CVE-2022-49993
Vulnerability Scoring
Analysis In Progress
CVE-2022-49993 Vulnerability Analysis & Exploit Details
CVE-2022-49993
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-2022-49993 Details
Status: Awaiting Analysis
Published on: 18 Jun 2025, 11:15 UTC
CVSS Release:
CVE-2022-49993 Vulnerability Summary
CVE-2022-49993: In the Linux kernel, the following vulnerability has been resolved: loop: Check for overflow while configuring loop The userspace can configure a loop using an ioctl call, wherein a configuration of type loop_config is passed (see lo_ioctl()'s case on line 1550 of drivers/block/loop.c). This proceeds to call loop_configure() which in turn calls loop_set_status_from_info() (see line 1050 of loop.c), passing &config->info which is of type loop_info64*. This function then sets the appropriate values, like the offset. loop_device has lo_offset of type loff_t (see line 52 of loop.c), which is typdef-chained to long long, whereas loop_info64 has lo_offset of type __u64 (see line 56 of include/uapi/linux/loop.h). The function directly copies offset from info to the device as follows (See line 980 of loop.c): lo->lo_offset = info->lo_offset; This results in an overflow, which triggers a warning in iomap_iter() due to a call to iomap_iter_done() which has: WARN_ON_ONCE(iter->iomap.offset > iter->pos); Thus, check for negative value during loop_set_status_from_info(). Bug report: https://syzkaller.appspot.com/bug?id=c620fe14aac810396d3c3edc9ad73848bf69a29e
Assessing the Risk of CVE-2022-49993
Access Complexity Graph
The exploitability of CVE-2022-49993 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-2022-49993
No exploitability data is available for CVE-2022-49993.
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-2022-49993, 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-2022-49993, 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-2022-49993 does not compromise confidentiality.
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Integrity:
None
CVE-2022-49993 does not impact data integrity.
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Availability:
None
CVE-2022-49993 does not affect system availability.
CVE-2022-49993 References
External References
- https://git.kernel.org/stable/c/0455bef69028c65065f16bb04635591b2374249b
- https://git.kernel.org/stable/c/18e28817cb516b39de6281f6db9b0618b2cc7b42
- https://git.kernel.org/stable/c/6858933131d0dadac071c4d33335a9ea4b8e76cf
- https://git.kernel.org/stable/c/9be7fa7ead18a48940df7b59d993bbc8b9055c15
- https://git.kernel.org/stable/c/a217715338fd48f72114725aa7a40e484a781ca7
- https://git.kernel.org/stable/c/adf0112d9b8acb03485624220b4934f69bf13369
- https://git.kernel.org/stable/c/b40877b8562c5720d0a7fce20729f56b75a3dede
- https://git.kernel.org/stable/c/c490a0b5a4f36da3918181a8acdc6991d967c5f3
CWE Common Weakness Enumeration
Unknown
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