CVE-2026-99013

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-99013", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-25T10:25:14.385Z", "datePublished": "2026-10-23T12:20:38.612Z", "dateUpdated": "2026-10-24T14:10:01.562Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-24T14:10:01.562Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: ISO: Reject concurrent BIS listener setup\n\niso_sock_listen() drops the socket lock before calling iso_listen_bis()\nto preserve the hdev->lock ordering. Two concurrent listen() calls on\nthe same broadcast socket can therefore both observe BT_BOUND. Caller\nA can attach connA and release the locks, then caller B can acquire\nthem and attach connB before A publishes BT_LISTEN.\n\n__iso_chan_add() checks whether connB already has a socket, but not\nwhether the socket already has a connection. The second attachment\noverwrites iso_pi(sk)->conn, leaking the connA reference and leaving\nconnA->sk intact. Socket teardown follows connB, so later events on\nconnA can cause a stale socket access.\n\nRecheck BT_BOUND and require iso_pi(sk)->conn to be NULL after taking\nboth the HCI device and socket locks in iso_listen_bis(). The connection\ncheck also covers the interval between attachment and publication of\nBT_LISTEN. Reject a competing setup with -EBADFD through the existing\nunlock path before allocating another connection.\n\nA recorded KASAN report from an instrumented kernel shows:\n\n BUG: KASAN: slab-use-after-free in iso_sock_hold+0x119/0x1f0\n Call Trace:\n iso_sock_hold+0x119/0x1f0\n iso_conn_del+0xe4/0x270\n hci_disconn_complete_evt+0x351/0x8c0\n hci_event_packet+0x71b/0xb20\n hci_rx_work+0x293/0x730\n\n Allocated by task 93:\n sk_prot_alloc+0x113/0x220\n sk_alloc+0x2b/0x6d0\n bt_sock_alloc+0x29/0x370\n iso_sock_alloc.constprop.0+0x19/0x300\n iso_sock_create+0x94/0x100\n\n Freed by task 93:\n kfree+0x121/0x3c0\n __sk_destruct+0x42b/0x540\n iso_sock_release+0x29d/0x340\n __sock_release+0xa1/0x260\n sock_close+0x10/0x20"}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:L - The bad state is created by one process issuing two concurrent listen() syscalls on the same bound BTPROTO_ISO socket; __sys_listen_socket() reaches iso_sock_listen() and the patched iso_listen_bis(). An HCI disconnect only consumes the stranded connA->sk, so an adjacent peer cannot create the race alone.\nAC:L - Attacker threads control both listen() calls and can make each observe BT_BOUND before either publishes BT_LISTEN, causing hci_pa_create_sync() to create separate candidates. The attacker can close the socket and end its own broadcast/sync to drive teardown, without victim-controlled timing.\nPR:L - bt_sock_create(), iso_sock_create(), iso_sock_bind(), and iso_sock_listen() contain no capable() or ns_capable() check, so an ordinary process in init_net can create and race the socket. A separate network namespace is rejected, but no user namespace or capability is needed.\nUI:N - The attacker creates and binds the ISO socket, launches both listen() calls, and closes it; the later HCI callback is asynchronous kernel/controller work. No victim action is required.\nS:U - iso_conn_del() corrupts memory within the same host kernel that implements the attacker's ISO socket; the path crosses no VM, IOMMU, or other security authority boundary.\nC:H - After iso_pi(sk)->conn is overwritten, connA retains connA->sk and iso_sock_hold() can refcount a freed or reclaimed kmalloc-2k struct iso_pinfo. Exploiting the ensuing callback-capable socket operations permits control-flow hijack and arbitrary kernel-memory disclosure.\nI:H - iso_conn_del() passes the stale sk to iso_chan_del(), which writes sk_state and sk_err and invokes sk_state_change or parent->sk_data_ready. Reclaiming the freed object can turn these operations into arbitrary writes or control-flow hijacking.\nA:H - KASAN observed the slab use-after-free in iso_sock_hold() from hci_disconn_complete_evt() after iso_sock_release() freed the socket. Invalid refcount, locking, and callback accesses can cause a kernel oops or panic."