225 lines
11 KiB
JSON
225 lines
11 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-80721",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2026-08-26T14:34:25.788Z",
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"datePublished": "2026-08-28T06:53:17.278Z",
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"dateUpdated": "2026-10-16T19:26:35.259Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-08-30T07:08:36.447Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: ISO: ensure no dangling hcon references in iso_conn\n\nAfter iso_conn_del(), ISO sockets should not dereference the hcon any\nmore. Currently, clearing iso_conn::hcon relies on iso_conn_del()\nreleasing the last reference to the iso_conn.\n\nSimplify this by explicitly clearing conn->hcon in iso_conn_del(), to\navoid more complex reasoning on races about who holds the last\nreference."
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 8.8,
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"baseSeverity": "HIGH"
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},
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"scenarios": [
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{
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"lang": "en",
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"value": "AV:A - The bug is in Bluetooth ISO connection teardown (iso_conn_del/iso_conn_free); reachable when an adjacent peer triggers HCI disconnect/connect-failure events or sends ISO traffic processed by iso_recv, without network or physical USB access.\nAC:L - An adjacent attacker controls both sides of the refcount race by timing remote disconnects and ISO packets against local teardown; no rare layout or victim-specific state beyond an active ISO session is required.\nPR:N - No local privileges are required on the victim; an unauthenticated adjacent Bluetooth peer can trigger iso_disconn_cfm/iso_connect_cfm teardown on phones and desktops with Bluetooth and LE Audio/ISO enabled.\nUI:N - Exploitation needs no victim interaction during the attack; once Bluetooth is on and an ISO link exists (e.g., LE Audio), remote disconnect and ISO traffic alone can hit the race.\nS:U - The flaw causes kernel heap use-after-free on hci_conn via dangling iso_conn::hcon references; impact stays within kernel memory safety, not a VM escape or cross-authority boundary.\nC:H - After hci_conn_del frees hcon, iso_conn still holds conn->hcon; subsequent iso_conn_free or socket paths dereference freed hci_conn memory, a classic UAF read primitive.\nI:H - Use-after-free on hci_conn enables corrupting connection management fields and hci_conn_drop state; such kernel heap UAF bugs are routinely leveraged for arbitrary write and code execution.\nA:H - Dereferencing freed hci_conn in iso_conn_free or ISO socket teardown reliably causes kernel oops or panic, giving unprivileged adjacent attackers a repeatable denial-of-service."
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}
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]
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"net/bluetooth/iso.c"
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],
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"versions": [
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{
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"version": "dc26097bdb864a0d5955b9a25e43376ffc1af99b",
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"lessThan": "e941799c31f68e67ce0976efb38a79101f921b64",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "dc26097bdb864a0d5955b9a25e43376ffc1af99b",
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"lessThan": "cdce8af9291d8a1f8916c271de029bf558d9e8ec",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "dc26097bdb864a0d5955b9a25e43376ffc1af99b",
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"lessThan": "aa9f7cb2bd3a2be998ceb739fc9a2f986eba43eb",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "f53e7489273dc2bb307bf50f319b3762d45534f0",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "a58d0f5dac322e16cc75334d000666512341bde5",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "6.11.11",
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"lessThan": "6.12",
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"status": "affected",
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"versionType": "semver"
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},
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{
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"version": "6.12.2",
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"lessThan": "6.13",
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"status": "affected",
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"versionType": "semver"
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"net/bluetooth/iso.c"
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],
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"versions": [
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{
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"version": "6.13",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "6.13",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.18.44",
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"lessThanOrEqual": "6.18.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.1.8",
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"lessThanOrEqual": "7.1.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.2",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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{
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"nodes": [
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{
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.13",
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"versionEndExcluding": "6.18.44"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.13",
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"versionEndExcluding": "7.1.8"
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.13",
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.11.11"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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}
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}
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]
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}
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/e941799c31f68e67ce0976efb38a79101f921b64"
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},
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{
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"url": "https://git.kernel.org/stable/c/cdce8af9291d8a1f8916c271de029bf558d9e8ec"
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},
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{
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"url": "https://git.kernel.org/stable/c/aa9f7cb2bd3a2be998ceb739fc9a2f986eba43eb"
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}
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],
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"title": "Bluetooth: ISO: ensure no dangling hcon references in iso_conn",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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},
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"adp": [
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{
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"metrics": [
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{
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"other": {
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"type": "ssvc",
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"content": {
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"id": "CVE-2026-80721",
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"role": "CISA Coordinator",
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"options": [
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{
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"Exploitation": "none"
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},
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{
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"Automatable": "no"
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},
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{
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"Technical Impact": "total"
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}
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],
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"version": "2.0.3",
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"timestamp": "2026-10-16T19:20:54.409613Z"
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}
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}
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}
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],
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"title": "CISA ADP Vulnrichment",
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"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"shortName": "CISA-ADP",
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"dateUpdated": "2026-10-16T19:26:35.259Z"
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}
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}
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]
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}
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} |