{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-98754", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-25T10:25:14.368Z", "datePublished": "2026-10-18T15:47:40.255Z", "dateUpdated": "2026-10-30T12:39:24.788Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-30T12:39:24.788Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntty: vcc: hold port lock when clearing tty pointer in vcc_cleanup\n\nvcc_cleanup() sets port->tty to NULL without holding port->lock, racing\nwith vcc_event() LDC callbacks that read port->tty under port->lock and\nthen use tty->port. This can cause a use-after-free when the callback\ndereferences tty->port after cleanup has already destroyed and freed it."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/tty/vcc.c"], "versions": [{"version": "8f03f948ba356b7cb254b45a4e78b5b3d86fd3bb", "lessThan": "b0ad9d025c3229a628a82fbaa7578891075a950d", "status": "affected", "versionType": "git"}, {"version": "8f03f948ba356b7cb254b45a4e78b5b3d86fd3bb", "lessThan": "b193617080b7036d143674089bcfb7d2ba3db588", "status": "affected", "versionType": "git"}, {"version": "8f03f948ba356b7cb254b45a4e78b5b3d86fd3bb", "lessThan": "afcbb821c571f39b273127a7c7d26cb2cef27d2f", "status": "affected", "versionType": "git"}, {"version": "8f03f948ba356b7cb254b45a4e78b5b3d86fd3bb", "lessThan": "57753441ef84bee3bf0e9ee1e3778d119c44aa32", "status": "affected", "versionType": "git"}, {"version": "8f03f948ba356b7cb254b45a4e78b5b3d86fd3bb", "lessThan": "88f6ecb058801e9ce7b9aabc966530118d7cd53c", "status": "affected", "versionType": "git"}, {"version": "8f03f948ba356b7cb254b45a4e78b5b3d86fd3bb", "lessThan": "821050631750e982007c0856c119346edba51cae", "status": "affected", "versionType": "git"}, {"version": "8f03f948ba356b7cb254b45a4e78b5b3d86fd3bb", "lessThan": "1a9fb9eaeb69b1f6c00bed09289a33d9fe1e7ae4", "status": "affected", "versionType": "git"}, {"version": "8f03f948ba356b7cb254b45a4e78b5b3d86fd3bb", "lessThan": "03b49c991abb8d021ca6fe51cd173447236b0552", "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/vcc.c"], "versions": [{"version": "4.14", "status": "affected"}, {"version": "0", "lessThan": "4.14", "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": "4.14", "versionEndExcluding": "5.10.273"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.14", "versionEndExcluding": "5.15.224"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.14", "versionEndExcluding": "6.1.191"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.14", "versionEndExcluding": "6.6.160"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.14", "versionEndExcluding": "6.12.113"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.14", "versionEndExcluding": "6.18.56"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.14", "versionEndExcluding": "7.2.10"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.14", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/b0ad9d025c3229a628a82fbaa7578891075a950d"}, {"url": "https://git.kernel.org/stable/c/b193617080b7036d143674089bcfb7d2ba3db588"}, {"url": "https://git.kernel.org/stable/c/afcbb821c571f39b273127a7c7d26cb2cef27d2f"}, {"url": "https://git.kernel.org/stable/c/57753441ef84bee3bf0e9ee1e3778d119c44aa32"}, {"url": "https://git.kernel.org/stable/c/88f6ecb058801e9ce7b9aabc966530118d7cd53c"}, {"url": "https://git.kernel.org/stable/c/821050631750e982007c0856c119346edba51cae"}, {"url": "https://git.kernel.org/stable/c/1a9fb9eaeb69b1f6c00bed09289a33d9fe1e7ae4"}, {"url": "https://git.kernel.org/stable/c/03b49c991abb8d021ca6fe51cd173447236b0552"}], "title": "tty: vcc: hold port lock when clearing tty pointer in vcc_cleanup", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/tty/vcc.