CVE-2026-23056
Vulnerability Scoring
Analysis In Progress
CVE-2026-23056 Vulnerability Analysis & Exploit Details
CVE-2026-23056
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-2026-23056 Details
Status: Awaiting Analysis
Last updated: 🕔 06 Feb 2026, 17:16 UTC
Originally published on: 🕔 04 Feb 2026, 17:16 UTC
Time between publication and last update: 2 days
CVSS Release:
CVE-2026-23056 Vulnerability Summary
CVE-2026-23056: In the Linux kernel, the following vulnerability has been resolved: uacce: implement mremap in uacce_vm_ops to return -EPERM The current uacce_vm_ops does not support the mremap operation of vm_operations_struct. Implement .mremap to return -EPERM to remind users. The reason we need to explicitly disable mremap is that when the driver does not implement .mremap, it uses the default mremap method. This could lead to a risk scenario: An application might first mmap address p1, then mremap to p2, followed by munmap(p1), and finally munmap(p2). Since the default mremap copies the original vma's vm_private_data (i.e., q) to the new vma, both munmap operations would trigger vma_close, causing q->qfr to be freed twice(qfr will be set to null here, so repeated release is ok).
Assessing the Risk of CVE-2026-23056
Access Complexity Graph
The exploitability of CVE-2026-23056 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-2026-23056
No exploitability data is available for CVE-2026-23056.
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-2026-23056, 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-2026-23056, 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-2026-23056 does not compromise confidentiality.
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Integrity:
None
CVE-2026-23056 does not impact data integrity.
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Availability:
None
CVE-2026-23056 does not affect system availability.
CVE-2026-23056 References
External References
- https://git.kernel.org/stable/c/02695347be532b628f22488300d40c4eba48b9b7
- https://git.kernel.org/stable/c/4c042bc71474dbe417c268f4bfb8ec196f802f07
- https://git.kernel.org/stable/c/75b29bdc935ff93b8e8bf6f6b4d8a4810b26e06f
- https://git.kernel.org/stable/c/78d99f062d42e3af2ca46bde1a8e46e0dfd372e3
- https://git.kernel.org/stable/c/a407ddd61b3e6afc5ccfcd1478797171cf5686ee
- https://git.kernel.org/stable/c/ba29b59d124e725e0377f09b2044909c91d657a1
- https://git.kernel.org/stable/c/ebfa85658a39b49ec3901ceea7535b73aa0429e6
CWE Common Weakness Enumeration
Unknown
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