CVE-2026-98246

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-98246", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-25T10:25:14.330Z", "datePublished": "2026-10-06T08:45:15.411Z", "dateUpdated": "2026-10-19T09:16:17.812Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T09:16:17.812Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_sync: Serialize local codec list cleanup\n\nhci_dev_close_sync() clears hdev->local_codecs after releasing hdev->lock.\nCodec list additions and both traversals in sco_sock_getsockopt() use that\nlock, but the close path does not. A close and BT_CODEC query can therefore\ninterleave as follows:\n\n hci_dev_close_sync() sco_sock_getsockopt()\n hci_dev_lock()\n fetch codec entry\n hci_codec_list_clear()\n kfree(entry)\n read entry->id\n\nThe reader then accesses an entry which the close path has freed. KASAN\n\n BUG: KASAN: slab-use-after-free in sco_sock_getsockopt+0xfa0/0xfe0\n Read of size 1 at addr ffff8881001c3450\n Call Trace:\n sco_sock_getsockopt+0xfa0/0xfe0\n do_sock_getsockopt+0x537/0x7b0\n __sys_getsockopt+0xf2/0x170\n Allocated by task 92:\n hci_codec_list_add.isra.0+0x2c/0x440\n hci_read_codec_capabilities+0x224/0x590\n hci_read_supported_codecs+0x2c2/0x640\n Freed by task 92:\n kfree+0x131/0x3c0\n hci_codec_list_clear+0xd8/0x160\n hci_dev_close_sync+0x92a/0xfa0\n\nTake hdev->lock around the clear operation at its existing point in the\nclose path. This makes the clear wait for active readers and prevents a new\ntraversal until the list is empty without changing teardown ordering."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/bluetooth/hci_sync.c"], "versions": [{"version": "626535077ba9dc110787540d1fe24881094c15a1", "lessThan": "9f407d52c0d881430d689836d3e7d32aa36f98b5", "status": "affected", "versionType": "git"}, {"version": "b938790e70540bf4f2e653dcd74b232494d06c8f", "lessThan": "560ed4373c06a58123ecdf9ad5ecaddc87a73382", "status": "affected", "versionType": "git"}, {"version": "b938790e70540bf4f2e653dcd74b232494d06c8f", "lessThan": "1ee0c5429dc4a92879bda2554b1bfd4abc6c587c", "status": "affected", "versionType": "git"}, {"version": "b938790e70540bf4f2e653dcd74b232494d06c8f", "lessThan": "4dc1ae5ff75b17e17ec4b74b11cc4b0099e71e00", "status": "affected", "versionType": "git"}, {"version": "b938790e70540bf4f2e653dcd74b232494d06c8f", "lessThan": "1276c2fafd18499769a28f96f45c5a76d6fc990e", "status": "affected", "versionType": "git"}, {"version": "b938790e70540bf4f2e653dcd74b232494d06c8f", "lessThan": "9a10987a2f160a44a638c9a35994ca6e3089696e", "status": "affected", "versionType": "git"}, {"version": "eea5a8f0c3b7c884d2351e75fbdd0a3d7def5ae1", "status": "affected", "versionType": "git"}, {"version": "6.1.57", "lessThan": "6.1.189", "status": "affected", "versionType": "semver"}, {"version": "6.5.7", "lessThan": "6.6", "status": "affected", "versionType": "semver"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/bluetooth/hci_sync.c"], "versions": [{"version": "6.6", "status": "affected"}, {"version": "0", "lessThan": "6.6", "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": "6.18.54", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.8", "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": "6.1.57", "versionEndExcluding": "6.1.189"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6", "versionEndExcluding": "6.6.158"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6", "versionEndExcluding": "6.12.112"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6", "versionEndExcluding": "6.18.54"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6", "versionEndExcluding": "7.2.8"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6", "versionEndExcluding": "7.3"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.5.7"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/9f407d52c0d881430d689836d3e7d32aa36f98b5"}, {"url": "https://git.kernel.org/stable/c/560ed4373c06a58123ecdf9ad5ecaddc87a73382"}, {"url": "https://git.kernel.org/stable/c/1ee0c5429dc4a92879bda2554b1bfd4abc6c587c"}, {"url": "https://git.kernel.org/stable/c/4dc1ae5ff75b17e17ec4b74b11cc4b0099e71e00"}, {"url": "https://git.kernel.org/stable/c/1276c2fafd18499769a28f96f45c5a76d6fc990e"}, {"url": "https://git.kernel.org/stable/c/9a10987a2f160a44a638c9a35994ca6e3089696e"}], "title": "Bluetooth: hci_sync: Serialize local codec list cleanup", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["net/bluetooth/hci_sync.