CVE-2020-15437

{"containers": {"cna": {"affected": [{"product": "linux kernel", "vendor": "n/a", "versions": [{"status": "affected", "version": "5.7 (verified), possibly others 4.18"}]}], "descriptions": [{"lang": "en", "value": "The Linux kernel before version 5.8 is vulnerable to a NULL pointer dereference in drivers/tty/serial/8250/8250_core.c:serial8250_isa_init_ports() that allows local users to cause a denial of service by using the p->serial_in pointer which uninitialized."}], "problemTypes": [{"descriptions": [{"description": "NULL Pointer Dereference", "lang": "en", "type": "text"}]}], "providerMetadata": {"dateUpdated": "2020-11-23T20:10:28.000Z", "orgId": "7e1ac599-2767-43fa-b3ea-f10178cc98f2", "shortName": "openEuler"}, "references": [{"tags": ["x_refsource_MISC"], "url": "https://lkml.org/lkml/2020/7/21/80"}], "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "securities@openeuler.org", "ID": "CVE-2020-15437", "STATE": "PUBLIC"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "linux kernel", "version": {"version_data": [{"version_value": "5.7 (verified), possibly others 4.18"}]}}]}, "vendor_name": "n/a"}]}}, "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "value": "The Linux kernel before version 5.8 is vulnerable to a NULL pointer dereference in drivers/tty/serial/8250/8250_core.c:serial8250_isa_init_ports() that allows local users to cause a denial of service by using the p->serial_in pointer which uninitialized."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "NULL Pointer Dereference"}]}]}, "references": {"reference_data": [{"name": "https://lkml.org/lkml/2020/7/21/80", "refsource": "MISC", "url": "https://lkml.org/lkml/2020/7/21/80"}]}}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T13:15:20.694Z"}, "title": "CVE Program Container", "references": [{"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://lkml.org/lkml/2020/7/21/80"}]}]}, "cveMetadata": {"assignerOrgId": "7e1ac599-2767-43fa-b3ea-f10178cc98f2", "assignerShortName": "openEuler", "cveId": "CVE-2020-15437", "datePublished": "2020-11-23T20:10:28.000Z", "dateReserved": "2020-06-30T00:00:00.000Z", "dateUpdated": "2024-08-04T13:15:20.694Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.1"}

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{"affected": [{"affectedData": [{"product": "linux kernel", "vendor": "n/a", "versions": [{"status": "affected", "version": "5.7 (verified), possibly others 4.18"}]}], "source": "securities@openeuler.org"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "6A9F82A0-987A-4B8F-A2BB-3BC03ECCCF01", "versionEndExcluding": "5.8", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "The Linux kernel before version 5.8 is vulnerable to a NULL pointer dereference in drivers/tty/serial/8250/8250_core.c:serial8250_isa_init_ports() that allows local users to cause a denial of service by using the p->serial_in pointer which uninitialized."}, {"lang": "es", "value": "El kernel de Linux anterior a versi\u00f3n 5.8 es vulnerable a una desreferencia del puntero NULL en drivers/tty/serial/8250/8250_core.c:serial8250_isa_init_ports() que permite a usuarios locales causar una denegaci\u00f3n de servicio utilizando el puntero p-)serial_in que no se inicializ\u00f3"}], "id": "CVE-2020-15437", "lastModified": "2026-06-17T02:56:40.803", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "LOW", "accessVector": "LOCAL", "authentication": "NONE", "availabilityImpact": "COMPLETE", "baseScore": 4.9, "confidentialityImpact": "NONE", "integrityImpact": "NONE", "vectorString": "AV:L/AC:L/Au:N/C:N/I:N/A:C", "version": "2.0"}, "exploitabilityScore": 3.9, "impactScore": 6.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 4.4, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "HIGH", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 0.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2020-11-23T21:15:11.890", "references": [{"source": "securities@openeuler.org", "tags": ["Exploit", "Patch", "Vendor Advisory"], "url": "https://lkml.org/lkml/2020/7/21/80"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Exploit", "Patch", "Vendor Advisory"], "url": "https://lkml.org/lkml/2020/7/21/80"}], "sourceIdentifier": "securities@openeuler.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-476"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"acknowledgement": "Red Hat would like to thank Yang Yingliang for reporting this issue.", "affected_release": [{"advisory": "RHSA-2021:1739", "cpe": "cpe:/a:redhat:enterprise_linux:8::nfv", "package": "kernel-rt-0:4.18.0-305.rt7.72.el8", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2021-05-18T00:00:00Z"}, {"advisory": "RHSA-2021:1578", "cpe": "cpe:/o:redhat:enterprise_linux:8", "package": "kernel-0:4.18.0-305.el8", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2021-05-18T00:00:00Z"}], "bugzilla": {"description": "kernel: NULL pointer dereference in serial8250_isa_init_ports function in drivers/tty/serial/8250/8250_core.c", "id": "1901161", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1901161"}, "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": "verified"}, "cwe": "CWE-476", "details": ["The Linux kernel before version 5.8 is vulnerable to a NULL pointer dereference in drivers/tty/serial/8250/8250_core.c:serial8250_isa_init_ports() that allows local users to cause a denial of service by using the p->serial_in pointer which uninitialized.", "A NULL pointer dereference flaw was found in the Linux kernel\u2019s UART 8250 functionality, in the way certain hardware architectures handled situations where default ports (0x2E8, 0x2F8, 0x3E8, 0x3F8) are not available. This flaw allows a local user to crash the system. The highest threat from this vulnerability is to system availability."], "name": "CVE-2020-15437", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:5", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 5"}, {"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-alt", "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:/a:redhat:enterprise_mrg:2", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise MRG 2"}], "public_date": "2020-07-21T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2020-15437\nhttps://nvd.nist.gov/vuln/detail/CVE-2020-15437"], "statement": "This flaw is rated as having a Moderate impact because the issue can only be triggered by an authorized local user in the tty or in the dialout group.", "threat_severity": "Moderate"}

{}