CVE-2026-43502
Vulnerability Scoring
Analysis In Progress
CVE-2026-43502 Vulnerability Analysis & Exploit Details
CVE-2026-43502
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-2026-43502 Details
Status: Received on 21 May 2026, 13:16 UTC
Published on: 21 May 2026, 13:16 UTC
CVSS Release:
CVE-2026-43502 Vulnerability Summary
CVE-2026-43502: In the Linux kernel, the following vulnerability has been resolved: net/rds: handle zerocopy send cleanup before the message is queued A zerocopy send can fail after user pages have been pinned but before the message is attached to the sending socket. The purge path currently infers zerocopy state from rm->m_rs, so an unqueued message can be cleaned up as if it owned normal payload pages. However, zerocopy ownership is really determined by the presence of op_mmp_znotifier, regardless of whether the message has reached the socket queue. Capture op_mmp_znotifier up front in rds_message_purge() and use it as the cleanup discriminator. If the message is already associated with a socket, keep the existing completion path. Otherwise, drop the pinned page accounting directly and release the notifier before putting the payload pages. This keeps early send failure cleanup consistent with the zerocopy lifetime rules without changing the normal queued completion path.
Assessing the Risk of CVE-2026-43502
Access Complexity Graph
The exploitability of CVE-2026-43502 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-2026-43502
No exploitability data is available for CVE-2026-43502.
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-2026-43502, 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-2026-43502, 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-2026-43502 does not compromise confidentiality.
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Integrity:
None
CVE-2026-43502 does not impact data integrity.
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Availability:
None
CVE-2026-43502 does not affect system availability.
CVE-2026-43502 References
External References
- https://git.kernel.org/stable/c/0f5c185fc79a59ee9991234dd6d2a3e5afa6e75b
- https://git.kernel.org/stable/c/14ef6fd18db2494098b21e0471bf27a1d8e9993e
- https://git.kernel.org/stable/c/21d70744e6d3bbf9293aa1ee6fba7c53ad75275e
- https://git.kernel.org/stable/c/3abc8983b2bae3f487f77d9da5527d7d6b210d46
- https://git.kernel.org/stable/c/44b550d88b267320459d518c0743a241ab2108fa
CWE Common Weakness Enumeration
Unknown
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