Linux Kernel up to 7.2-rc5 Bluetooth HIDP hidp_session_run uninitialized pointer

CVSS Meta Temp Score
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CTI Interest Score
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9.5$0-$5k0.48

Summaryinfo

A vulnerability identified as very critical has been detected in Linux Kernel up to 6.6.150/6.12.102/6.18.43/7.1.7/7.2-rc5. This vulnerability affects the function hidp_session_run of the component Bluetooth HIDP. The manipulation leads to uninitialized pointer. This vulnerability is listed as CVE-2026-74507. The attack may be initiated remotely. There is no available exploit.

Detailsinfo

A vulnerability was found in Linux Kernel up to 6.6.150/6.12.102/6.18.43/7.1.7/7.2-rc5. It has been rated as very critical. This issue affects the function hidp_session_run of the component Bluetooth HIDP. The manipulation with an unknown input leads to a uninitialized pointer vulnerability. Using CWE to declare the problem leads to CWE-824. The product accesses or uses a pointer that has not been initialized. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

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 payload check is added. The comparison can also consume a peer-controlled byte beyond the declared L2CAP PDU. A DATA | FEATURE response followed by an extra 0x01 byte made the current code accept that byte as report ID 1 and complete HIDIOCGFEATURE with a zero-byte result. With this change the malformed response is rejected with -EIO, while a subsequent valid response still succeeds. Require a payload byte before comparing a numbered report ID. Unnumbered reports continue to accept an empty payload.

The advisory is shared at git.kernel.org. The identification of this vulnerability is CVE-2026-74507 since 08/15/2026. The exploitation is known to be easy. The attack may be initiated remotely. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 08/15/2026).

Upgrading to version 6.6.151, 6.12.103, 6.18.44, 7.1.8 or 7.2-rc6 eliminates this vulnerability. Applying the patch b7ad105d46acd828e424454815e4cd31069e047a/7e7162427659b70ea17cd41b1f79e2e64c246690/27cc0e603355c585f1e5da8398faa4d36d498188/9c841f59e10b5d75c398a3fc6b2da448d2a2276b/34f53d27b81a16a02828c8fdfa4e02badc326f17 is able to eliminate this problem.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 9.9
VulDB Meta Temp Score: 9.5

VulDB Base Score: 9.9
VulDB Temp Score: 9.5
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Uninitialized pointer
CWE: CWE-824 / CWE-908
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 6.6.151/6.12.103/6.18.44/7.1.8/7.2-rc6
Patch: b7ad105d46acd828e424454815e4cd31069e047a/7e7162427659b70ea17cd41b1f79e2e64c246690/27cc0e603355c585f1e5da8398faa4d36d498188/9c841f59e10b5d75c398a3fc6b2da448d2a2276b/34f53d27b81a16a02828c8fdfa4e02badc326f17

Timelineinfo

08/15/2026 Advisory disclosed
08/15/2026 +0 days CVE reserved
08/15/2026 +0 days VulDB entry created
08/15/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-74507 (🔒)
GCVE (CVE): GCVE-0-2026-74507
GCVE (VulDB): GCVE-100-390833

Entryinfo

Created: 08/15/2026 15:31
Changes: 08/15/2026 15:31 (59)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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