CVE-2025-68771
Vulnerability Scoring
Analysis In Progress
CVE-2025-68771 Vulnerability Analysis & Exploit Details
CVE-2025-68771
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-2025-68771 Details
Status: Awaiting Analysis
Last updated: 🕐 19 Jan 2026, 13:16 UTC
Originally published on: 🕓 13 Jan 2026, 16:15 UTC
Time between publication and last update: 5 days
CVSS Release:
CVE-2025-68771 Vulnerability Summary
CVE-2025-68771: In the Linux kernel, the following vulnerability has been resolved: ocfs2: fix kernel BUG in ocfs2_find_victim_chain syzbot reported a kernel BUG in ocfs2_find_victim_chain() because the `cl_next_free_rec` field of the allocation chain list (next free slot in the chain list) is 0, triggring the BUG_ON(!cl->cl_next_free_rec) condition in ocfs2_find_victim_chain() and panicking the kernel. To fix this, an if condition is introduced in ocfs2_claim_suballoc_bits(), just before calling ocfs2_find_victim_chain(), the code block in it being executed when either of the following conditions is true: 1. `cl_next_free_rec` is equal to 0, indicating that there are no free chains in the allocation chain list 2. `cl_next_free_rec` is greater than `cl_count` (the total number of chains in the allocation chain list) Either of them being true is indicative of the fact that there are no chains left for usage. This is addressed using ocfs2_error(), which prints the error log for debugging purposes, rather than panicking the kernel.
Assessing the Risk of CVE-2025-68771
Access Complexity Graph
The exploitability of CVE-2025-68771 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-2025-68771
No exploitability data is available for CVE-2025-68771.
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-2025-68771, 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-2025-68771, 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-2025-68771 does not compromise confidentiality.
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Integrity:
None
CVE-2025-68771 does not impact data integrity.
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Availability:
None
CVE-2025-68771 does not affect system availability.
CVE-2025-68771 References
External References
- https://git.kernel.org/stable/c/039bef30e320827bac8990c9f29d2a68cd8adb5f
- https://git.kernel.org/stable/c/1f77e5cd563e6387fdf3bb714fcda36cd88ac5e7
- https://git.kernel.org/stable/c/7acc0390e0dd7474c4451d05465a677d55ad4268
- https://git.kernel.org/stable/c/96f1b074c98c20f55a3b23d2ab44d9fb0f619869
- https://git.kernel.org/stable/c/b08a33d5f80efe6979a6e8f905c1a898910c21dd
- https://git.kernel.org/stable/c/d0fd1f732ea8063cecd07a3879b7d815c7ee71ed
- https://git.kernel.org/stable/c/e24aedae71652d4119049f1fbef6532ccbe3966d
CWE Common Weakness Enumeration
Unknown
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