218 lines
12 KiB
JSON
218 lines
12 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-2025-37800",
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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": "2025-04-16T04:51:23.941Z",
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"datePublished": "2025-05-08T06:26:01.125Z",
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"dateUpdated": "2026-10-15T21:52:00.191Z"
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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": "2026-08-05T11:57:39.250Z"
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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\ndriver core: fix potential NULL pointer dereference in dev_uevent()\n\nIf userspace reads \"uevent\" device attribute at the same time as another\nthreads unbinds the device from its driver, change to dev->driver from a\nvalid pointer to NULL may result in crash. Fix this by using READ_ONCE()\nwhen fetching the pointer, and take bus' drivers klist lock to make sure\ndriver instance will not disappear while we access it.\n\nUse WRITE_ONCE() when setting the driver pointer to ensure there is no\ntearing."
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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:U/C:H/I:N/A:H",
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"baseScore": 7.1,
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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 vulnerable code is reached by read(2) on a sysfs file (`/sys/devices/**/uevent`) and the racing unbind via ioctl on `/dev/bus/usb/*`, both requiring a local account on the system. There is no network-facing path into `dev_uevent()`.\nAC:L - The attacker controls both sides of the race: an unprivileged thread spins reading the world-readable `uevent` attribute while another thread toggles `USBDEVFS_DISCONNECT`/`USBDEVFS_CONNECT` (or CLAIM/RELEASE_INTERFACE) on the same USB interface, driving `dev->driver` between a valid pointer and NULL at will. No condition depends on state outside the attacker's influence, and the window can be retried indefinitely at high rate.\nPR:L - `dev_attr_uevent` is DEVICE_ATTR_RW (0644), so any unprivileged local user can read it, and the usbfs disconnect/connect ioctls have no `capable()` check — only rw access to a `/dev/bus/usb` node, which udev `uaccess` rules routinely grant to the logged-in seat user. No root or capability is required.\nUI:N - The attacker performs both the sysfs read and the driver unbind from their own processes; no victim action is needed. On kiosk-style systems the routine hotplug churn that also triggers it happens without any deliberate user step.\nS:U - The fault and its consequences are confined to the kernel of the same host; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - If the driver is unregistered and its module unloaded after the pointer is loaded, `drv->name` is read from freed memory and the resulting dangling `char *` is expanded by `add_uevent_var(env, \"DRIVER=%s\", ...)` into the env buffer that `uevent_show()` copies back to the unprivileged reader — a use-after-free read that leaks arbitrary kernel memory contents to userspace. The fix's klist_drivers lock exists specifically to stop the driver structure disappearing mid-read.\nI:N - The racy path only loads `dev->driver` and formats `drv->name` into a bounded, kernel-allocated uevent buffer; it performs no attacker-influenced write to kernel memory and yields no control-flow hijack primitive.\nA:H - Reloading `dev->driver` as NULL makes `dev->driver->name` a NULL-page dereference, and the freed-module variant faults on unmapped vmalloc memory — either way an oops in the driver-core read path, repeatable at will for a reliable local denial of service."
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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/base/base.h",
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"drivers/base/bus.c",
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"drivers/base/core.c"
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],
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"versions": [
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{
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"version": "16574dccd8f62dc1b585325f8a6a0aab10047ed8",
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"lessThan": "abe56be73eb10a677d16066f65ff9d30251f5eee",
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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": "16574dccd8f62dc1b585325f8a6a0aab10047ed8",
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"lessThan": "2b344e779d9afd0fcb5ee4000e4d0fc7d8d867eb",
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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": "16574dccd8f62dc1b585325f8a6a0aab10047ed8",
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"lessThan": "3781e4b83e174364998855de777e184cf0b62c40",
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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": "16574dccd8f62dc1b585325f8a6a0aab10047ed8",
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"lessThan": "18daa52418e7e4629ed1703b64777294209d2622",
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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/base/base.h",
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"drivers/base/bus.c",
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"drivers/base/core.c"
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],
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"versions": [
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{
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"version": "2.6.22",
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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": "2.6.22",
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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": "6.6.89",
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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": "6.12.26",
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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": "6.14.5",
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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": "2.6.22",
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"versionEndExcluding": "6.6.89"
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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": "2.6.22",
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"versionEndExcluding": "6.12.26"
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},
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "2.6.22",
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"versionEndExcluding": "6.14.5"
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{
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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/abe56be73eb10a677d16066f65ff9d30251f5eee"
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},
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{
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"url": "https://git.kernel.org/stable/c/2b344e779d9afd0fcb5ee4000e4d0fc7d8d867eb"
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},
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{
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"url": "https://git.kernel.org/stable/c/3781e4b83e174364998855de777e184cf0b62c40"
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},
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{
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"url": "https://git.kernel.org/stable/c/18daa52418e7e4629ed1703b64777294209d2622"
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}
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],
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"title": "driver core: fix potential NULL pointer dereference in dev_uevent()",
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"x_generator": {
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"engine": "bippy-1.2.0"
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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-2025-37800",
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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": "partial"
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}
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],
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"version": "2.0.3",
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"timestamp": "2026-10-15T21:45:16.837997Z"
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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": "2026-10-15T21:52:00.191Z"
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}
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}
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} |