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/bluetooth/iso.c"], "versions": [{"version": "c541d7b5e17987ed330798b07d4ad508859c1c93", "lessThan": "559e4d2b6f83aaa96061659cc7104b7a0293f9ef", "status": "affected", "versionType": "git"}, {"version": "168e28305b871d8ec604a8f51f35467b8d7ba05b", "lessThan": "90b744066ca520d1a6a505a11ade9c9a5f48accf", "status": "affected", "versionType": "git"}, {"version": "168e28305b871d8ec604a8f51f35467b8d7ba05b", "lessThan": "79993e9919a87068183ba3622c383f05c049c4bc", "status": "affected", "versionType": "git"}, {"version": "168e28305b871d8ec604a8f51f35467b8d7ba05b", "lessThan": "555ff78fa719f50ff4cdbdb40aa1acc6e8e327d3", "status": "affected", "versionType": "git"}, {"version": "6.12.6", "lessThan": "6.12.113", "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/iso.c"], "versions": [{"version": "6.13", "status": "affected"}, {"version": "0", "lessThan": "6.13", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.113", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.57", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.11", "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": "6.12.6", "versionEndExcluding": "6.12.113"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.13", "versionEndExcluding": "6.18.57"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.13", "versionEndExcluding": "7.2.11"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.13", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/559e4d2b6f83aaa96061659cc7104b7a0293f9ef"}, {"url": "https://git.kernel.org/stable/c/90b744066ca520d1a6a505a11ade9c9a5f48accf"}, {"url": "https://git.kernel.org/stable/c/79993e9919a87068183ba3622c383f05c049c4bc"}, {"url": "https://git.kernel.org/stable/c/555ff78fa719f50ff4cdbdb40aa1acc6e8e327d3"}], "title": "Bluetooth: ISO: Reject concurrent BIS listener setup", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["net/bluetooth/iso.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "559e4d2b6f83aaa96061659cc7104b7a0293f9ef", "status": "affected", "version": "c541d7b5e17987ed330798b07d4ad508859c1c93", "versionType": "git"}, {"lessThan": "90b744066ca520d1a6a505a11ade9c9a5f48accf", "status": "affected", "version": "168e28305b871d8ec604a8f51f35467b8d7ba05b", "versionType": "git"}, {"lessThan": "79993e9919a87068183ba3622c383f05c049c4bc", "status": "affected", "version": "168e28305b871d8ec604a8f51f35467b8d7ba05b", "versionType": "git"}, {"lessThan": "555ff78fa719f50ff4cdbdb40aa1acc6e8e327d3", "status": "affected", "version": "168e28305b871d8ec604a8f51f35467b8d7ba05b", "versionType": "git"}, {"lessThan": "6.12.113", "status": "affected", "version": "6.12.6", "versionType": "semver"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["net/bluetooth/iso.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.13"}, {"lessThan": "6.13", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.113", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.57", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.11", "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: ISO: Reject concurrent BIS listener setup\n\niso_sock_listen() drops the socket lock before calling iso_listen_bis()\nto preserve the hdev->lock ordering. Two concurrent listen() calls on\nthe same broadcast socket can therefore both observe BT_BOUND. Caller\nA can attach connA and release the locks, then caller B can acquire\nthem and attach connB before A publishes BT_LISTEN.\n\n__iso_chan_add() checks whether connB already has a socket, but not\nwhether the socket already has a connection. The second attachment\noverwrites iso_pi(sk)->conn, leaking the connA reference and leaving\nconnA->sk intact. Socket teardown follows connB, so later events on\nconnA can cause a stale socket access.\n\nRecheck BT_BOUND and require iso_pi(sk)->conn to be NULL after taking\nboth the HCI device and socket locks in iso_listen_bis(). The connection\ncheck also covers the interval between attachment and publication of\nBT_LISTEN. Reject a competing setup with -EBADFD through the existing\nunlock path before allocating another connection.\n\nA recorded KASAN report from an instrumented kernel shows:\n\n BUG: KASAN: slab-use-after-free in iso_sock_hold+0x119/0x1f0\n Call Trace:\n iso_sock_hold+0x119/0x1f0\n iso_conn_del+0xe4/0x270\n hci_disconn_complete_evt+0x351/0x8c0\n hci_event_packet+0x71b/0xb20\n hci_rx_work+0x293/0x730\n\n Allocated by task 93:\n sk_prot_alloc+0x113/0x220\n sk_alloc+0x2b/0x6d0\n bt_sock_alloc+0x29/0x370\n iso_sock_alloc.constprop.0+0x19/0x300\n iso_sock_create+0x94/0x100\n\n Freed by task 93:\n kfree+0x121/0x3c0\n __sk_destruct+0x42b/0x540\n iso_sock_release+0x29d/0x340\n __sock_release+0xa1/0x260\n sock_close+0x10/0x20"}], "id": "CVE-2026-99013", "lastModified": "2026-10-24T14:16:52.360", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-10-23T13:17:24.013", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/555ff78fa719f50ff4cdbdb40aa1acc6e8e327d3"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/559e4d2b6f83aaa96061659cc7104b7a0293f9ef"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/79993e9919a87068183ba3622c383f05c049c4bc"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/90b744066ca520d1a6a505a11ade9c9a5f48accf"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: Bluetooth: ISO: Reject concurrent BIS listener setup", "id": "2559812", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2559812"}, "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-825", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nBluetooth: ISO: Reject concurrent BIS listener setup\niso_sock_listen() drops the socket lock before calling iso_listen_bis()\nto preserve the hdev->lock ordering. Two concurrent listen() calls on\nthe same broadcast socket can therefore both observe BT_BOUND. Caller\nA can attach connA and release the locks, then caller B can acquire\nthem and attach connB before A publishes BT_LISTEN.