298 lines
16 KiB
JSON
298 lines
16 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-2026-72115",
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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": "2026-08-09T03:40:39.906Z",
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"datePublished": "2026-08-15T05:52:55.524Z",
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"dateUpdated": "2026-10-16T18:44:56.703Z"
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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": "2026-08-19T16:36:03.316Z"
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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\ncan: bcm: track a single source interface for ANYDEV timeout/throttle ops\n\nAn ANYDEV rx op (ifindex == 0) with an active RX timeout and/or\nthrottle timer has no defined semantics when matching frames arrive\nfrom several interfaces: bcm_rx_handler() can run concurrently for\nthe same op on different CPUs, racing hrtimer_cancel()/\nbcm_rx_starttimer() against bcm_rx_timeout_handler() and causing\nspurious RX_TIMEOUT notifications and last_frames corruption. The\nsame concurrency lets throttled multiplex frames from different\ninterfaces clobber the single rx_ifindex/rx_stamp fields shared by\nthe op.\n\nAdd op->if_detected to track the first interface that delivers a\nmatching frame while a timeout/throttle timer is configured, and\nreject frames from any other interface for that op. The claim is\ndecided in bcm_rx_handler() before hrtimer_cancel() touches\nop->timer, so a rejected frame can never disturb the claimed\ninterface's watchdog. RTR-mode ops are excluded via RX_RTR_FRAME,\nindependent of kt_ival1/kt_ival2, since those may briefly hold a\nstale value from an earlier non-RTR configuration.\n\nThe claim is released in bcm_notify() on NETDEV_UNREGISTER and in\nbcm_rx_setup() when SETTIMER reconfigures the timer values.\n\nA (re-)claim is only possible on CAN devices in NETREG_REGISTERED\ndev->reg_state to cover the release in bcm_notify() where reg_state\nbecomes NETREG_UNREGISTERING until synchronize_net()."
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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:N",
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"baseScore": 8.1,
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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 - bcm_rx_handler() is reached from the CAN driver RX path when matching frames arrive on multiple interfaces; on automotive/industrial systems an attacker on shared CAN segment(s) can inject concurrent frames without host shell access once an ANYDEV BCM RX op with active timeout/throttle timers exists.\nAC:L - The attacker controls both sides of the race by flooding matching frames on multiple CAN interfaces (or paired vcan devices) to run bcm_rx_handler() concurrently on different CPUs, racing hrtimer_cancel/bcm_rx_starttimer against bcm_rx_timeout_handler and interleaved last_frames writers.\nPR:N - No Linux capability or account is required to deliver triggering CAN traffic on multiple interfaces; bcm_rx_handler() runs from the unauthenticated netdev RX path once any ANYDEV BCM RX op with active kt_ival1/kt_ival2 timers exists, as commonly configured by telematics/diagnostic daemons.\nUI:N - Exploitation requires no victim interaction beyond normal system operation; malicious or concurrent CAN frames are processed automatically in softirq without mounts, file opens, or user prompts.\nS:U - Impact is confined to corrupted BCM state and incorrect CAN notifications delivered to the subscribing userspace process within the same kernel/host security boundary; no VM, container, or IOMMU escape is involved.\nC:H - Concurrent bcm_rx_handler() and bcm_rx_timeout_handler() races corrupt op->last_frames heap buffers via unsynchronized memcpy/memset, mixing attacker-controlled CAN payloads from different interfaces and leaking cross-bus frame content through bcm_send_to_user().\nI:H - last_frames corruption lets attacker-controlled frames from one interface overwrite or interleave with another's stored/throttled state, misattributing RX_CHANGED/RX_TIMEOUT notifications and corrupting safety- or security-relevant CAN monitoring and control decisions.\nA:N - The race corrupts per-op BCM buffers and emits spurious RX_TIMEOUT events but does not dereference freed objects, overrun buffer bounds, or fault the kernel; no oops, panic, hang, or sustained kernel denial of service is indicated."
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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/can/bcm.c"
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],
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"versions": [
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{
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"version": "ffd980f976e7fd666c2e61bf8ab35107efd11828",
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"lessThan": "f147f48837cb1426521f5b3c3b3134c71128a25d",
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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": "ffd980f976e7fd666c2e61bf8ab35107efd11828",
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"lessThan": "57cf104da4cf450ae9c16801a3164604b801d2cc",
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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": "ffd980f976e7fd666c2e61bf8ab35107efd11828",
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"lessThan": "03dfe347c398fa41a7e30e8dc538f12568c183e6",
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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": "ffd980f976e7fd666c2e61bf8ab35107efd11828",
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"lessThan": "18b45251e74e35668f0dd0c470549384ae191ecf",
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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": "ffd980f976e7fd666c2e61bf8ab35107efd11828",
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"lessThan": "3ff8c24b421070a2db99a5cdb86edc9ff339418e",
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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": "ffd980f976e7fd666c2e61bf8ab35107efd11828",
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"lessThan": "eca8b44d51fc6ab61022258ec968e55e3073b79e",
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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": "ffd980f976e7fd666c2e61bf8ab35107efd11828",
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"lessThan": "b6317022b685a430a3ae420456716e3c0c02ef4b",
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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": "ffd980f976e7fd666c2e61bf8ab35107efd11828",
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"lessThan": "2f5976f54a04e9f18b25283036ac3136be453b17",
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"status": "affected",
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"versionType": "git"
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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/can/bcm.c"
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],
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"versions": [
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{
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"version": "2.6.25",
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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": "2.6.25",
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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": "5.10.265",
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"lessThanOrEqual": "5.10.*",
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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": "5.15.216",
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"lessThanOrEqual": "5.15.*",
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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": "6.1.183",
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"lessThanOrEqual": "6.1.*",
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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": "6.6.148",
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"lessThanOrEqual": "6.6.*",
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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": "6.12.101",
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"lessThanOrEqual": "6.12.*",
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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": "6.18.42",
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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": "7.1.5",
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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": "2.6.25",
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"versionEndExcluding": "5.10.265"
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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/f147f48837cb1426521f5b3c3b3134c71128a25d"
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},
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{
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"url": "https://git.kernel.org/stable/c/57cf104da4cf450ae9c16801a3164604b801d2cc"
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},
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{
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"url": "https://git.kernel.org/stable/c/03dfe347c398fa41a7e30e8dc538f12568c183e6"
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},
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{
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"url": "https://git.kernel.org/stable/c/18b45251e74e35668f0dd0c470549384ae191ecf"
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},
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{
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"url": "https://git.kernel.org/stable/c/3ff8c24b421070a2db99a5cdb86edc9ff339418e"
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},
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{
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"url": "https://git.kernel.org/stable/c/eca8b44d51fc6ab61022258ec968e55e3073b79e"
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},
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{
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"url": "https://git.kernel.org/stable/c/b6317022b685a430a3ae420456716e3c0c02ef4b"
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},
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{
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"url": "https://git.kernel.org/stable/c/2f5976f54a04e9f18b25283036ac3136be453b17"
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}
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],
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"title": "can: bcm: track a single source interface for ANYDEV timeout/throttle ops",
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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-2026-72115",
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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": "2026-10-16T18:41:50.278770Z"
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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": "2026-10-16T18:44:56.703Z"
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}
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}
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]
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}
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} |