CVE-2026-98457

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-98457", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-25T10:25:14.350Z", "datePublished": "2026-10-18T15:15:06.718Z", "dateUpdated": "2026-10-19T09:19:53.885Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T09:19:53.885Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: L2CAP: validate frame length before control and FCS access\n\nl2cap_data_rcv() unpacks either a two-byte or four-byte control field\nwithout first ensuring that it is present. A short ERTM or streaming-mode\nframe can therefore cause an out-of-bounds read.\n\nThere is a second short-frame case when CRC16 is enabled. After the\ncontrol field is pulled, l2cap_check_fcs() subtracts two from skb->len\nwithout checking it. If fewer than two bytes remain, the subtraction\nwraps; skb_trim() leaves the buffer unchanged and the subsequent FCS\nload reads past the logical end of the frame.\n\nValidate that the frame contains both its control field and, when\nenabled, its FCS before either field is accessed."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/bluetooth/l2cap_core.c"], "versions": [{"version": "1c2acffb76d4bc5fd27c4ea55cc27ad8ead10f9a", "lessThan": "4373ba79a267947e771c438507f7b103e30bdb21", "status": "affected", "versionType": "git"}, {"version": "1c2acffb76d4bc5fd27c4ea55cc27ad8ead10f9a", "lessThan": "965bd88ed4b4763cb765dd65885adcfa588c6b14", "status": "affected", "versionType": "git"}, {"version": "1c2acffb76d4bc5fd27c4ea55cc27ad8ead10f9a", "lessThan": "3acf6a0038ec0d4e8f4dcbfc2a557dff5f61cb70", "status": "affected", "versionType": "git"}, {"version": "1c2acffb76d4bc5fd27c4ea55cc27ad8ead10f9a", "lessThan": "8c7556c7cd17e073bbefdc4a9a4694a207544c37", "status": "affected", "versionType": "git"}, {"version": "1c2acffb76d4bc5fd27c4ea55cc27ad8ead10f9a", "lessThan": "1fdbb2a712a9a162ee817c959740face80b3d929", "status": "affected", "versionType": "git"}, {"version": "1c2acffb76d4bc5fd27c4ea55cc27ad8ead10f9a", "lessThan": "c6a288e6001bcce16553c3853e0f5a45eaaf85c7", "status": "affected", "versionType": "git"}, {"version": "1c2acffb76d4bc5fd27c4ea55cc27ad8ead10f9a", "lessThan": "f557274af7b94b6134692e6f26b880f1e34c15bf", "status": "affected", "versionType": "git"}, {"version": "1c2acffb76d4bc5fd27c4ea55cc27ad8ead10f9a", "lessThan": "6c78a213d9070b610c7f418af2c25b66180b7e37", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/bluetooth/l2cap_core.c"], "versions": [{"version": "2.6.32", "status": "affected"}, {"version": "0", "lessThan": "2.6.32", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.271", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.222", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.189", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.158", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.112", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.55", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.9", "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": "2.6.32", "versionEndExcluding": "5.10.271"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.32", "versionEndExcluding": "5.15.222"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.32", "versionEndExcluding": "6.1.189"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.32", "versionEndExcluding": "6.6.158"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.32", "versionEndExcluding": "6.12.112"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.32", "versionEndExcluding": "6.18.55"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.32", "versionEndExcluding": "7.2.9"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.32", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/4373ba79a267947e771c438507f7b103e30bdb21"}, {"url": "https://git.kernel.org/stable/c/965bd88ed4b4763cb765dd65885adcfa588c6b14"}, {"url": "https://git.kernel.org/stable/c/3acf6a0038ec0d4e8f4dcbfc2a557dff5f61cb70"}, {"url": "https://git.kernel.org/stable/c/8c7556c7cd17e073bbefdc4a9a4694a207544c37"}, {"url": "https://git.kernel.org/stable/c/1fdbb2a712a9a162ee817c959740face80b3d929"}, {"url": "https://git.kernel.org/stable/c/c6a288e6001bcce16553c3853e0f5a45eaaf85c7"}, {"url": "https://git.kernel.org/stable/c/f557274af7b94b6134692e6f26b880f1e34c15bf"}, {"url": "https://git.kernel.org/stable/c/6c78a213d9070b610c7f418af2c25b66180b7e37"}], "title": "Bluetooth: L2CAP: validate frame length before control and FCS access", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["net/bluetooth/l2cap_core.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "4373ba79a267947e771c438507f7b103e30bdb21", "status": "affected", "version": "1c2acffb76d4bc5fd27c4ea55cc27ad8ead10f9a", "versionType": "git"}, {"lessThan": "965bd88ed4b4763cb765dd65885adcfa588c6b14", "status": "affected", "version": "1c2acffb76d4bc5fd27c4ea55cc27ad8ead10f9a", "versionType": "git"}, {"lessThan": "3acf6a0038ec0d4e8f4dcbfc2a557dff5f61cb70", "status": "affected", "version": "1c2acffb76d4bc5fd27c4ea55cc27ad8ead10f9a", "versionType": "git"}, {"lessThan": "8c7556c7cd17e073bbefdc4a9a4694a207544c37", "status": "affected", "version": "1c2acffb76d4bc5fd27c4ea55cc27ad8ead10f9a", "versionType": "git"}, {"lessThan": "1fdbb2a712a9a162ee817c959740face80b3d929", "status": "affected", "version": "1c2acffb76d4bc5fd27c4ea55cc27ad8ead10f9a", "versionType": "git"}, {"lessThan": "c6a288e6001bcce16553c3853e0f5a45eaaf85c7", "status": "affected", "version": "1c2acffb76d4bc5fd27c4ea55cc27ad8ead10f9a", "versionType": "git"}, {"lessThan": "f557274af7b94b6134692e6f26b880f1e34c15bf", "status": "affected", "version": "1c2acffb76d4bc5fd27c4ea55cc27ad8ead10f9a", "versionType": "git"}, {"lessThan": "6c78a213d9070b610c7f418af2c25b66180b7e37", "status": "affected", "version": "1c2acffb76d4bc5fd27c4ea55cc27ad8ead10f9a", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["net/bluetooth/l2cap_core.