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ReviewHigh

CVE-2026-74507

Linux

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: HIDP: validate numbered report payloads When hidp_get_raw_report() waits for a numbered report, hidp_process_data() compares the expected report number with skb->data[0]. A connected HIDP peer can reply with only a DATA transaction header, leaving the skb empty after the header is removed. KMSAN reports an uninitialized-value use in hidp_session_run(), with the value originating in __alloc_skb() through vhci_write(). The transaction header checks remove the empty-frame reports, but this report remains until the p...

CVSS
7.1
EPSS
-
- percentile
CISA KEV
Not listed
Published
2026.08.15
PRIORITY ASSESSMENT

Review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability-
Technical severityCVSS 7.1

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: HIDP: validate numbered report payloads When hidp_get_raw_report() waits for a numbered report, hidp_process_data() compares the expected report number with skb->data[0]. A connected HIDP peer can reply with only a DATA transaction header, leaving the skb empty after the header is removed. KMSAN reports an uninitialized-value use in hidp_session_run(), with the value originating in __alloc_skb() through vhci_write(). The transaction header checks remove the empty-frame reports, but this report remains until the p...

Affected product and versions

Product
Linux
Affected versions
>= 0ff1731a1ae51e8e48cd559d70db536281c47f8e < 011bf4350d941f1995b2bd4b815ee206cacf2b8e, >= 0ff1731a1ae51e8e48cd559d70db536281c47f8e < 689d8bb7fee96b7196b572b015b6055c6616ce0c, >= 0ff1731a1ae51e8e48cd559d70db536281c47f8e < c73beb320f5705e508bf7d385b8cc5ef8d9c8b69, >= 0ff1731a1ae51e8e48cd559d70db536281c47f8e < b7ad105d46acd828e424454815e4cd31069e047a, >= 0ff1731a1ae51e8e48cd559d70db536281c47f8e < 7e7162427659b70ea17cd41b1f79e2e64c246690, >= 0ff1731a1ae51e8e48cd559d70db536281c47f8e < 27cc0e603355c585f1e5da8398faa4d36d498188, >= 0ff1731a1ae51e8e48cd559d70db536281c47f8e < 9c841f59e10b5d75c398a3fc6b2da448d2a2276b, >= 0ff1731a1ae51e8e48cd559d70db536281c47f8e < 34f53d27b81a16a02828c8fdfa4e02badc326f17, >= 2.6.39
Fixed versions
No verified fixed-version field is available yet

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N
CWE
Not available