CVE-2026-74507

Uninitialized-value use via empty HIDP report

Published Aug 15, 2026 · Updated Aug 15, 2026

Out-of-bounds read in Linux kernel HIDP allows physically proximate attackers to consume a byte beyond a declared L2CAP PDU. The hidp_process_data() function removes the DATA header and reads skb->data[0] without verifying that a numbered report retains a payload byte. A connected Bluetooth HIDP peer can supply an empty or undersized response, causing uninitialized-value use or incorrect completion of HIDIOCGFEATURE with a zero-byte result.

CVSS severity7.1
High
EPSS probability0.24%
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 read in Linux kernel HIDP allows physically proximate attackers to consume a byte beyond a declared L2CAP PDU. The hidp_process_data() function removes the DATA header and reads skb->data[0] without verifying that a numbered report retains a payload byte. A connected Bluetooth HIDP peer can supply an empty or undersized response, causing uninitialized-value use or incorrect completion of HIDIOCGFEATURE with a zero-byte result.

The record

CVE
CVE-2026-74507
Published
Aug 15, 2026
Updated
Aug 15, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-824
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 15, 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=0ff1731a1ae51e8e48cd559d70db536281c47f8e <27cc0e603355c585f1e5da8398faa4d36d498188
  2. Affected versionversion=0ff1731a1ae51e8e48cd559d70db536281c47f8e <34f53d27b81a16a02828c8fdfa4e02badc326f17
  3. Affected versionversion=0ff1731a1ae51e8e48cd559d70db536281c47f8e <7e7162427659b70ea17cd41b1f79e2e64c246690
  4. Affected versionversion=0ff1731a1ae51e8e48cd559d70db536281c47f8e <9c841f59e10b5d75c398a3fc6b2da448d2a2276b
  5. Affected versionversion=0ff1731a1ae51e8e48cd559d70db536281c47f8e <b7ad105d46acd828e424454815e4cd31069e047a
  6. Affected versionversion=2.6.39

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=0ff1731a1ae51e8e48cd559d70db536281c47f8e <27cc0e603355c585f1e5da8398faa4d36d498188; version=0ff1731a1ae51e8e48cd559d70db536281c47f8e <34f53d27b81a16a02828c8fdfa4e02badc326f17; version=0ff1731a1ae51e8e48cd559d70db536281c47f8e <7e7162427659b70ea17cd41b1f79e2e64c246690; version=0ff1731a1ae51e8e48cd559d70db536281c47f8e <9c841f59e10b5d75c398a3fc6b2da448d2a2276b; version=0ff1731a1ae51e8e48cd559d70db536281c47f8e <b7ad105d46acd828e424454815e4cd31069e047a; version=2.6.39

Published CVSS scores

5.5Red HatCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
7.1Linux CNACVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N

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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-824Access of Uninitialized Pointer

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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