248 lines
13 KiB
JSON
248 lines
13 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-2026-74468",
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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": "2026-08-15T05:44:03.902Z",
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"datePublished": "2026-08-15T12:27:06.250Z",
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"dateUpdated": "2026-08-19T16:37:12.926Z"
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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": "2026-08-19T16:37:12.926Z"
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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\ngpio: pch: use raw_spinlock_t for the register lock\n\npch_irq_type() is registered as the irq_chip .irq_set_type callback and\ntakes chip->spinlock with spin_lock_irqsave(). This callback is reached\nfrom __setup_irq() -> __irq_set_trigger() -> chip->irq_set_type() while\nthe caller holds desc->lock, a raw_spinlock_t, with hardirqs disabled.\nThat context is not sleepable, but on PREEMPT_RT a regular spinlock_t is\nan rtmutex-backed sleeping lock, so acquiring it there is invalid.\n\nThis was confirmed on a PREEMPT_RT kernel with lockdep\n(PROVE_RAW_LOCK_NESTING and DEBUG_ATOMIC_SLEEP). A grounded PoC mirrored\npch_irq_type()'s locking and drove it through the real genirq carrier\nirq_set_irq_type() -> __irq_set_trigger() -> chip->irq_set_type(), i.e.\nthe same __irq_set_trigger() edge that __setup_irq() takes for a\nrequested IRQ. With the original spin_lock_irqsave() edge lockdep\nreported an invalid wait context, immediately followed by:\n\n BUG: sleeping function called from invalid context at kernel/locking/spinlock_rt.c:48\n in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 95, name: insmod\n hardirqs last disabled at (3784): _raw_spin_lock_irqsave+0x4f/0x60\n rt_spin_lock+0x3a/0x1c0\n repro_irq_set_type+0x64/0xa0 [pch_repro]\n __irq_set_trigger+0x69/0x140\n irq_set_irq_type+0x78/0xd0\n\nSwitching the mirrored lock to raw_spinlock_t made both splats go away.\n\nConvert the register lock to raw_spinlock_t. The same lock also\nserializes the GPIO direction/value callbacks and the suspend/resume\nregister save/restore, but all of those critical sections only perform\nMMIO register accesses (ioread32()/iowrite32()) and\nirq_set_handler_locked(); none of them contain sleepable operations.\nKeeping this register lock non-sleeping is therefore appropriate for the\nirqchip callbacks and does not change the GPIO-side locking contract.\n\nThis is the same class of issue and fix as recently addressed for other\nGPIO controllers, e.g. commit 286533cb14a3 (\"gpio: sch: use raw_spinlock_t\nin the irq startup path\") and commit 90f0109019e6 (\"gpio: eic-sprd: use\nraw_spinlock_t in the irq startup path\")."
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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/gpio/gpio-pch.c"
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],
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"versions": [
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{
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"version": "38eb18a6f92da886fc1af509d25e8f7a49e23d9a",
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"lessThan": "efc76a3f5353dd33a2e2ad48200cd4a18de30a0d",
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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": "38eb18a6f92da886fc1af509d25e8f7a49e23d9a",
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"lessThan": "935e6872db7faecfbe1a10b3f5d97a62fdff5ec9",
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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": "38eb18a6f92da886fc1af509d25e8f7a49e23d9a",
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"lessThan": "98f292cb6d01487d17988d9fd4e19c13e7adb156",
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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": "38eb18a6f92da886fc1af509d25e8f7a49e23d9a",
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"lessThan": "16da33cb36e663b6967112185e11d00ce8ff957c",
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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": "38eb18a6f92da886fc1af509d25e8f7a49e23d9a",
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"lessThan": "ff050589a21967883bb55f6dba42568f8367ad4a",
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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": "38eb18a6f92da886fc1af509d25e8f7a49e23d9a",
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"lessThan": "466ab0c41d5f54f71cee60619d07c4abd0ffd2cd",
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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": "38eb18a6f92da886fc1af509d25e8f7a49e23d9a",
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"lessThan": "c0a4ec89fc26e4b679b04f1002c503cb2529acdc",
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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": "38eb18a6f92da886fc1af509d25e8f7a49e23d9a",
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"lessThan": "a02b8950d619123da64f69b70fe1dadef217dfe4",
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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/gpio/gpio-pch.c"
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],
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"versions": [
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{
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"version": "3.2",
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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": "3.2",
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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": "6.6.151",
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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": "3.2",
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"versionEndExcluding": "5.10.265"
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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": "3.2",
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"versionEndExcluding": "5.15.216"
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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": "3.2",
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"versionEndExcluding": "6.1.183"
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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": "3.2",
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"versionEndExcluding": "6.6.151"
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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": "3.2",
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"versionEndExcluding": "6.12.103"
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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": "3.2",
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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": "3.2",
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"versionEndExcluding": "7.1.8"
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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": "3.2",
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"versionEndExcluding": "7.2"
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}
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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/efc76a3f5353dd33a2e2ad48200cd4a18de30a0d"
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},
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{
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"url": "https://git.kernel.org/stable/c/935e6872db7faecfbe1a10b3f5d97a62fdff5ec9"
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},
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{
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"url": "https://git.kernel.org/stable/c/98f292cb6d01487d17988d9fd4e19c13e7adb156"
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},
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{
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"url": "https://git.kernel.org/stable/c/16da33cb36e663b6967112185e11d00ce8ff957c"
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},
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{
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"url": "https://git.kernel.org/stable/c/ff050589a21967883bb55f6dba42568f8367ad4a"
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},
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{
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"url": "https://git.kernel.org/stable/c/466ab0c41d5f54f71cee60619d07c4abd0ffd2cd"
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},
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{
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"url": "https://git.kernel.org/stable/c/c0a4ec89fc26e4b679b04f1002c503cb2529acdc"
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},
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{
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"url": "https://git.kernel.org/stable/c/a02b8950d619123da64f69b70fe1dadef217dfe4"
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}
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],
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"title": "gpio: pch: use raw_spinlock_t for the register lock",
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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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}
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} |