CVE-2022-50668
Vulnerability Scoring
Analysis In Progress
CVE-2022-50668 Vulnerability Analysis & Exploit Details
CVE-2022-50668
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-2022-50668 Details
Status: Awaiting Analysis
Published on: 09 Dec 2025, 16:17 UTC
CVSS Release:
CVE-2022-50668 Vulnerability Summary
CVE-2022-50668: In the Linux kernel, the following vulnerability has been resolved: ext4: fix deadlock due to mbcache entry corruption When manipulating xattr blocks, we can deadlock infinitely looping inside ext4_xattr_block_set() where we constantly keep finding xattr block for reuse in mbcache but we are unable to reuse it because its reference count is too big. This happens because cache entry for the xattr block is marked as reusable (e_reusable set) although its reference count is too big. When this inconsistency happens, this inconsistent state is kept indefinitely and so ext4_xattr_block_set() keeps retrying indefinitely. The inconsistent state is caused by non-atomic update of e_reusable bit. e_reusable is part of a bitfield and e_reusable update can race with update of e_referenced bit in the same bitfield resulting in loss of one of the updates. Fix the problem by using atomic bitops instead. This bug has been around for many years, but it became *much* easier to hit after commit 65f8b80053a1 ("ext4: fix race when reusing xattr blocks").
Assessing the Risk of CVE-2022-50668
Access Complexity Graph
The exploitability of CVE-2022-50668 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-2022-50668
No exploitability data is available for CVE-2022-50668.
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-2022-50668, 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-2022-50668, 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-2022-50668 does not compromise confidentiality.
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Integrity:
None
CVE-2022-50668 does not impact data integrity.
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Availability:
None
CVE-2022-50668 does not affect system availability.
CVE-2022-50668 References
External References
- https://git.kernel.org/stable/c/127b80cefb941a81255c72f11081123f3a705369
- https://git.kernel.org/stable/c/1be16a0c2f10186df505e28b0cc92d7f3366e2a8
- https://git.kernel.org/stable/c/5bc0b2fda4b47c86278f7c6d30c211f425bf51cf
- https://git.kernel.org/stable/c/a44e84a9b7764c72896f7241a0ec9ac7e7ef38dd
- https://git.kernel.org/stable/c/af53065276376750dfac35a7248af18806404c5d
- https://git.kernel.org/stable/c/cc1538c693d25e282bed8c54b65c914a04023a78
- https://git.kernel.org/stable/c/efaa0ca678f56d47316a08030b2515678cebbc50
CWE Common Weakness Enumeration
Unknown
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