164 lines
8.7 KiB
JSON
164 lines
8.7 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-2026-98841",
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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": "2026-09-25T10:25:14.373Z",
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"datePublished": "2026-10-18T15:50:15.224Z",
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"dateUpdated": "2026-10-19T09:26:33.492Z"
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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": "2026-10-19T09:26:33.492Z"
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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\nvirt: vmgenid: set driver_data before registering notification handlers\n\nBoth probe paths register their notification handler before assigning\ndriver_data, which the handler dereferences.\n\nIn the devicetree path, the notification IRQ can fire as soon as\ndevm_request_irq() registers the handler: the interrupt may already be\npending at probe time, for example when a VMM injects the\ngeneration-changed notification while restoring a guest from a snapshot\nthat was taken before the driver had probed (Firecracker does exactly\nthis on snapshot restore). The IRQ is also requested with IRQF_SHARED,\nso another device sharing the line can trigger the handler just as\nearly. The handler then calls vmgenid_notify(), which dereferences the\nstill-NULL driver_data and panics:\n\n Unable to handle kernel NULL pointer dereference at virtual address 0000000000000010\n CPU: 0 UID: 0 PID: 1 Comm: swapper/0 Not tainted 6.18.38+ #1 PREEMPT(none)\n Hardware name: linux,dummy-virt (DT)\n pc : vmgenid_notify.isra.0+0x24/0x8c\n lr : vmgenid_of_irq_handler+0x14/0x34\n Call trace:\n vmgenid_notify.isra.0+0x24/0x8c (P)\n vmgenid_of_irq_handler+0x14/0x34\n __handle_irq_event_percpu+0x44/0x1bc\n handle_irq_event+0x4c/0xb4\n handle_fasteoi_irq+0xf8/0x1f8\n\nThe ACPI path has the same ordering problem: the handler is installed\nwith acpi_install_notify_handler() before driver_data is assigned.\nACPI notifications are dispatched asynchronously from a workqueue, so\nthe window is narrow, but a notification arriving between the two calls\nhits the same NULL dereference.\n\nAssign driver_data before registering the handlers. The state is fully\ninitialized at that point, so the handlers are safe to run. Should\nregistration fail, the probe error path leaves no dangling pointer\nbehind: the driver core clears driver_data in device_unbind_cleanup()."
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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/virt/vmgenid.c"
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],
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"versions": [
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{
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"version": "e07606713a908eee8099883c8c830ebe33aaf748",
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"lessThan": "538fe5efaa9704ad820ba34b4f9df135ca873d79",
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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": "e07606713a908eee8099883c8c830ebe33aaf748",
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"lessThan": "7a1e8daeaa466c6aaffa223e1afe9cfeece0dd47",
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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": "e07606713a908eee8099883c8c830ebe33aaf748",
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"lessThan": "8f42954ad8bf9bdbf574f2c437ad30cb2601f401",
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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": "e07606713a908eee8099883c8c830ebe33aaf748",
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"lessThan": "9f8139c6145cf17d690d6c414d43b4c0bef632fb",
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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/virt/vmgenid.c"
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],
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"versions": [
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{
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"version": "6.10",
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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": "6.10",
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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": "6.12.113",
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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": "6.18.56",
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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": "7.2.10",
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"lessThanOrEqual": "7.2.*",
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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": "7.3",
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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": "6.10",
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"versionEndExcluding": "6.12.113"
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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": "6.10",
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"versionEndExcluding": "6.18.56"
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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": "6.10",
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"versionEndExcluding": "7.2.10"
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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": "6.10",
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"versionEndExcluding": "7.3"
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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/538fe5efaa9704ad820ba34b4f9df135ca873d79"
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},
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{
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"url": "https://git.kernel.org/stable/c/7a1e8daeaa466c6aaffa223e1afe9cfeece0dd47"
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},
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{
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"url": "https://git.kernel.org/stable/c/8f42954ad8bf9bdbf574f2c437ad30cb2601f401"
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},
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{
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"url": "https://git.kernel.org/stable/c/9f8139c6145cf17d690d6c414d43b4c0bef632fb"
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}
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],
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"title": "virt: vmgenid: set driver_data before registering notification handlers",
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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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} |