164 lines
8.5 KiB
JSON
164 lines
8.5 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-2026-97996",
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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": "2026-09-25T10:18:58.209Z",
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"datePublished": "2026-09-25T10:23:26.913Z",
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"dateUpdated": "2026-10-19T09:12:03.153Z"
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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": "2026-10-19T09:12:03.153Z"
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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\nvirtio: fix use-after-free in unregister_virtio_device()\n\ndevice_unregister() is device_del() plus put_device(). When the caller\nholds no extra reference, that drops the last one and runs the release\ncallback, which for several transports frees the memory the embedded\nstruct virtio_device sits in. unregister_virtio_device() then calls\nvirtio_debug_device_exit(), which reads dev->debugfs_dir out of the freed\nobject.\n\nAffected transports are the ones whose release callback frees and whose\nremove path takes no reference: virtio_mmio, virtio_vdpa, virtio_uml,\nmlxbf-tmfifo and virtio_ccw. virtio_pci is unaffected because\nvirtio_pci_remove() brackets the call with get_device() and put_device().\n\nRemove the debugfs entries before the device can go away. They are only\naccessed through the protected debugfs interface, so\ndebugfs_remove_recursive() waits for in-progress file operations before\nreturning. Tearing them down while the device is still alive is therefore\nsafe.\n\nReproduced on User-Mode Linux with CONFIG_KASAN and CONFIG_VIRTIO_DEBUG\nby unbinding a virtio-uml device:\n\n BUG: KASAN: slab-use-after-free in virtio_debug_device_exit+0x36/0x4d\n Read of size 8 at addr 00000000616e0b10 by task init/1\n __asan_report_load8_noabort\n virtio_debug_device_exit+0x36/0x4d\n unregister_virtio_device+0x48/0x75\n virtio_uml_remove\n platform_remove\n device_release_driver_internal\n unbind_store\n\n Freed by task 1:\n kfree\n virtio_uml_release_dev\n device_release\n kobject_put\n put_device\n device_unregister\n\nWith this applied, the report is gone and unbind is clean."
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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/virtio/virtio.c"
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],
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"versions": [
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{
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"version": "96a8326d69fffd7e8c2eb737dc060d8009a33b39",
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"lessThan": "951cad50cba89e736afdee4a730e0e52f9245c9b",
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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": "96a8326d69fffd7e8c2eb737dc060d8009a33b39",
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"lessThan": "77dbd10a701a30fdfea5c3bb7a29163128f9a9c7",
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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": "96a8326d69fffd7e8c2eb737dc060d8009a33b39",
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"lessThan": "caf042153016d651b55d0fb4a63cdf7d0d23dee2",
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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": "96a8326d69fffd7e8c2eb737dc060d8009a33b39",
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"lessThan": "3f9a0fceb730f5107d52421ead5568eae25a0049",
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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/virtio/virtio.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": "6.12.111",
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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": "6.18.53",
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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": "7.2.7",
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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": "6.12.111"
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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": "6.18.53"
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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": "7.2.7"
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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/951cad50cba89e736afdee4a730e0e52f9245c9b"
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},
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{
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"url": "https://git.kernel.org/stable/c/77dbd10a701a30fdfea5c3bb7a29163128f9a9c7"
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},
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{
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"url": "https://git.kernel.org/stable/c/caf042153016d651b55d0fb4a63cdf7d0d23dee2"
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},
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{
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"url": "https://git.kernel.org/stable/c/3f9a0fceb730f5107d52421ead5568eae25a0049"
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}
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],
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"title": "virtio: fix use-after-free in unregister_virtio_device()",
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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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} |