277 lines
15 KiB
JSON
277 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-2026-80678",
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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": "2026-08-26T14:34:25.783Z",
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"datePublished": "2026-08-28T06:52:47.077Z",
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"dateUpdated": "2026-10-16T19:26:32.757Z"
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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": "2026-08-29T06:22:05.188Z"
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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\ni2c: imx: Fix slave registration race and error handling\n\nIn i2c_imx_reg_slave(), the slave pointer was assigned before\npm_runtime_resume_and_get(). If pm_runtime_resume_and_get() failed,\nthe error path returned without clearing i2c_imx->slave, leaving it\nnon-NULL and causing all subsequent registration attempts to fail\nwith -EBUSY.\n\nAdditionally, because this driver uses a shared IRQ, the interrupt\nhandler i2c_imx_isr() can execute concurrently and, after acquiring\nslave_lock, dereference i2c_imx->slave. The previous fix attempt\nadded a lockless i2c_imx->slave = NULL on the error path, but that\ncould race with the ISR under the lock and still cause a NULL pointer\ndereference.\n\nFix both issues by deferring the assignment of i2c_imx->slave and\ni2c_imx->last_slave_event to after a successful resume, and by\nperforming the assignment inside the slave_lock critical section.\nThis guarantees that the slave pointer is never left stale on the\nerror path and is always valid when observed by the interrupt handler."
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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:N/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 8.4,
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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 - The bug is in i2c_imx_reg_slave() reached from kernel i2c_slave_register() during driver probe/module bind on embedded i.MX platforms; concurrent exploitation requires local I2C bus activity on the same adapter to fire the shared IRQ handler during registration.\nAC:L - The attacker controls the race by driving I2C slave traffic to trigger i2c_imx_isr() while registration runs, and can retry across reboots, OTA reprobes, or pm_runtime resume cycles until the unprotected slave-pointer window is hit.\nPR:N - No Linux credentials are needed when a physically proximate attacker races automated boot-time or service-driven i2c_slave_register() calls (DT probe, IPMI SSIF/MCTP backends) on imx I2C slave-capable controllers.\nUI:N - Exploitation requires no victim interaction; automated driver probe, suspend/resume, or maintenance-triggered slave registration provides the registration side of the race without user action.\nS:U - Impact is confined to kernel memory safety violations and crash on the same host; this is not a VM escape, IOMMU bypass, or other cross-security-authority boundary.\nC:H - The ISR can dereference a NULL or stale i2c_imx->slave under slave_lock when the error path races registration, violating memory safety and enabling arbitrary kernel read primitives per CVSS race/UAF guidance.\nI:H - Concurrent ISR handling during partial slave registration can corrupt driver state and invoke slave callbacks with inconsistent pointers, enabling heap manipulation and arbitrary kernel write or control-flow hijack beyond a simple crash.\nA:H - NULL or stale slave dereference in i2c_imx_isr()/i2c_imx_slave_event() causes kernel oops/panic; leaving slave non-NULL after failed pm_runtime_resume_and_get() also blocks all subsequent slave registration (-EBUSY) on affected controllers."
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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/i2c/busses/i2c-imx.c"
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],
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"versions": [
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{
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"version": "f7414cd6923fd7f78e57086fc964ba2dc25db5c1",
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"lessThan": "754bc62f72fd64b202462367134ac8ce95b005de",
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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": "f7414cd6923fd7f78e57086fc964ba2dc25db5c1",
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"lessThan": "cfdf6e13518589f911b7eace6ccb788e4ed87397",
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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": "f7414cd6923fd7f78e57086fc964ba2dc25db5c1",
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"lessThan": "b9f6f4883b9ac86654e75899d0dbf8a7a96ad5d8",
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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": "f7414cd6923fd7f78e57086fc964ba2dc25db5c1",
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"lessThan": "d6748f6802f3eebafaa16a5e5dcfbfb9b3bc173f",
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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": "f7414cd6923fd7f78e57086fc964ba2dc25db5c1",
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"lessThan": "12a4f0950a158d98552cbaeacc35edccd8d975fa",
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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": "f7414cd6923fd7f78e57086fc964ba2dc25db5c1",
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"lessThan": "614ca6594e301ff682999797c2216e9685558a2b",
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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": "f7414cd6923fd7f78e57086fc964ba2dc25db5c1",
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"lessThan": "d64ec362c369bbc33833f7936d5f3a706b0d5c45",
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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/i2c/busses/i2c-imx.c"
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],
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"versions": [
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{
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"version": "5.11",
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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": "5.11",
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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": "5.15.217",
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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": "6.6.151",
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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": "6.12.103",
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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": "6.18.44",
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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": "5.11",
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"versionEndExcluding": "5.15.217"
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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": "5.11",
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"versionEndExcluding": "6.1.183"
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},
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{
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.11",
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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/754bc62f72fd64b202462367134ac8ce95b005de"
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},
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{
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"url": "https://git.kernel.org/stable/c/cfdf6e13518589f911b7eace6ccb788e4ed87397"
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},
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{
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"url": "https://git.kernel.org/stable/c/b9f6f4883b9ac86654e75899d0dbf8a7a96ad5d8"
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},
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{
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"url": "https://git.kernel.org/stable/c/d6748f6802f3eebafaa16a5e5dcfbfb9b3bc173f"
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},
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{
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"url": "https://git.kernel.org/stable/c/12a4f0950a158d98552cbaeacc35edccd8d975fa"
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},
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{
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"url": "https://git.kernel.org/stable/c/614ca6594e301ff682999797c2216e9685558a2b"
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},
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{
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"url": "https://git.kernel.org/stable/c/d64ec362c369bbc33833f7936d5f3a706b0d5c45"
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}
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],
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"title": "i2c: imx: Fix slave registration race and error handling",
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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-2026-80678",
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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": "2026-10-16T19:19:46.218826Z"
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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": "2026-10-16T19:26:32.757Z"
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}
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}
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]
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}
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} |