CVE-2023-54099
Vulnerability Scoring
Analysis In Progress
CVE-2023-54099 Vulnerability Analysis & Exploit Details
CVE-2023-54099
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-2023-54099 Details
Status: Received on 24 Dec 2025, 13:16 UTC
Published on: 24 Dec 2025, 13:16 UTC
CVSS Release:
CVE-2023-54099 Vulnerability Summary
CVE-2023-54099: In the Linux kernel, the following vulnerability has been resolved: fs: Protect reconfiguration of sb read-write from racing writes The reconfigure / remount code takes a lot of effort to protect filesystem's reconfiguration code from racing writes on remounting read-only. However during remounting read-only filesystem to read-write mode userspace writes can start immediately once we clear SB_RDONLY flag. This is inconvenient for example for ext4 because we need to do some writes to the filesystem (such as preparation of quota files) before we can take userspace writes so we are clearing SB_RDONLY flag before we are fully ready to accept userpace writes and syzbot has found a way to exploit this [1]. Also as far as I'm reading the code the filesystem remount code was protected from racing writes in the legacy mount path by the mount's MNT_READONLY flag so this is relatively new problem. It is actually fairly easy to protect remount read-write from racing writes using sb->s_readonly_remount flag so let's just do that instead of having to workaround these races in the filesystem code. [1] https://lore.kernel.org/all/00000000000006a0df05f6667499@google.com/T/
Assessing the Risk of CVE-2023-54099
Access Complexity Graph
The exploitability of CVE-2023-54099 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-2023-54099
No exploitability data is available for CVE-2023-54099.
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-2023-54099, 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-2023-54099, 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-2023-54099 does not compromise confidentiality.
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Integrity:
None
CVE-2023-54099 does not impact data integrity.
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Availability:
None
CVE-2023-54099 does not affect system availability.
CVE-2023-54099 References
External References
- https://git.kernel.org/stable/c/0336b42456e485fda1006b5b411e7372e20fbf03
- https://git.kernel.org/stable/c/0ccfe21949bc9f706a86ee7351b74375c0745757
- https://git.kernel.org/stable/c/295ef44a2abaf97d7a594b1d4c60d4be3738191f
- https://git.kernel.org/stable/c/4abda85197ba5d695e6040d580b4b409ce0d3733
- https://git.kernel.org/stable/c/7e4e87ec56aa6d008c64eab31b340a7c452b26cc
- https://git.kernel.org/stable/c/c541dce86c537714b6761a79a969c1623dfa222b
CWE Common Weakness Enumeration
Unknown
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