261 lines
14 KiB
JSON
261 lines
14 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-2025-38074",
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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": "2025-04-16T04:51:23.980Z",
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"datePublished": "2025-06-18T09:33:50.006Z",
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"dateUpdated": "2026-08-05T11:59:14.881Z"
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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": "2026-08-05T11:59:14.881Z"
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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\nvhost-scsi: protect vq->log_used with vq->mutex\n\nThe vhost-scsi completion path may access vq->log_base when vq->log_used is\nalready set to false.\n\n vhost-thread QEMU-thread\n\nvhost_scsi_complete_cmd_work()\n-> vhost_add_used()\n -> vhost_add_used_n()\n if (unlikely(vq->log_used))\n QEMU disables vq->log_used\n via VHOST_SET_VRING_ADDR.\n mutex_lock(&vq->mutex);\n vq->log_used = false now!\n mutex_unlock(&vq->mutex);\n\n\t\t\t\t QEMU gfree(vq->log_base)\n log_used()\n -> log_write(vq->log_base)\n\nAssuming the VMM is QEMU. The vq->log_base is from QEMU userpace and can be\nreclaimed via gfree(). As a result, this causes invalid memory writes to\nQEMU userspace.\n\nThe control queue path has the same issue."
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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:C/C:H/I:H/A:H",
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"baseScore": 8.8,
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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 - vhost-scsi is a host-kernel backend driven by a guest VM through its virtqueues and by the VMM through /dev/vhost-scsi ioctls; there is no network-facing path, so the attacker acts from a local context (inside a guest on the host, or a local host process holding the vhost fd).\nAC:L - The attacker controls both sides of the race — a continuous stream of guest SCSI I/O keeps the unlocked completion worker running, and a guest-initiated virtio device reset forces QEMU's vhost_dev_stop() to clear log_used and free the log bitmap; the window is wide because the entire completion loop ran with no lock at all, and each command issues multiple log_write() calls.\nPR:L - The attacker needs to be an authorized guest tenant driving the virtio-scsi device (or a local host process with the vhost-scsi fd); no host root or elevated host capability is required, and ordinary unprivileged guest I/O suffices to keep the completion path armed.\nUI:N - No victim action is needed — the guest can itself force the log-teardown path via a virtio device reset or feature renegotiation while completions are in flight, and the migration-end teardown is a routine automated host operation, not a tricked user action.\nS:C - The vulnerable component is the host kernel's vhost-scsi driver, but the corrupted resource is the host VMM (QEMU) userspace address space, reached from inside a guest — the guest confinement boundary is crossed, matching the guest-to-host escape case.\nC:H - Guest-influenced bit-sets at attacker-chosen offsets from a stale log_base corrupt live QEMU heap objects (pointers, lengths, migration bitmap state), which is leverageable to disclose host memory back into the guest.\nI:H - This is an out-of-bounds/use-after-free write into the host VMM process with attacker-controlled offset and multiplicity, enabling corruption of QEMU control structures and hence control-flow hijack, and it silently corrupts the migration dirty bitmap so migrated guest state is written incorrectly.\nA:H - Corrupting glib heap metadata aborts QEMU and terminates the VM, migrations fail or complete with corrupt state, and set_bit_to_user()'s BUG_ON(r != 1) can be reached when the stale log page is no longer pinnable."
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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/vhost/scsi.c"
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],
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"versions": [
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{
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"version": "057cbf49a1f08297877e46c82f707b1bfea806a8",
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"lessThan": "80cf68489681c165ded460930e391b1eb37b5f6f",
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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": "057cbf49a1f08297877e46c82f707b1bfea806a8",
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"lessThan": "8312a1ccff1566f375191a89b9ba71b6eb48a8cd",
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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": "057cbf49a1f08297877e46c82f707b1bfea806a8",
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"lessThan": "59614c5acf6688f7af3c245d359082c0e9e53117",
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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": "057cbf49a1f08297877e46c82f707b1bfea806a8",
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"lessThan": "ca85c2d0db5f8309832be45858b960d933c2131c",
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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": "057cbf49a1f08297877e46c82f707b1bfea806a8",
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"lessThan": "bd8c9404e44adb9f6219c09b3409a61ab7ce3427",
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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": "057cbf49a1f08297877e46c82f707b1bfea806a8",
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"lessThan": "c0039e3afda29be469d29b3013d7f9bdee136834",
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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": "057cbf49a1f08297877e46c82f707b1bfea806a8",
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"lessThan": "f591cf9fce724e5075cc67488c43c6e39e8cbe27",
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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/vhost/scsi.c"
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],
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"versions": [
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{
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"version": "3.6",
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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": "3.6",
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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": "5.10.240",
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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": "5.15.189",
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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": "6.1.146",
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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": "6.6.93",
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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": "6.12.31",
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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": "6.14.9",
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"lessThanOrEqual": "6.14.*",
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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": "6.15",
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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": "3.6",
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"versionEndExcluding": "5.10.240"
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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": "3.6",
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"versionEndExcluding": "5.15.189"
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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": "3.6",
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"versionEndExcluding": "6.1.146"
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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": "3.6",
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"versionEndExcluding": "6.6.93"
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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": "3.6",
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"versionEndExcluding": "6.12.31"
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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": "3.6",
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"versionEndExcluding": "6.14.9"
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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": "3.6",
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"versionEndExcluding": "6.15"
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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/80cf68489681c165ded460930e391b1eb37b5f6f"
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},
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{
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"url": "https://git.kernel.org/stable/c/8312a1ccff1566f375191a89b9ba71b6eb48a8cd"
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},
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{
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"url": "https://git.kernel.org/stable/c/59614c5acf6688f7af3c245d359082c0e9e53117"
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},
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{
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"url": "https://git.kernel.org/stable/c/ca85c2d0db5f8309832be45858b960d933c2131c"
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},
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{
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"url": "https://git.kernel.org/stable/c/bd8c9404e44adb9f6219c09b3409a61ab7ce3427"
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},
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{
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"url": "https://git.kernel.org/stable/c/c0039e3afda29be469d29b3013d7f9bdee136834"
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},
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{
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"url": "https://git.kernel.org/stable/c/f591cf9fce724e5075cc67488c43c6e39e8cbe27"
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}
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],
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"title": "vhost-scsi: protect vq->log_used with vq->mutex",
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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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"title": "CVE Program Container",
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"references": [
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{
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"url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html"
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},
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{
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"url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html"
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}
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],
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"providerMetadata": {
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"orgId": "af854a3a-2127-422b-91ae-364da2661108",
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"shortName": "CVE",
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"dateUpdated": "2025-11-03T17:33:42.169Z"
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}
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}
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]
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}
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} |