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "2.6.32"}, {"lessThan": "2.6.32", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.271", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.222", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.189", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.158", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.112", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.55", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.9", "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\nBluetooth: L2CAP: validate frame length before control and FCS access\n\nl2cap_data_rcv() unpacks either a two-byte or four-byte control field\nwithout first ensuring that it is present. A short ERTM or streaming-mode\nframe can therefore cause an out-of-bounds read.\n\nThere is a second short-frame case when CRC16 is enabled. After the\ncontrol field is pulled, l2cap_check_fcs() subtracts two from skb->len\nwithout checking it. If fewer than two bytes remain, the subtraction\nwraps; skb_trim() leaves the buffer unchanged and the subsequent FCS\nload reads past the logical end of the frame.\n\nValidate that the frame contains both its control field and, when\nenabled, its FCS before either field is accessed."}], "id": "CVE-2026-98457", "lastModified": "2026-10-19T10:18:55.100", "metrics": {}, "published": "2026-10-18T16:16:56.110", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/1fdbb2a712a9a162ee817c959740face80b3d929"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/3acf6a0038ec0d4e8f4dcbfc2a557dff5f61cb70"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/4373ba79a267947e771c438507f7b103e30bdb21"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6c78a213d9070b610c7f418af2c25b66180b7e37"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/8c7556c7cd17e073bbefdc4a9a4694a207544c37"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/965bd88ed4b4763cb765dd65885adcfa588c6b14"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/c6a288e6001bcce16553c3853e0f5a45eaaf85c7"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/f557274af7b94b6134692e6f26b880f1e34c15bf"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: Bluetooth: L2CAP: validate frame length before control and FCS access", "id": "2554889", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2554889"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.5", "cvss3_scoring_vector": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-125", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nBluetooth: L2CAP: validate frame length before control and FCS access\nl2cap_data_rcv() unpacks either a two-byte or four-byte control field\nwithout first ensuring that it is present. A short ERTM or streaming-mode\nframe can therefore cause an out-of-bounds read.\nThere is a second short-frame case when CRC16 is enabled. After the\ncontrol field is pulled, l2cap_check_fcs() subtracts two from skb->len\nwithout checking it. If fewer than two bytes remain, the subtraction\nwraps; skb_trim() leaves the buffer unchanged and the subsequent FCS\nload reads past the logical end of the frame.\nValidate that the frame contains both its control field and, when\nenabled, its FCS before either field is accessed.", "A flaw was found in the Linux kernel's Bluetooth Logical Link Control and Adaptation Protocol (L2CAP) implementation. An adjacent attacker within Bluetooth range could exploit this vulnerability by transmitting specially crafted, undersized network frames. Because the kernel fails to validate packet length before processing control and Frame Check Sequence (FCS) fields, an out-of-bounds read occurs. This flaw primarily results in a system crash, leading to a Denial of Service (DoS), and may potentially expose sensitive kernel memory."], "name": "CVE-2026-98457", "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-2026-98457\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-98457\nhttps://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98457.mbox"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1c2acffb76d4bc5fd27c4ea55cc27ad8ead10f9a,4373ba79a267947e771c438507f7b103e30bdb21)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1c2acffb76d4bc5fd27c4ea55cc27ad8ead10f9a,965bd88ed4b4763cb765dd65885adcfa588c6b14)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1c2acffb76d4bc5fd27c4ea55cc27ad8ead10f9a,3acf6a0038ec0d4e8f4dcbfc2a557dff5f61cb70)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1c2acffb76d4bc5fd27c4ea55cc27ad8ead10f9a,8c7556c7cd17e073bbefdc4a9a4694a207544c37)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1c2acffb76d4bc5fd27c4ea55cc27ad8ead10f9a,1fdbb2a712a9a162ee817c959740face80b3d929)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1c2acffb76d4bc5fd27c4ea55cc27ad8ead10f9a,c6a288e6001bcce16553c3853e0f5a45eaaf85c7)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1c2acffb76d4bc5fd27c4ea55cc27ad8ead10f9a,f557274af7b94b6134692e6f26b880f1e34c15bf)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1c2acffb76d4bc5fd27c4ea55cc27ad8ead10f9a,6c78a213d9070b610c7f418af2c25b66180b7e37)"}}], "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": "2.6.32"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,2.6.32)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.10.271,5.11.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.15.222,5.16.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.1.189,6.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.158,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.112,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.55,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.9,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.3-rc5,*)"}}], "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": "2026-10-18T17:00:09.235011+00:00", "updated": "2026-10-20T12:30:06.359511+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}