CVE-2026-46243
Vulnerability Scoring
Analysis In Progress
CVE-2026-46243 Vulnerability Analysis & Exploit Details
CVE-2026-46243
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-2026-46243 Details
Status: Awaiting Analysis
Published on: 01 Jun 2026, 17:17 UTC
CVSS Release:
CVE-2026-46243 Vulnerability Summary
CVE-2026-46243: In the Linux kernel, the following vulnerability has been resolved: smb: client: reject userspace cifs.spnego descriptions cifs.spnego key descriptions contain authority-bearing fields such as pid, uid, creduid, and upcall_target that cifs.upcall treats as kernel-originating inputs. However, userspace can also create keys of this type through request_key(2) or add_key(2), allowing those fields to be supplied without CIFS origin. Only accept cifs.spnego descriptions while CIFS is using its private spnego_cred to request the key.
Assessing the Risk of CVE-2026-46243
Access Complexity Graph
The exploitability of CVE-2026-46243 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-2026-46243
No exploitability data is available for CVE-2026-46243.
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-2026-46243, 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-2026-46243, 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-2026-46243 does not compromise confidentiality.
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Integrity:
None
CVE-2026-46243 does not impact data integrity.
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Availability:
None
CVE-2026-46243 does not affect system availability.
CVE-2026-46243 References
External References
- https://git.kernel.org/stable/c/0aece6685fc80a8de492688ca2315fb86ec379c7
- https://git.kernel.org/stable/c/2035acfb17221729b1b8ac335e941868a04ca079
- https://git.kernel.org/stable/c/3da1fdf4efbc490041eb4f836bf596201203f8f2
- https://git.kernel.org/stable/c/7713bd320ed4fc3d08a227cd8e41242219a16981
- https://git.kernel.org/stable/c/91f89c1d83e80417629791fcef6af8140d7d01c8
- https://git.kernel.org/stable/c/9544559e59438a4b609b2fdfa0763d8360572824
- https://git.kernel.org/stable/c/a3bbda6502a9398b816fa2e71c9a3f955f58013d
- https://git.kernel.org/stable/c/cf20038657d6d4974349556a34e08fe0490bebbc
CWE Common Weakness Enumeration
Unknown
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