\n__iso_chan_add() checks whether connB already has a socket, but not\nwhether the socket already has a connection. The second attachment\noverwrites iso_pi(sk)->conn, leaking the connA reference and leaving\nconnA->sk intact. Socket teardown follows connB, so later events on\nconnA can cause a stale socket access.\nRecheck BT_BOUND and require iso_pi(sk)->conn to be NULL after taking\nboth the HCI device and socket locks in iso_listen_bis(). The connection\ncheck also covers the interval between attachment and publication of\nBT_LISTEN. Reject a competing setup with -EBADFD through the existing\nunlock path before allocating another connection.\nA recorded KASAN report from an instrumented kernel shows:\nBUG: KASAN: slab-use-after-free in iso_sock_hold+0x119/0x1f0\nCall Trace:\niso_sock_hold+0x119/0x1f0\niso_conn_del+0xe4/0x270\nhci_disconn_complete_evt+0x351/0x8c0\nhci_event_packet+0x71b/0xb20\nhci_rx_work+0x293/0x730\nAllocated by task 93:\nsk_prot_alloc+0x113/0x220\nsk_alloc+0x2b/0x6d0\nbt_sock_alloc+0x29/0x370\niso_sock_alloc.constprop.0+0x19/0x300\niso_sock_create+0x94/0x100\nFreed by task 93:\nkfree+0x121/0x3c0\n__sk_destruct+0x42b/0x540\niso_sock_release+0x29d/0x340\n__sock_release+0xa1/0x260\nsock_close+0x10/0x20", "A flaw was found in the Linux kernel's Bluetooth subsystem. A local user could cause a Denial of Service (DoS) due to a race condition during concurrent setup of Broadcast Isochronous Stream (BIS) socket listeners. By issuing simultaneous listen calls on the same broadcast socket, an attacker can trigger a use-after-free memory error, leading to a system crash."], "name": "CVE-2026-99013", "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": "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": "2026-10-23T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-99013\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-99013\nhttps://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-99013.mbox"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[c541d7b5e17987ed330798b07d4ad508859c1c93,559e4d2b6f83aaa96061659cc7104b7a0293f9ef)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[168e28305b871d8ec604a8f51f35467b8d7ba05b,90b744066ca520d1a6a505a11ade9c9a5f48accf)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[168e28305b871d8ec604a8f51f35467b8d7ba05b,79993e9919a87068183ba3622c383f05c049c4bc)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[168e28305b871d8ec604a8f51f35467b8d7ba05b,555ff78fa719f50ff4cdbdb40a1acc6e8e327d3)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[6.12.6,6.12.113)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "6.13"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,6.13)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.12.113,6.12.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.18.57,6.18.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2.11,7.2.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,*]"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[c541d7b5e17987ed330798b07d4ad508859c1c93,559e4d2b6f83aaa96061659cc7104b7a0293f9ef)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[168e28305b871d8ec604a8f51f35467b8d7ba05b,90b744066ca520d1a6a505a11ade9c9a5f48accf)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[168e28305b871d8ec604a8f51f35467b8d7ba05b,79993e9919a87068183ba3622c383f05c049c4bc)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[168e28305b871d8ec604a8f51f35467b8d7ba05b,555ff78fa719f50ff4cdbdb40a1acc6e8e327d3)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[6.12.6,6.12.113)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"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": "6.13"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,6.13)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.12.113,6.12.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.18.57,6.18.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2.11,7.2.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,*]"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-10-23T15:30:14.847037+00:00", "updated": "2026-10-29T19:15:08.630462+00:00", "vendors": ["linux", "linux$PRODUCT$linux", "linux$PRODUCT$linux_kernel"]}