298 lines
15 KiB
JSON
298 lines
15 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-2026-80572",
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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": "2026-08-26T14:34:25.768Z",
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"datePublished": "2026-08-26T14:37:33.141Z",
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"dateUpdated": "2026-10-30T12:30:37.072Z"
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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": "2026-10-30T12:30:37.072Z"
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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\nInput: byd - synchronize timer deletion before freeing private data\n\nbyd_disconnect() uses timer_delete() before freeing the driver's private\ndata. This does not wait for a running byd_clear_touch() callback, which\ndereferences the private data and its psmouse pointer. A callback racing\nwith disconnect can therefore access the private data after it has been\nfreed. The timer can also still be re-armed by byd_process_byte() while\nthe disconnect is in progress.\n\nUse timer_shutdown_sync() before freeing the private data: it waits for\na running callback and turns any later re-arm attempt into a no-op."
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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:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 7.8,
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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:L - Reachable from local PS/2 input: BYD packets enter via serio_interrupt() from built-in touchpad hardware or userio-emulated SERIO_8042 port; byd_process_byte()/byd_disconnect() are not network-exposed.\nAC:L - An attacker can arm the 64ms byd_clear_touch timer via touch/relative packets while concurrently closing userio or unbinding the port to invoke byd_disconnect(), controlling both sides of the disconnect/timer race.\nPR:L - Exploitation needs only local access to the PS/2 touchpad or /dev/userio to inject packets and trigger teardown; no init-namespace root, CAP_SYS_ADMIN, or write access to psmouse sysfs is required.\nUI:N - The attacker supplies touchpad traffic and drives device disconnect/emulation teardown themselves; no separate victim interaction (mount, plug-in approval, or click) is needed.\nS:U - Corruption stays within the host kernel address space during PS/2 driver teardown; it is standard local privilege escalation, not a guest-to-host or sandbox boundary crossing.\nC:H - byd_clear_touch() dereferences freed byd_data (priv->psmouse) and can read attacker-reclaimed slab contents, enabling kernel pointer disclosure and broader arbitrary read primitives typical of heap use-after-free bugs.\nI:H - The timer callback writes into freed byd_data fields and may call input/report helpers through a stale psmouse pointer, giving heap corruption and a path to arbitrary kernel writes or control-flow hijacking.\nA:H - Racing the timer with disconnect can cause invalid pointer dereferences, use-after-free access, kernel oops, or panic during input teardown; the condition is repeatable by re-arming the timer."
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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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"drivers/input/mouse/byd.c"
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],
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"versions": [
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{
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"version": "2d5f5611dd0de52e9a52b56391a7049a52184e72",
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"lessThan": "fe2785d5513b3254368a1f0831515fc59ab0d40d",
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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": "2d5f5611dd0de52e9a52b56391a7049a52184e72",
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"lessThan": "b4d74810aad9b29c313b4d7880c84aceb5abe488",
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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": "2d5f5611dd0de52e9a52b56391a7049a52184e72",
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"lessThan": "84b205297fa15f97510342221d8c9a0119711478",
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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": "2d5f5611dd0de52e9a52b56391a7049a52184e72",
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"lessThan": "28d984a66b9e14be74986167b6ad40b5e0daf19a",
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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": "2d5f5611dd0de52e9a52b56391a7049a52184e72",
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"lessThan": "ee944a706a18322b4a2599eebe8040a2994e928f",
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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": "2d5f5611dd0de52e9a52b56391a7049a52184e72",
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"lessThan": "8dbfd8e32a13e116790780ed0be82b5a05eb9916",
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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": "2d5f5611dd0de52e9a52b56391a7049a52184e72",
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"lessThan": "2e509ef60ee41a2da0deb062c262bb530143fb37",
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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": "2d5f5611dd0de52e9a52b56391a7049a52184e72",
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"lessThan": "c83e79c0842ed29860648bcce5022ef0ba5001c6",
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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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"drivers/input/mouse/byd.c"
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],
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"versions": [
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{
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"version": "4.6",
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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": "4.6",
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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": "5.10.273",
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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": "5.15.224",
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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": "6.1.185",
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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": "6.6.154",
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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": "6.12.106",
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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": "6.18.46",
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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": "7.1.10",
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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": "4.6",
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"versionEndExcluding": "5.10.273"
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},
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/fe2785d5513b3254368a1f0831515fc59ab0d40d"
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},
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{
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"url": "https://git.kernel.org/stable/c/b4d74810aad9b29c313b4d7880c84aceb5abe488"
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},
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{
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"url": "https://git.kernel.org/stable/c/84b205297fa15f97510342221d8c9a0119711478"
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},
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{
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"url": "https://git.kernel.org/stable/c/28d984a66b9e14be74986167b6ad40b5e0daf19a"
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},
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{
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"url": "https://git.kernel.org/stable/c/ee944a706a18322b4a2599eebe8040a2994e928f"
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},
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{
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"url": "https://git.kernel.org/stable/c/8dbfd8e32a13e116790780ed0be82b5a05eb9916"
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},
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{
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"url": "https://git.kernel.org/stable/c/2e509ef60ee41a2da0deb062c262bb530143fb37"
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},
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{
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"url": "https://git.kernel.org/stable/c/c83e79c0842ed29860648bcce5022ef0ba5001c6"
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}
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],
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"title": "Input: byd - synchronize timer deletion before freeing private data",
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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-2026-80572",
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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": "2026-10-16T19:17:35.214904Z"
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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": "2026-10-16T19:26:27.388Z"
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}
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}
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]
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}
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} |