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CVE Record

CVE-2025-37800: driver core: fix potential NULL pointer dereference in dev_uevent()

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.

HighCVSS 7.1Not KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

A race in the Linux kernel device-driver subsystem can dereference an invalid driver pointer when one process reads a device’s uevent attribute while another unbinds that device. The documented result is a kernel crash, creating local denial-of-service risk. The CVSS record also indicates possible confidentiality impact, but the supplied description does not explain that impact.

Executive priority

Treat this as a high-priority kernel maintenance issue, especially on shared or multi-tenant Linux systems. It is less urgent than a remotely exploitable vulnerability, but successful triggering may crash the host. Follow distribution guidance promptly; emergency action is not supported by the supplied exploitation evidence.

Technical view

Concurrent uevent reads and driver unbinding can change dev->driver from valid to NULL during access. The kernel fix fetches the pointer with READ_ONCE(), protects driver lifetime using the bus drivers klist lock, and applies WRITE_ONCE() when assigning the pointer to prevent tearing.

Likely exposure

Exposure applies to affected Linux kernel builds where a low-privileged local user can reach the relevant device attribute while driver unbinding occurs. The record lists affected versions from 2.6.22 through several 2025 branches, but its version data is insufficient to determine precise distribution package boundaries.

Exploitation context

The supplied record does not report known active exploitation, and CVE-2025-37800 is not identified as KEV. Exploitation requires local access and a specific concurrency condition. A kernel crash is documented; the source bundle provides no exploit evidence or demonstrated information-disclosure mechanism.

Researcher notes

The CVSS 3.1 vector is 7.1: local, low complexity, low privileges, no interaction, with high confidentiality and availability impacts. Only the crash condition is described. Exact affected and fixed package ranges remain distribution-specific, and the bundle’s duplicated commit identifier and unusual version entry “0” reduce version-boundary confidence.

Mitigation direction

  • Install a vendor-supported kernel containing the applicable stable fix or distribution backport.
  • Check Linux distribution advisories for exact fixed package versions before deployment.
  • Prioritize multi-user systems where untrusted local users can access relevant device attributes.
  • Use normal change controls and reboot into the updated kernel when required.

Validation and detection

  • Record each system’s running kernel version and distribution package release.
  • Confirm the vendor package includes one of the referenced fixes or an equivalent backport.
  • Verify systems booted into the updated kernel after installation.
  • Review local-user exposure and permissions around device management interfaces.
Prepared
Confidence
medium
Sources
6

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

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CVE-2025-37800 mapping review

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Vulnerability profileCVE Program record
Severity
High
CVSS
7.1 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

1CVSS vectors
3Timeline events
0ADP providers
5Source links

CVSS vector scores

1 official score

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
7.1CVSS 3.1HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H1.85.2Linux

Vulnerability scoring details

Base CVSS 3.1 score

7.1High
CVSS 3.1 vector shape for CVE-2025-37800Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  2. CVE publishedCVE Program

    The CVE record was published.

  3. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinux16574dccd8f62dc1b585325f8a6a0aab10047ed8, 16574dccd8f62dc1b585325f8a6a0aab10047ed8, 16574dccd8f62dc1b585325f8a6a0aab10047ed8, 16574dccd8f62dc1b585325f8a6a0aab10047ed8unaffected
LinuxLinux2.6.22, 0, 6.6.89, 6.12.26, 6.14.5, 6.15affected
Weakness

CWE details

No CWE listed

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