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "b0ad9d025c3229a628a82fbaa7578891075a950d", "status": "affected", "version": "8f03f948ba356b7cb254b45a4e78b5b3d86fd3bb", "versionType": "git"}, {"lessThan": "b193617080b7036d143674089bcfb7d2ba3db588", "status": "affected", "version": "8f03f948ba356b7cb254b45a4e78b5b3d86fd3bb", "versionType": "git"}, {"lessThan": "afcbb821c571f39b273127a7c7d26cb2cef27d2f", "status": "affected", "version": "8f03f948ba356b7cb254b45a4e78b5b3d86fd3bb", "versionType": "git"}, {"lessThan": "57753441ef84bee3bf0e9ee1e3778d119c44aa32", "status": "affected", "version": "8f03f948ba356b7cb254b45a4e78b5b3d86fd3bb", "versionType": "git"}, {"lessThan": "88f6ecb058801e9ce7b9aabc966530118d7cd53c", "status": "affected", "version": "8f03f948ba356b7cb254b45a4e78b5b3d86fd3bb", "versionType": "git"}, {"lessThan": "821050631750e982007c0856c119346edba51cae", "status": "affected", "version": "8f03f948ba356b7cb254b45a4e78b5b3d86fd3bb", "versionType": "git"}, {"lessThan": "1a9fb9eaeb69b1f6c00bed09289a33d9fe1e7ae4", "status": "affected", "version": "8f03f948ba356b7cb254b45a4e78b5b3d86fd3bb", "versionType": "git"}, {"lessThan": "03b49c991abb8d021ca6fe51cd173447236b0552", "status": "affected", "version": "8f03f948ba356b7cb254b45a4e78b5b3d86fd3bb", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/tty/vcc.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "4.14"}, {"lessThan": "4.14", "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: vcc: hold port lock when clearing tty pointer in vcc_cleanup\n\nvcc_cleanup() sets port->tty to NULL without holding port->lock, racing\nwith vcc_event() LDC callbacks that read port->tty under port->lock and\nthen use tty->port. This can cause a use-after-free when the callback\ndereferences tty->port after cleanup has already destroyed and freed it."}], "id": "CVE-2026-98754", "lastModified": "2026-10-30T13:21:24.457", "metrics": {}, "published": "2026-10-18T16:17:29.203", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/03b49c991abb8d021ca6fe51cd173447236b0552"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/1a9fb9eaeb69b1f6c00bed09289a33d9fe1e7ae4"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/57753441ef84bee3bf0e9ee1e3778d119c44aa32"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/821050631750e982007c0856c119346edba51cae"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/88f6ecb058801e9ce7b9aabc966530118d7cd53c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/afcbb821c571f39b273127a7c7d26cb2cef27d2f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b0ad9d025c3229a628a82fbaa7578891075a950d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b193617080b7036d143674089bcfb7d2ba3db588"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: tty: vcc: hold port lock when clearing tty pointer in vcc_cleanup", "id": "2555120", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2555120"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-825", "details": ["In the Linux kernel, the following vulnerability has been resolved:\ntty: vcc: hold port lock when clearing tty pointer in vcc_cleanup\nvcc_cleanup() sets port->tty to NULL without holding port->lock, racing\nwith vcc_event() LDC callbacks that read port->tty under port->lock and\nthen use tty->port. This can cause a use-after-free when the callback\ndereferences tty->port after cleanup has already destroyed and freed it.", "A flaw was found in the Linux kernel's Virtual Console Concentrator (VCC) driver. An omission in locking allows a race condition to occur between device cleanup operations and asynchronous event callbacks. A local attacker could exploit this timing issue to cause a use-after-free condition, potentially leading to a system crash and Denial of Service (DoS)."], "name": "CVE-2026-98754", "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": "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": "Not affected", "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": "Not affected", "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-2026-98754\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-98754\nhttps://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98754.mbox"], "threat_severity": "Moderate"}