CVE-2026-98747

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-98747", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-25T10:25:14.367Z", "datePublished": "2026-10-18T15:47:32.607Z", "dateUpdated": "2026-10-19T09:24:59.721Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T09:24:59.721Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nserial: core: fix NULL pointer dereference in serial_core_unregister_port()\n\nport->port_dev is NULL when no port device is installed: it is cleared\non teardown, and never set if registration failed before\nserial_core_port_device_add(). serial_core_unregister_port() passes it\nstraight to serial_core_get_ctrl_dev(), which dereferences it:\n\n KASAN: null-ptr-deref in range [0x0000000000000040-0x0000000000000047]\n RIP: serial_core_unregister_port\n Call Trace:\n serial8250_unregister_port\n serial8250_remove\n unbind_store\n\nReturn early when there is no port device, and read port->port_dev\nunder port_mutex.\n\nAlso clear port->port_dev on the serial_core_register_port() error\npath, where the port device has already been removed."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/tty/serial/serial_core.c"], "versions": [{"version": "84a9582fd203063cd4d301204971ff2cd8327f1a", "lessThan": "54abbb862366dcaf1f22f1e968358147b7d0547d", "status": "affected", "versionType": "git"}, {"version": "84a9582fd203063cd4d301204971ff2cd8327f1a", "lessThan": "499485a67fbacf4d9afbdb43522388c64f853428", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/tty/serial/serial_core.c"], "versions": [{"version": "6.5", "status": "affected"}, {"version": "0", "lessThan": "6.5", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.10", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3", "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": "6.5", "versionEndExcluding": "7.2.10"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.5", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/54abbb862366dcaf1f22f1e968358147b7d0547d"}, {"url": "https://git.kernel.org/stable/c/499485a67fbacf4d9afbdb43522388c64f853428"}], "title": "serial: core: fix NULL pointer dereference in serial_core_unregister_port()", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/tty/serial/serial_core.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "54abbb862366dcaf1f22f1e968358147b7d0547d", "status": "affected", "version": "84a9582fd203063cd4d301204971ff2cd8327f1a", "versionType": "git"}, {"lessThan": "499485a67fbacf4d9afbdb43522388c64f853428", "status": "affected", "version": "84a9582fd203063cd4d301204971ff2cd8327f1a", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/tty/serial/serial_core.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.5"}, {"lessThan": "6.5", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.10", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nserial: core: fix NULL pointer dereference in serial_core_unregister_port()\n\nport->port_dev is NULL when no port device is installed: it is cleared\non teardown, and never set if registration failed before\nserial_core_port_device_add(). serial_core_unregister_port() passes it\nstraight to serial_core_get_ctrl_dev(), which dereferences it:\n\n KASAN: null-ptr-deref in range [0x0000000000000040-0x0000000000000047]\n RIP: serial_core_unregister_port\n Call Trace:\n serial8250_unregister_port\n serial8250_remove\n unbind_store\n\nReturn early when there is no port device, and read port->port_dev\nunder port_mutex.\n\nAlso clear port->port_dev on the serial_core_register_port() error\npath, where the port device has already been removed."}], "id": "CVE-2026-98747", "lastModified": "2026-10-19T10:19:38.883", "metrics": {}, "published": "2026-10-18T16:17:28.460", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/499485a67fbacf4d9afbdb43522388c64f853428"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/54abbb862366dcaf1f22f1e968358147b7d0547d"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: serial: core: fix NULL pointer dereference in serial_core_unregister_port()", "id": "2555181", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2555181"}, "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-476", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nserial: core: fix NULL pointer dereference in serial_core_unregister_port()\nport->port_dev is NULL when no port device is installed: it is cleared\non teardown, and never set if registration failed before\nserial_core_port_device_add(). serial_core_unregister_port() passes it\nstraight to serial_core_get_ctrl_dev(), which dereferences it:\nKASAN: null-ptr-deref in range [0x0000000000000040-0x0000000000000047]\nRIP: serial_core_unregister_port\nCall Trace:\nserial8250_unregister_port\nserial8250_remove\nunbind_store\nReturn early when there is no port device, and read port->port_dev\nunder port_mutex.\nAlso clear port->port_dev on the serial_core_register_port() error\npath, where the port device has already been removed.", "A flaw was found in the Linux kernel's serial core subsystem. This flaw allows a local user with administrative access to cause a Denial of Service (DoS) by crashing the system. The issue occurs during the unregistration of a serial port that failed during initial setup or was previously torn down, causing the kernel to improperly access an empty memory address (NULL pointer dereference). This invalid access triggers a kernel crash, disrupting system availability."], "name": "CVE-2026-98747", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "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": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "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": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Not affected", "package_name": "openshift/ose-rhel-coreos-8", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "openshift/ose-rhel-coreos-9", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-10-18T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-98747\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-98747\nhttps://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98747.mbox"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[84a9582fd203063cd4d301204971ff2cd8327f1a,54abbb862366dcaf1f22f1e968358147b7d0547d)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[84a9582fd203063cd4d301204971ff2cd8327f1a,499485a67fbacf4d9afbdb43522388c64f853428)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "6.5"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,6.5)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.10,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.3,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-10-18T22:15:14.434819+00:00", "updated": "2026-10-23T14:15:07.101698+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-476"]}