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "9f407d52c0d881430d689836d3e7d32aa36f98b5", "status": "affected", "version": "626535077ba9dc110787540d1fe24881094c15a1", "versionType": "git"}, {"lessThan": "560ed4373c06a58123ecdf9ad5ecaddc87a73382", "status": "affected", "version": "b938790e70540bf4f2e653dcd74b232494d06c8f", "versionType": "git"}, {"lessThan": "1ee0c5429dc4a92879bda2554b1bfd4abc6c587c", "status": "affected", "version": "b938790e70540bf4f2e653dcd74b232494d06c8f", "versionType": "git"}, {"lessThan": "4dc1ae5ff75b17e17ec4b74b11cc4b0099e71e00", "status": "affected", "version": "b938790e70540bf4f2e653dcd74b232494d06c8f", "versionType": "git"}, {"lessThan": "1276c2fafd18499769a28f96f45c5a76d6fc990e", "status": "affected", "version": "b938790e70540bf4f2e653dcd74b232494d06c8f", "versionType": "git"}, {"lessThan": "9a10987a2f160a44a638c9a35994ca6e3089696e", "status": "affected", "version": "b938790e70540bf4f2e653dcd74b232494d06c8f", "versionType": "git"}, {"status": "affected", "version": "eea5a8f0c3b7c884d2351e75fbdd0a3d7def5ae1", "versionType": "git"}, {"lessThan": "6.1.189", "status": "affected", "version": "6.1.57", "versionType": "semver"}, {"lessThan": "6.6", "status": "affected", "version": "6.5.7", "versionType": "semver"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["net/bluetooth/hci_sync.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.6"}, {"lessThan": "6.6", "status": "unaffected", "version": "0", "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": "6.18.54", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.8", "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: hci_sync: Serialize local codec list cleanup\n\nhci_dev_close_sync() clears hdev->local_codecs after releasing hdev->lock.\nCodec list additions and both traversals in sco_sock_getsockopt() use that\nlock, but the close path does not. A close and BT_CODEC query can therefore\ninterleave as follows:\n\n hci_dev_close_sync() sco_sock_getsockopt()\n hci_dev_lock()\n fetch codec entry\n hci_codec_list_clear()\n kfree(entry)\n read entry->id\n\nThe reader then accesses an entry which the close path has freed. KASAN\n\n BUG: KASAN: slab-use-after-free in sco_sock_getsockopt+0xfa0/0xfe0\n Read of size 1 at addr ffff8881001c3450\n Call Trace:\n sco_sock_getsockopt+0xfa0/0xfe0\n do_sock_getsockopt+0x537/0x7b0\n __sys_getsockopt+0xf2/0x170\n Allocated by task 92:\n hci_codec_list_add.isra.0+0x2c/0x440\n hci_read_codec_capabilities+0x224/0x590\n hci_read_supported_codecs+0x2c2/0x640\n Freed by task 92:\n kfree+0x131/0x3c0\n hci_codec_list_clear+0xd8/0x160\n hci_dev_close_sync+0x92a/0xfa0\n\nTake hdev->lock around the clear operation at its existing point in the\nclose path. This makes the clear wait for active readers and prevents a new\ntraversal until the list is empty without changing teardown ordering."}], "id": "CVE-2026-98246", "lastModified": "2026-10-19T10:18:25.497", "metrics": {}, "published": "2026-10-06T09:18:12.783", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/1276c2fafd18499769a28f96f45c5a76d6fc990e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/1ee0c5429dc4a92879bda2554b1bfd4abc6c587c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/4dc1ae5ff75b17e17ec4b74b11cc4b0099e71e00"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/560ed4373c06a58123ecdf9ad5ecaddc87a73382"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/9a10987a2f160a44a638c9a35994ca6e3089696e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/9f407d52c0d881430d689836d3e7d32aa36f98b5"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: Bluetooth: hci_sync: Serialize local codec list cleanup", "id": "2546341", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2546341"}, "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:\nBluetooth: hci_sync: Serialize local codec list cleanup\nhci_dev_close_sync() clears hdev->local_codecs after releasing hdev->lock.