\u00f3n, pero de tipo SCALAR_VALUE, puede permitir que el usuario sin privilegios obtenga un puntero del kernel almacenando este registro en un mapa. Usar __mark_reg_not_init() mientras NO allow_ptr_leaks puede mitigar este problema."}], "id": "CVE-2022-49873", "lastModified": "2025-10-01T16:15:48.520", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}, "published": "2025-05-01T15:16:12.240", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/466ce46f251dfb259a8cbaa895ab9edd6fb56240"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/ae5ccad6c711db0f2ca1231be051935dd128b8f5"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/cedd4f01f67be94735f15123158f485028571037"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/f1db20814af532f85e091231223e5e4818e8464b"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-704"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-704"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{"bugzilla": {"description": "kernel: bpf: Fix wrong reg type conversion in release_reference()", "id": "2363467", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2363467"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.4", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-704", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nbpf: Fix wrong reg type conversion in release_reference()\nSome helper functions will allocate memory. To avoid memory leaks, the\nverifier requires the eBPF program to release these memories by calling\nthe corresponding helper functions.\nWhen a resource is released, all pointer registers corresponding to the\nresource should be invalidated. The verifier use release_references() to\ndo this job, by apply __mark_reg_unknown() to each relevant register.\nIt will give these registers the type of SCALAR_VALUE. A register that\nwill contain a pointer value at runtime, but of type SCALAR_VALUE, which\nmay allow the unprivileged user to get a kernel pointer by storing this\nregister into a map.\nUsing __mark_reg_not_init() while NOT allow_ptr_leaks can mitigate this\nproblem."], "name": "CVE-2022-49873", "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": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "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": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-05-01T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2022-49873\nhttps://nvd.nist.gov/vuln/detail/CVE-2022-49873\nhttps://lore.kernel.org/linux-cve-announce/2025050151-CVE-2022-49873-2733@gregkh/T"], "threat_severity": "Moderate"}