Linux Kernel up to 7.1.8 f_ncm ndp_index out-of-bounds

CVSS Meta Temp Score
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CTI Interest Score
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6.0$0-$5k0.43

Summaryinfo

A vulnerability labeled as critical has been found in Linux Kernel up to 7.1.8. The affected element is an unknown function of the component f_ncm. The manipulation of the argument ndp_index results in out-of-bounds. This vulnerability was named CVE-2026-74679. The attack may be performed from remote. There is no available exploit.

Detailsinfo

A vulnerability classified as critical has been found in Linux Kernel up to 7.1.8. Affected is an unknown part of the component f_ncm. The manipulation of the argument ndp_index with an unknown input leads to a out-of-bounds vulnerability. CWE is classifying the issue as CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: usb: gadget: f_ncm: Use unsigned int for ndp_index The variable ndp_index is declared as a signed integer, but it stores the return value of get_ncm(), which is unsigned. A malicious host can supply a large offset that overflows the signed ndp_index, making it negative. Because ndp_index is compared against unsigned bounds, this negative value bypasses sanity checks and leads to an out-of-bounds read when calculating the address of the NDP block (ntb_ptr + ndp_index). Fix this by changing ndp_index to unsigned int to ensure consistent unsigned comparisons throughout the function.

The advisory is shared for download at git.kernel.org. This vulnerability is traded as CVE-2026-74679 since 08/15/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 08/22/2026).

Upgrading to version 5.10.265, 5.15.216, 6.1.183, 6.6.152, 6.12.104, 6.18.45 or 7.1.9 eliminates this vulnerability. Applying the patch 9c8c6825a750fcd3efbe922847ca70ccd5a66857/a1c0deeba4a46481543d6b09c665f758c54c3a1a/d13f650a3485b58c124b3cda45597e8002c9c833/11413d7ed42174b8f5d8d0b6a25d10dc88239b21/5b2b3a3229a3f4c493ffdee53aee2f173b6f13b3/d328fdc607fa1bb668ad512e1c918a120f78f337/fc9e54e22845c4da29588ca0986cb7c795b5a262/6b1c8a9403a26cb0fed7a648916c74dc236da591 is able to eliminate this problem.

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Productinfo

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Version

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 6.0

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

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

Exploitinginfo

Class: Out-of-bounds
CWE: CWE-125 / CWE-119
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 5.10.265/5.15.216/6.1.183/6.6.152/6.12.104/6.18.45/7.1.9
Patch: 9c8c6825a750fcd3efbe922847ca70ccd5a66857/a1c0deeba4a46481543d6b09c665f758c54c3a1a/d13f650a3485b58c124b3cda45597e8002c9c833/11413d7ed42174b8f5d8d0b6a25d10dc88239b21/5b2b3a3229a3f4c493ffdee53aee2f173b6f13b3/d328fdc607fa1bb668ad512e1c918a120f78f337/fc9e54e22845c4da29588ca0986cb7c795b5a262/6b1c8a9403a26cb0fed7a648916c74dc236da591

Timelineinfo

08/15/2026 CVE reserved
08/22/2026 +7 days Advisory disclosed
08/22/2026 +0 days VulDB entry created
08/22/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-74679 (🔒)
GCVE (CVE): GCVE-0-2026-74679
GCVE (VulDB): GCVE-100-394488

Entryinfo

Created: 08/22/2026 19:02
Changes: 08/22/2026 19:02 (59)
Complete: 🔍
Cache ID: 216::103

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