CVE-2025-37800 (GCVE-0-2025-37800)
Vulnerability from cvelistv5 – Published: 2025-05-08 06:26 – Updated: 2026-08-05 11:57
VLAI
EPSS
VEX
Title
driver core: fix potential NULL pointer dereference in dev_uevent()
Summary
In the Linux kernel, the following vulnerability has been resolved:
driver core: fix potential NULL pointer dereference in dev_uevent()
If userspace reads "uevent" device attribute at the same time as another
threads unbinds the device from its driver, change to dev->driver from a
valid pointer to NULL may result in crash. Fix this by using READ_ONCE()
when fetching the pointer, and take bus' drivers klist lock to make sure
driver instance will not disappear while we access it.
Use WRITE_ONCE() when setting the driver pointer to ensure there is no
tearing.
Severity
7.1 (High)
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
16574dccd8f62dc1b585325f8a6a0aab10047ed8 , < abe56be73eb10a677d16066f65ff9d30251f5eee
(git)
Affected: 16574dccd8f62dc1b585325f8a6a0aab10047ed8 , < 2b344e779d9afd0fcb5ee4000e4d0fc7d8d867eb (git) Affected: 16574dccd8f62dc1b585325f8a6a0aab10047ed8 , < 3781e4b83e174364998855de777e184cf0b62c40 (git) Affected: 16574dccd8f62dc1b585325f8a6a0aab10047ed8 , < 18daa52418e7e4629ed1703b64777294209d2622 (git) |
guessed | |
| Linux | Linux |
Affected:
2.6.22
Unaffected: 0 , < 2.6.22 (semver) Unaffected: 6.6.89 , ≤ 6.6.* (semver) Unaffected: 6.12.26 , ≤ 6.12.* (semver) Unaffected: 6.14.5 , ≤ 6.14.* (semver) Unaffected: 6.15 , ≤ * (original_commit_for_fix) |
guessed |
{
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}
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"descriptions": [
{
"lang": "en",
"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-\u003edriver from a\nvalid pointer to NULL may result in crash. Fix this by using READ_ONCE()\nwhen fetching the pointer, and take bus\u0027 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."
}
],
"metrics": [
{
"cvssV3_1": {
"baseScore": 7.1,
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
"version": "3.1"
},
"scenarios": [
{
"lang": "en",
"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-\u003edriver` between a valid pointer and NULL at will. No condition depends on state outside the attacker\u0027s 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 \u2014 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-\u003ename` 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 \u2014 a use-after-free read that leaks arbitrary kernel memory contents to userspace. The fix\u0027s klist_drivers lock exists specifically to stop the driver structure disappearing mid-read.\nI:N - The racy path only loads `dev-\u003edriver` and formats `drv-\u003ename` 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-\u003edriver` as NULL makes `dev-\u003edriver-\u003ename` a NULL-page dereference, and the freed-module variant faults on unmapped vmalloc memory \u2014 either way an oops in the driver-core read path, repeatable at will for a reliable local denial of service."
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-05T11:57:39.250Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
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"url": "https://git.kernel.org/stable/c/abe56be73eb10a677d16066f65ff9d30251f5eee"
},
{
"url": "https://git.kernel.org/stable/c/2b344e779d9afd0fcb5ee4000e4d0fc7d8d867eb"
},
{
"url": "https://git.kernel.org/stable/c/3781e4b83e174364998855de777e184cf0b62c40"
},
{
"url": "https://git.kernel.org/stable/c/18daa52418e7e4629ed1703b64777294209d2622"
}
],
"title": "driver core: fix potential NULL pointer dereference in dev_uevent()",
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"assignerShortName": "Linux",
"cveId": "CVE-2025-37800",
"datePublished": "2025-05-08T06:26:01.125Z",
"dateReserved": "2025-04-16T04:51:23.941Z",
"dateUpdated": "2026-08-05T11:57:39.250Z",
"state": "PUBLISHED"
},
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"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2025-37800",
"date": "2026-09-15",
"epss": "0.00197",
"percentile": "0.09624"
},
"microsoft_vex": {
"current_release_date": "2026-09-12T01:44:35.000Z",
"cve": "CVE-2025-37800",
"id": "msrc_CVE-2025-37800",
"initial_release_date": "2025-07-11T00:00:00.000Z",
"product_status:fixed": "2",
"product_status:known_affected": "7",
"source": "Microsoft CSAF VEX",
"status": "final",
"title": "driver core: fix potential NULL pointer dereference in dev_uevent()",
"url": "https://msrc.microsoft.com/csaf/vex/2025/msrc_cve-2025-37800.json",
"version": "7"
},
