CVE-2026-98359
Vulnerability Scoring
Analysis In Progress
CVE-2026-98359 Vulnerability Analysis & Exploit Details
CVE-2026-98359
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-2026-98359 Details
Status: Received on 06 Oct 2026, 09:18 UTC
Published on: 06 Oct 2026, 09:18 UTC
CVSS Release:
CVE-2026-98359 Vulnerability Summary
CVE-2026-98359: In the Linux kernel, the following vulnerability has been resolved: RDMA/core: Reject unregistering netdevs in ib_get_eth_speed ib_device_get_netdev() intentionally returns a referenced net_device even when it is unregistering, so matching and cleanup callers can still find the association. The reference keeps struct net_device allocated, but does not guarantee that the device remains operational. ib_get_eth_speed() uses the returned device operationally by invoking its ethtool callback. Although that call is made under RTNL, the function does not verify the registration state first. An asynchronous RDMA port query can therefore call into a netdev after NETDEV_UNREGISTER and ndo_uninit have completed. Check for NETREG_REGISTERED while holding RTNL and return -ENODEV for a device which is being unregistered. Keeping RTNL across the check and the ethtool operation prevents unregister from starting between them. Keep the speed fallback and warning under RTNL as well, so the warning can safely read netdev->name. Drop the netdev reference before releasing RTNL once all accesses to the device are complete.
Assessing the Risk of CVE-2026-98359
Access Complexity Graph
The exploitability of CVE-2026-98359 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-2026-98359
No exploitability data is available for CVE-2026-98359.
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-2026-98359, 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-2026-98359, 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-2026-98359 does not compromise confidentiality.
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Integrity:
None
CVE-2026-98359 does not impact data integrity.
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Availability:
None
CVE-2026-98359 does not affect system availability.
CVE-2026-98359 References
External References
- https://git.kernel.org/stable/c/45c60ffc79771bad154f224a05753191cf1b37bc
- https://git.kernel.org/stable/c/520cd057f138ed8dbe8e05f0eae3a8ed4c5d3a5e
- https://git.kernel.org/stable/c/5bd42f74ec3b4f4687fb600f367af0828d513b3c
- https://git.kernel.org/stable/c/a219459fbd1b2598e63c81a52847eba6c28b72d2
- https://git.kernel.org/stable/c/be4b44c8b47c67a04c08b1a0aba18006b749ae6a
- https://git.kernel.org/stable/c/ef9fbe1b93f3b617b96e86d5cd76b3fa44514cb5
CWE Common Weakness Enumeration
Unknown
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