CVE-2025-38495

Kernel memory corruption via undersized HID report buffer

Published Jul 28, 2025 · Updated Aug 5, 2026

Out-of-bounds memory access in the Linux kernel HID core allows adjacent attackers to corrupt kernel memory via crafted HID reports. hid_alloc_report_buf allocates seven padding bytes but omits the extra report-ID byte required when report->id is zero, leaving transport operations one byte beyond the allocation. An unauthenticated malicious or spoofed Bluetooth HID peripheral reaches the path during automatic enumeration and can disclose or corrupt adjacent kernel heap data or crash the host.

CVSS severity8.8
High
EPSS probability0.30%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds memory access in the Linux kernel HID core allows adjacent attackers to corrupt kernel memory via crafted HID reports. hid_alloc_report_buf allocates seven padding bytes but omits the extra report-ID byte required when report->id is zero, leaving transport operations one byte beyond the allocation. An unauthenticated malicious or spoofed Bluetooth HID peripheral reaches the path during automatic enumeration and can disclose or corrupt adjacent kernel heap data or crash the host.

The record

CVE
CVE-2025-38495
Published
Jul 28, 2025
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1200
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 28, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=3.15
  2. Affected versionversion=4fa5a7f76cc7b6ac87f57741edd2b124851d119f <4f15ee98304b96e164ff2340e1dfd6181c3f42aa
  3. Affected versionversion=4fa5a7f76cc7b6ac87f57741edd2b124851d119f <7228e36c7875e4b035374cf68ca5e44dffa596b2
  4. Affected versionversion=4fa5a7f76cc7b6ac87f57741edd2b124851d119f <7fa83d0043370003e9a0b46ab7ae8f53b00fab06
  5. Affected versionversion=4fa5a7f76cc7b6ac87f57741edd2b124851d119f <9f2892f7233a8f1320fe671d0f95f122191bfbcd
  6. Affected versionversion=4fa5a7f76cc7b6ac87f57741edd2b124851d119f <a262370f385e53ff7470efdcdaf40468e5756717
  7. Affected versionversion=4fa5a7f76cc7b6ac87f57741edd2b124851d119f <a47d9d9895bad9ce0e840a39836f19ca0b2a343a
  8. Affected versionversion=4fa5a7f76cc7b6ac87f57741edd2b124851d119f <d3ed1d84a84538a39b3eb2055d6a97a936c108f2
  9. Affected versionversion=4fa5a7f76cc7b6ac87f57741edd2b124851d119f <fcda39a9c5b834346088c14b1374336b079466c1

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=3.15; version=4fa5a7f76cc7b6ac87f57741edd2b124851d119f <4f15ee98304b96e164ff2340e1dfd6181c3f42aa; version=4fa5a7f76cc7b6ac87f57741edd2b124851d119f <7228e36c7875e4b035374cf68ca5e44dffa596b2; version=4fa5a7f76cc7b6ac87f57741edd2b124851d119f <7fa83d0043370003e9a0b46ab7ae8f53b00fab06; version=4fa5a7f76cc7b6ac87f57741edd2b124851d119f <9f2892f7233a8f1320fe671d0f95f122191bfbcd; version=4fa5a7f76cc7b6ac87f57741edd2b124851d119f <a262370f385e53ff7470efdcdaf40468e5756717; version=4fa5a7f76cc7b6ac87f57741edd2b124851d119f <a47d9d9895bad9ce0e840a39836f19ca0b2a343a; version=4fa5a7f76cc7b6ac87f57741edd2b124851d119f <d3ed1d84a84538a39b3eb2055d6a97a936c108f2; version=4fa5a7f76cc7b6ac87f57741edd2b124851d119f <fcda39a9c5b834346088c14b1374336b079466c1

Published CVSS scores

8.8kernel.orgCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1200Hardware Additions

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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