"nvd": "{\"cve\":{\"id\":\"CVE-2025-37800\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-05-08T07:15:50.420\",\"lastModified\":\"2026-07-30T06:22:21.297\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"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-\u003edriver from a\\nvalid pointer to NULL may result in crash. Fix this by using READ_ONCE()\\nwhen fetching the pointer, and take bus\u0027 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.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: n\u00facleo del controlador: se corrige una posible desreferencia de puntero nulo en dev_uevent(). Si el espacio de usuario lee el atributo de dispositivo \\\"uevent\\\" al mismo tiempo que otro subproceso desvincula el dispositivo de su controlador, cambiar de un puntero v\u00e1lido a nulo en dev-\u0026gt;driver puede provocar un fallo. Se soluciona esto usando READ_ONCE() al obtener el puntero y bloqueando la lista de k de los controladores del bus para garantizar que la instancia del controlador no desaparezca al acceder a ella. Use WRITE_ONCE() al configurar el puntero del controlador para evitar cortes.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/base/base.h\",\"drivers/base/bus.c\",\"drivers/base/core.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"16574dccd8f62dc1b585325f8a6a0aab10047ed8\",\"lessThan\":\"abe56be73eb10a677d16066f65ff9d30251f5eee\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"16574dccd8f62dc1b585325f8a6a0aab10047ed8\",\"lessThan\":\"2b344e779d9afd0fcb5ee4000e4d0fc7d8d867eb\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"16574dccd8f62dc1b585325f8a6a0aab10047ed8\",\"lessThan\":\"3781e4b83e174364998855de777e184cf0b62c40\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"16574dccd8f62dc1b585325f8a6a0aab10047ed8\",\"lessThan\":\"18daa52418e7e4629ed1703b64777294209d2622\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/base/base.h\",\"drivers/base/bus.c\",\"drivers/base/core.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"2.6.22\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"2.6.22\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.89\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.26\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.14.5\",\"lessThanOrEqual\":\"6.14.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.15\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H\",\"baseScore\":7.1,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.2},{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-476\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"6.6.89\",\"matchCriteriaId\":\"4D51CA5E-345A-4098-B85D-3F2BED7BF3A0\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.7\",\"versionEndExcluding\":\"6.12.26\",\"matchCriteriaId\":\"22F52099-F422-4D19-8283-45F9F9BF4392\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.13\",\"versionEndExcluding\":\"6.14.5\",\"matchCriteriaId\":\"6B25CA7E-4CD0-46DB-B4EF-13A3516071FB\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.15:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"8D465631-2980-487A-8E65-40AE2B9F8ED1\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.15:rc2:*:*:*:*:*:*\",\"matchCriteriaId\":\"4C9D071F-B28E-46EC-AC61-22B913390211\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.15:rc3:*:*:*:*:*:*\",\"matchCriteriaId\":\"13FC0DDE-E513-465E-9E81-515702D49B74\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/18daa52418e7e4629ed1703b64777294209d2622\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/2b344e779d9afd0fcb5ee4000e4d0fc7d8d867eb\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/3781e4b83e174364998855de777e184cf0b62c40\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/abe56be73eb10a677d16066f65ff9d30251f5eee\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}",
"redhat_vex": {
"aggregate_severity": "Moderate",
"current_release_date": "2026-07-30T09:29:22+00:00",
"cve": "CVE-2025-37800",
"id": "CVE-2025-37800",
"initial_release_date": "2025-05-08T00:00:00+00:00",
"product_status:known_affected": "274",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: driver core: fix potential NULL pointer dereference in dev_uevent()",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-37800.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "moderate",
"current_release_date": "2026-08-29T01:21:42Z",
"cve": "CVE-2025-37800",
"id": "CVE-2025-37800",
"initial_release_date": "2025-05-08T11:40:24Z",
"product_status:known_affected": "394",
"product_status:known_not_affected": "380",
"product_status:recommended": "433",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2025-37800",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2025-37800.json",
"version": "40"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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