CVE-2026-43359
Vulnerability Scoring
Analysis In Progress
CVE-2026-43359 Vulnerability Analysis & Exploit Details
CVE-2026-43359
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-2026-43359 Details
Status: Received on 08 May 2026, 15:16 UTC
Published on: 08 May 2026, 15:16 UTC
CVSS Release:
CVE-2026-43359 Vulnerability Summary
CVE-2026-43359: In the Linux kernel, the following vulnerability has been resolved: btrfs: fix transaction abort on set received ioctl due to item overflow If the set received ioctl fails due to an item overflow when attempting to add the BTRFS_UUID_KEY_RECEIVED_SUBVOL we have to abort the transaction since we did some metadata updates before. This means that if a user calls this ioctl with the same received UUID field for a lot of subvolumes, we will hit the overflow, trigger the transaction abort and turn the filesystem into RO mode. A malicious user could exploit this, and this ioctl does not even requires that a user has admin privileges (CAP_SYS_ADMIN), only that he/she owns the subvolume. Fix this by doing an early check for item overflow before starting a transaction. This is also race safe because we are holding the subvol_sem semaphore in exclusive (write) mode. A test case for fstests will follow soon.
Assessing the Risk of CVE-2026-43359
Access Complexity Graph
The exploitability of CVE-2026-43359 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-2026-43359
No exploitability data is available for CVE-2026-43359.
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-2026-43359, 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-2026-43359, 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-2026-43359 does not compromise confidentiality.
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Integrity:
None
CVE-2026-43359 does not impact data integrity.
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Availability:
None
CVE-2026-43359 does not affect system availability.
CVE-2026-43359 References
External References
- https://git.kernel.org/stable/c/2e57b8cac2ba0d38aac76c1ecdfd8b899e3581a5
- https://git.kernel.org/stable/c/41fb97353ff58fa4f31904c343fc8e3df2f7517d
- https://git.kernel.org/stable/c/87f2c46003fce4d739138aab4af1942b1afdadac
- https://git.kernel.org/stable/c/b19c0465e4daad5aa8f60552ea0578cf31a11b1e
- https://git.kernel.org/stable/c/b9914db13ac15aca3b74544c0bb1a2e0dad1f174
- https://git.kernel.org/stable/c/d11aefe654a04fc41996d254748d6a38b6b0a7be
CWE Common Weakness Enumeration
Unknown
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