{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-98751", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-25T10:25:14.368Z", "datePublished": "2026-10-18T15:47:36.026Z", "dateUpdated": "2026-10-30T12:39:21.567Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-30T12:39:21.567Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntty: abort break signalling on hangup\n\nThe break ioctls can race with hangup and end up calling into a tty\ndriver for a device that is already gone or powered down.\n\nDrivers must handle this race, but TCSBRK and TCSBRKP should still be\naborted to avoid calling back into the driver after a user-controlled\ntimeout (possibly even after the tty has been reopened).\n\nNote that drivers should disable any break state on shutdown so just\nreturn on hangup (calling break_ctl() again is racy and will most likely\nfail for drivers handling the race)."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/tty/tty_io.c", "include/linux/tty.h"], "versions": [{"version": "f34d7a5b7010b82fe97da95496b9971435530062", "lessThan": "70fa2bec352d9f949b882af3c380b916e4a29a43", "status": "affected", "versionType": "git"}, {"version": "f34d7a5b7010b82fe97da95496b9971435530062", "lessThan": "8224d25534580d07925607bbd617daf9c8de26c3", "status": "affected", "versionType": "git"}, {"version": "f34d7a5b7010b82fe97da95496b9971435530062", "lessThan": "8a0f0f9ef41cb80de4d5da4ae146df3075463f6b", "status": "affected", "versionType": "git"}, {"version": "f34d7a5b7010b82fe97da95496b9971435530062", "lessThan": "6c9c9367351a461d62e5c0a39bffdcfbb40f068b", "status": "affected", "versionType": "git"}, {"version": "f34d7a5b7010b82fe97da95496b9971435530062", "lessThan": "3bc82999fb85cecc7eb6ec1755ee7d698aa1e783", "status": "affected", "versionType": "git"}, {"version": "f34d7a5b7010b82fe97da95496b9971435530062", "lessThan": "94af6cd832e9b4ce39a8fb59144a8f09ab56fd35", "status": "affected", "versionType": "git"}, {"version": "f34d7a5b7010b82fe97da95496b9971435530062", "lessThan": "c8ccd3b2013daaf77b98f8a6724fcf4d2c5c52d6", "status": "affected", "versionType": "git"}, {"version": "f34d7a5b7010b82fe97da95496b9971435530062", "lessThan": "845a2737e0f5ffe5ca8d38de556012b0c9472cdd", "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/tty_io.c", "include/linux/tty.h"], "versions": [{"version": "2.6.26", "status": "affected"}, {"version": "0", "lessThan": "2.6.26", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.273", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.224", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.191", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.160", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.113", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.56", "lessThanOrEqual": "6.18.*", "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": "2.6.26", "versionEndExcluding": "5.10.273"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.26", "versionEndExcluding": "5.15.224"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.26", "versionEndExcluding": "6.1.191"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.26", "versionEndExcluding": "6.6.160"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.26", "versionEndExcluding": "6.12.113"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.26", "versionEndExcluding": "6.18.56"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.26", 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{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/tty/tty_io.c", "include/linux/tty.h"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "70fa2bec352d9f949b882af3c380b916e4a29a43", "status": "affected", "version": "f34d7a5b7010b82fe97da95496b9971435530062", "versionType": "git"}, {"lessThan": "8224d25534580d07925607bbd617daf9c8de26c3", "status": "affected", "version": "f34d7a5b7010b82fe97da95496b9971435530062", "versionType": "git"}, {"lessThan": "8a0f0f9ef41cb80de4d5da4ae146df3075463f6b", "status": "affected", "version": "f34d7a5b7010b82fe97da95496b9971435530062", "versionType": "git"}, {"lessThan": "6c9c9367351a461d62e5c0a39bffdcfbb40f068b", "status": "affected", "version": "f34d7a5b7010b82fe97da95496b9971435530062", "versionType": "git"}, {"lessThan": "3bc82999fb85cecc7eb6ec1755ee7d698aa1e783", "status": "affected", "version": "f34d7a5b7010b82fe97da95496b9971435530062", "versionType": "git"}, {"lessThan": "94af6cd832e9b4ce39a8fb59144a8f09ab56fd35", "status": "affected", "version": "f34d7a5b7010b82fe97da95496b9971435530062", "versionType": "git"}, {"lessThan": "c8ccd3b2013daaf77b98f8a6724fcf4d2c5c52d6", "status": "affected", "version": "f34d7a5b7010b82fe97da95496b9971435530062", "versionType": "git"}, {"lessThan": "845a2737e0f5ffe5ca8d38de556012b0c9472cdd", "status": "affected", "version": "f34d7a5b7010b82fe97da95496b9971435530062", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/tty/tty_io.c", "include/linux/tty.h"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "2.6.26"}, {"lessThan": "2.6.26", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.273", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.224", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.191", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.160", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.113", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.56", "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\ntty: abort break signalling on hangup\n\nThe break ioctls can race with hangup and end up calling into a tty\ndriver for a device that is already gone or powered down.\n\nDrivers must handle this race, but TCSBRK and TCSBRKP should still be\naborted to avoid calling back into the driver after a user-controlled\ntimeout (possibly even after the tty has been reopened).\n\nNote that drivers should disable any break state on shutdown so just\nreturn on hangup (calling break_ctl() again is racy and will most likely\nfail for drivers handling the race)."}], "id": "CVE-2026-98751", "lastModified": "2026-10-30T13:21:23.950", "metrics": {}, "published": "2026-10-18T16:17:28.880", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/3bc82999fb85cecc7eb6ec1755ee7d698aa1e783"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6c9c9367351a461d62e5c0a39bffdcfbb40f068b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/70fa2bec352d9f949b882af3c380b916e4a29a43"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/8224d25534580d07925607bbd617daf9c8de26c3"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/845a2737e0f5ffe5ca8d38de556012b0c9472cdd"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/8a0f0f9ef41cb80de4d5da4ae146df3075463f6b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/94af6cd832e9b4ce39a8fb59144a8f09ab56fd35"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/c8ccd3b2013daaf77b98f8a6724fcf4d2c5c52d6"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: tty: abort break signalling on hangup", "id": "2555161", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2555161"}, "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"}, "cwe": "CWE-366", "details": ["In the Linux kernel, the following vulnerability has been resolved:\ntty: abort break signalling on hangup\nThe break ioctls can race with hangup and end up calling into a tty\ndriver for a device that is already gone or powered down.\nDrivers must handle this race, but TCSBRK and TCSBRKP should still be\naborted to avoid calling back into the driver after a user-controlled\ntimeout (possibly even after the tty has been reopened).\nNote that drivers should disable any break state on shutdown so just\nreturn on hangup (calling break_ctl() again is racy and will most likely\nfail for drivers handling the race).", "A flaw was found in the Linux kernel's terminal (tty) subsystem. A race condition can occur when a terminal hangup interrupts an active break signaling operation, causing the kernel to communicate with a device driver after the device has already disconnected or powered down. A local attacker could exploit this vulnerability by issuing break commands during a terminal hangup to trigger a system crash, resulting in a Denial of Service (DoS)."], "name": "CVE-2026-98751", "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": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "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"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "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-2026-98751\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-98751\nhttps://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98751.mbox"], "threat_severity": "Moderate"}