\nCodec list additions and both traversals in sco_sock_getsockopt() use that\nlock, but the close path does not. A close and BT_CODEC query can therefore\ninterleave as follows:\nhci_dev_close_sync() sco_sock_getsockopt()\nhci_dev_lock()\nfetch codec entry\nhci_codec_list_clear()\nkfree(entry)\nread entry->id\nThe reader then accesses an entry which the close path has freed. KASAN\nBUG: KASAN: slab-use-after-free in sco_sock_getsockopt+0xfa0/0xfe0\nRead of size 1 at addr ffff8881001c3450\nCall Trace:\nsco_sock_getsockopt+0xfa0/0xfe0\ndo_sock_getsockopt+0x537/0x7b0\n__sys_getsockopt+0xf2/0x170\nAllocated by task 92:\nhci_codec_list_add.isra.0+0x2c/0x440\nhci_read_codec_capabilities+0x224/0x590\nhci_read_supported_codecs+0x2c2/0x640\nFreed by task 92:\nkfree+0x131/0x3c0\nhci_codec_list_clear+0xd8/0x160\nhci_dev_close_sync+0x92a/0xfa0\nTake hdev->lock around the clear operation at its existing point in the\nclose path. This makes the clear wait for active readers and prevents a new\ntraversal until the list is empty without changing teardown ordering.", "A flaw was found in the Linux kernel's Bluetooth subsystem. A race condition during Bluetooth device closure allows codec list cleanup to proceed without appropriate locking while a concurrent socket option query is reading codec entries. A local user can exploit this vulnerability to trigger a use-after-free condition, leading to a Denial of Service (DoS) via a system crash or potential privilege escalation."], "name": "CVE-2026-98246", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "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": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "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": "Affected", "package_name": "openshift/ose-rhel-coreos-9", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-10-06T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-98246\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-98246\nhttps://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98246.mbox"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[626535077ba9dc110787540d1fe24881094c15a1,9f407d52c0d881430d689836d3e7d32aa36f98b5)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[b938790e70540bf4f2e653dcd74b232494d06c8f,560ed4373c06a58123ecdf9ad5ecaddc87a73382)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[b938790e70540bf4f2e653dcd74b232494d06c8f,1ee0c5429dc4a92879bda2554b1bfd4abc6c587c)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[b938790e70540bf4f2e653dcd74b232494d06c8f,4dc1ae5ff75b17e17ec4b74b11cc4b0099e71e00)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[b938790e70540bf4f2e653dcd74b232494d06c8f,1276c2fafd18499769a28f96f45c5a76d6fc990e)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[b938790e70540bf4f2e653dcd74b232494d06c8f,9a10987a2f160a44a638c9a35994ca6e3089696e)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "eea5a8f0c3b7c884d2351e75fbdd0a3d7def5ae1"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[6.1.57,6.1.189)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[6.5.7,6.6)"}}], "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": "6.6"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,6.6)"}}, {"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": "[6.18.54,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.8,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.3-rc4,*]"}}], "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": "2026-10-06T16:00:03.499426+00:00", "updated": "2026-10-11T16:30:17.387605+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-416", "CWE-825"]}