CVE-2026-68368
Vulnerability Scoring
Analysis In Progress
CVE-2026-68368 Vulnerability Analysis & Exploit Details
CVE-2026-68368
Attack Complexity Details
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Attack Complexity:
Attack Complexity Analysis In Progress
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Attack Vector:
Attack Vector Under Analysis
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Privileges Required:
None
No authentication is required for exploitation.
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Scope:
Impact is confined to the initially vulnerable component.
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User Interaction:
None
No user interaction is necessary for exploitation.
CVE-2026-68368 Details
Status: Received on 10 Aug 2026, 13:20 UTC
Last updated: 🕔 19 Aug 2026, 17:20 UTC
Originally published on: 🕐 10 Aug 2026, 13:20 UTC
Time between publication and last update: 9 days
CVSS Release:
CVE-2026-68368 Vulnerability Summary
CVE-2026-68368: In the Linux kernel, the following vulnerability has been resolved: usb: gadget: f_ncm: validate datagram bounds in ncm_unwrap_ntb() When unpacking host-supplied NTBs, ncm_unwrap_ntb() checks datagram length against frame_max but does not verify that the datagram fits within the declared block length. Additionally, when decoding multiple NTBs from a single socket buffer, subsequent block lengths are not checked against the actual remaining buffer data. With these checks missing, a malicious USB host can specify datagram offsets and lengths that point beyond the block, or supply secondary NTB headers declaring lengths larger than the buffer. skb_put_data() then copies adjacent kernel memory from skb_shared_info into the network skb. Fix this by verifying that sufficient buffer space remains for the NTB header before parsing, handling zero-length block declarations, ensuring that block lengths never exceed the remaining buffer space, and verifying that each datagram payload stays strictly within the block boundary.
Assessing the Risk of CVE-2026-68368
Access Complexity Graph
The exploitability of CVE-2026-68368 depends on two key factors: attack complexity (the level of effort required to execute an exploit) and privileges required (the access level an attacker needs).
Exploitability Analysis for CVE-2026-68368
No exploitability data is available for CVE-2026-68368.
Understanding AC and PR
A lower complexity and fewer privilege requirements make exploitation easier. Security teams should evaluate these aspects to determine the urgency of mitigation strategies, such as patch management and access control policies.
Attack Complexity (AC) measures the difficulty in executing an exploit. A high AC means that specific conditions must be met, making an attack more challenging, while a low AC means the vulnerability can be exploited with minimal effort.
Privileges Required (PR) determine the level of system access necessary for an attack. Vulnerabilities requiring no privileges are more accessible to attackers, whereas high privilege requirements limit exploitation to authorized users with elevated access.
CVSS Score Breakdown Chart
Above is the CVSS Sub-score Breakdown for CVE-2026-68368, illustrating how Base, Impact, and Exploitability factors combine to form the overall severity rating. A higher sub-score typically indicates a more severe or easier-to-exploit vulnerability.
CIA Impact Analysis
Below is the Impact Analysis for CVE-2026-68368, showing how Confidentiality, Integrity, and Availability might be affected if the vulnerability is exploited. Higher values usually signal greater potential damage.
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Confidentiality:
None
CVE-2026-68368 does not compromise confidentiality.
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Integrity:
None
CVE-2026-68368 does not impact data integrity.
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Availability:
None
CVE-2026-68368 does not affect system availability.
CVE-2026-68368 References
External References
- https://git.kernel.org/stable/c/1febec7e47cdcd01f43fb0211094e3010474666e
- https://git.kernel.org/stable/c/35d15bbaec0557330e774ec31412ef508de6e0e0
- https://git.kernel.org/stable/c/40c706a0224bde194667e3378c689b542fec4b44
- https://git.kernel.org/stable/c/41fd5f2fb0027d3773ae949e3247c2e0a2a7fe5c
- https://git.kernel.org/stable/c/6b2be489eaa6293e60549005d91f15ceb150510f
- https://git.kernel.org/stable/c/e07751d0527ccc2a1c32eb0b0b7da3b4b9b5381f
- https://git.kernel.org/stable/c/f87ed889f0f7417b8938c98d8833f559b755373c
- https://git.kernel.org/stable/c/fff1059d139ef798bab917990524faaf25854ca8
CWE Common Weakness Enumeration
Unknown
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