CVE-2026-80802
Vulnerability Scoring
Analysis In Progress
CVE-2026-80802 Vulnerability Analysis & Exploit Details
CVE-2026-80802
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-2026-80802 Details
Status: Received on 04 Sep 2026, 16:18 UTC
Published on: 04 Sep 2026, 16:18 UTC
CVSS Release:
CVE-2026-80802 Vulnerability Summary
CVE-2026-80802: In the Linux kernel, the following vulnerability has been resolved: nfc: fdp: bound the device-reported read length and fix an skb leak fdp_nci_i2c_read() takes the next packet length from two device-supplied bytes and never validates it. The value is a u16 used as the i2c_master_recv() count into a 261-byte on-stack buffer: a malicious, counterfeit or malfunctioning controller (or an i2c bus interposer) can drive it far past the buffer for a stack out-of-bounds write that clobbers the canary and return address, or below the minimum frame size (directly, or by truncating the computed sum) so the header/LRC strip and the next length read run past a short receive. Reject a length outside [FDP_NCI_I2C_MIN_PAYLOAD, FDP_NCI_I2C_MAX_PAYLOAD], as a corrupted packet already is, and force resynchronization. The same loop allocates one data skb per iteration and assumes a length packet followed by a data packet; a device that sends two data packets in one call leaks the first skb when the second allocation overwrites it. Free a previously allocated skb before allocating the next.
Assessing the Risk of CVE-2026-80802
Access Complexity Graph
The exploitability of CVE-2026-80802 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-2026-80802
No exploitability data is available for CVE-2026-80802.
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-2026-80802, 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-2026-80802, 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-2026-80802 does not compromise confidentiality.
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Integrity:
None
CVE-2026-80802 does not impact data integrity.
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Availability:
None
CVE-2026-80802 does not affect system availability.
CVE-2026-80802 References
External References
- https://git.kernel.org/stable/c/0d723090645b82c1cb27cfd7ebf81f0e7c96bcae
- https://git.kernel.org/stable/c/1aa3fc769b0c45bd19f8dab1697084c2b3f6d706
- https://git.kernel.org/stable/c/1fc32327b927a6e2cde086f82575c29880844228
- https://git.kernel.org/stable/c/7ad21dcfeb5181af0c3ee2608808c0c0a5283aa1
- https://git.kernel.org/stable/c/8d2c243b79854628ff076c38748c020042f02f57
- https://git.kernel.org/stable/c/d9498ab9a78cb63d78dbe4f221d8cc6c91f285ee
- https://git.kernel.org/stable/c/db7e464b350969c6ea8340de00d9796e5fd5123b
- https://git.kernel.org/stable/c/e5eec121f2c3bc4c7022613bedd9121a8aa4c949
- https://git.kernel.org/stable/c/fc3c2bd5b1ec6c7cbc8a50e32d9bcec114f25463
CWE Common Weakness Enumeration
Unknown
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