CVE-2026-63870
Vulnerability Scoring
Analysis In Progress
CVE-2026-63870 Vulnerability Analysis & Exploit Details
CVE-2026-63870
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-2026-63870 Details
Status: Received on 19 Jul 2026, 15:16 UTC
Published on: 19 Jul 2026, 15:16 UTC
CVSS Release:
CVE-2026-63870 Vulnerability Summary
CVE-2026-63870: In the Linux kernel, the following vulnerability has been resolved: ieee802154: 6lowpan: only accept IPv6 packets in lowpan_xmit() The aoe driver (or similar) generates a non-IPv6 packet (e.g., ETH_P_AOE) and queues it for transmission via dev_queue_xmit() on a 6LoWPAN interface (configured by the user or test case). Since the packet is not IPv6, the 6LoWPAN header_ops->create function (lowpan_header_create or header_create) returns early without initializing the lowpan_addr_info structure in the skb headroom. In the transmit function (lowpan_xmit), the driver calls lowpan_header (or setup_header) which unconditionally copies and uses the lowpan_addr_info from the headroom, which contains uninitialized data. Fix this by dropping non IPv6 packets. A similar fix is needed in net/bluetooth/6lowpan.c bt_xmit().
Assessing the Risk of CVE-2026-63870
Access Complexity Graph
The exploitability of CVE-2026-63870 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-2026-63870
No exploitability data is available for CVE-2026-63870.
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-2026-63870, 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-2026-63870, 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-2026-63870 does not compromise confidentiality.
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Integrity:
None
CVE-2026-63870 does not impact data integrity.
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Availability:
None
CVE-2026-63870 does not affect system availability.
CVE-2026-63870 References
External References
- https://git.kernel.org/stable/c/1a827b95e62b4cbe851ae7cc9c961cdfa769cca4
- https://git.kernel.org/stable/c/285b0842f2e01c3edf805f1fd64da11d9b7f6b4c
- https://git.kernel.org/stable/c/3150e6d3223dfc356308125cabf9c34169842d2a
- https://git.kernel.org/stable/c/3a5f3f7aff18bcc36a57839cf50cf0cc8de707f3
- https://git.kernel.org/stable/c/87172cc8dc49aaf54407a31edffb0232f8cb93ab
- https://git.kernel.org/stable/c/8da95cb6ad7d656c871e776a9c7b77e894d6d89c
- https://git.kernel.org/stable/c/af07fffbd53ddc3ec3c2a4ca914f27899fa89bca
- https://git.kernel.org/stable/c/c1819c8defa235c7beda859bc185b1c429a55ecd
CWE Common Weakness Enumeration
Unknown
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