CVE-2026-98354
Vulnerability Scoring
Analysis In Progress
CVE-2026-98354 Vulnerability Analysis & Exploit Details
CVE-2026-98354
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-2026-98354 Details
Status: Received on 06 Oct 2026, 09:18 UTC
Published on: 06 Oct 2026, 09:18 UTC
CVSS Release:
CVE-2026-98354 Vulnerability Summary
CVE-2026-98354: In the Linux kernel, the following vulnerability has been resolved: RDMA/mad: Fix receive buffer leak when PKey enforcement fails ib_mad_complete_recv() initializes mad_recv_wc->rmpp_list and then runs ib_mad_enforce_security() before linking recv_buf onto that list. On failure it calls ib_free_recv_mad(), which only walks rmpp_list and frees the ib_mad_private of every buffer found there. As the list is still empty at that point, nothing is freed at all. The caller cannot clean up either: ib_mad_recv_done() sets recv to NULL right after ib_mad_complete_recv() returns, assuming the MAD layer took ownership of the buffer. Every MAD that fails the PKey check therefore leaks one ib_mad_private (about 300 bytes per IB port MAD, ~2K for OPA), and a remote node can trigger this repeatedly by sending MADs with a wrong PKey. Link recv_buf onto rmpp_list right after the list is initialized, so the error path has something to free.
Assessing the Risk of CVE-2026-98354
Access Complexity Graph
The exploitability of CVE-2026-98354 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-2026-98354
No exploitability data is available for CVE-2026-98354.
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-2026-98354, 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-2026-98354, 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-2026-98354 does not compromise confidentiality.
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Integrity:
None
CVE-2026-98354 does not impact data integrity.
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Availability:
None
CVE-2026-98354 does not affect system availability.
CVE-2026-98354 References
External References
- https://git.kernel.org/stable/c/3476c28c9addfa253f505e6bd87f1f5598b961d0
- https://git.kernel.org/stable/c/39c4ea72a40503e102ae07e6776005f96ca078a6
- https://git.kernel.org/stable/c/4617c9a856188674dddb0ca66979746d07688579
- https://git.kernel.org/stable/c/5091e25ec503f7fc02723ca435226467b68caac7
- https://git.kernel.org/stable/c/752b30e9d339008e5ce7eed412e9446078916129
- https://git.kernel.org/stable/c/8e2036fb47a5b152d53eadbd35abf311bd34cc7f
- https://git.kernel.org/stable/c/bad289e42f512646a988f278f536d21547df73f1
- https://git.kernel.org/stable/c/c0d8df85db146d6275e226cb950023be69dd6c77
CWE Common Weakness Enumeration
Unknown
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