CVE-2026-53263
Vulnerability Scoring
Analysis In Progress
CVE-2026-53263 Vulnerability Analysis & Exploit Details
CVE-2026-53263
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-2026-53263 Details
Status: Received on 25 Jun 2026, 09:16 UTC
Published on: 25 Jun 2026, 09:16 UTC
CVSS Release:
CVE-2026-53263 Vulnerability Summary
CVE-2026-53263: In the Linux kernel, the following vulnerability has been resolved: 6lowpan: fix off-by-one in multicast context address compression The second memcpy in lowpan_iphc_mcast_ctx_addr_compress() uses &data[1] as destination and &ipaddr->s6_addr[11] as source, but both should be offset by one: &data[2] and &ipaddr->s6_addr[12] respectively. This off-by-one has two consequences: 1. data[1] is overwritten with s6_addr[11], corrupting the RIID field in the compressed multicast address 2. data[5] is never written, so uninitialized kernel stack memory is transmitted over the network via lowpan_push_hc_data(), leaking kernel stack contents The correct inline data layout must match what the decompression function lowpan_uncompress_multicast_ctx_daddr() expects: data[0..1] = s6_addr[1..2] (flags/scope + RIID) data[2..5] = s6_addr[12..15] (group ID) Also zero-initialize the data array as a defensive measure against similar bugs in the future.
Assessing the Risk of CVE-2026-53263
Access Complexity Graph
The exploitability of CVE-2026-53263 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-2026-53263
No exploitability data is available for CVE-2026-53263.
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-2026-53263, 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-2026-53263, 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-2026-53263 does not compromise confidentiality.
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Integrity:
None
CVE-2026-53263 does not impact data integrity.
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Availability:
None
CVE-2026-53263 does not affect system availability.
CVE-2026-53263 References
External References
- https://git.kernel.org/stable/c/06ce6fc106b16dec9b535950db626261be865e5b
- https://git.kernel.org/stable/c/2a58899d11009bffc7b4b32a571858f381121837
- https://git.kernel.org/stable/c/4485d79617520d84ba5a14515e2b5136007d6deb
- https://git.kernel.org/stable/c/c32f30ef5e66adbfa102348e2e8a23776eb007cb
- https://git.kernel.org/stable/c/da8808463882c3f3c357b072e25053c2121f1419
- https://git.kernel.org/stable/c/da8cbb64b47e9066b40af0de170901caf17b768c
- https://git.kernel.org/stable/c/dcb1bec1c32ee5c3878354e087cf5dbee2b7c7af
- https://git.kernel.org/stable/c/f24a58c72a45f4c109f3557a760cc4b60b7a6037
CWE Common Weakness Enumeration
Unknown
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