CVE-2023-53446
Vulnerability Scoring
Analysis In Progress
CVE-2023-53446 Vulnerability Analysis & Exploit Details
CVE-2023-53446
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-2023-53446 Details
Status: Received on 18 Sep 2025, 16:15 UTC
Published on: 18 Sep 2025, 16:15 UTC
CVSS Release:
CVE-2023-53446 Vulnerability Summary
CVE-2023-53446: In the Linux kernel, the following vulnerability has been resolved: PCI/ASPM: Disable ASPM on MFD function removal to avoid use-after-free Struct pcie_link_state->downstream is a pointer to the pci_dev of function 0. Previously we retained that pointer when removing function 0, and subsequent ASPM policy changes dereferenced it, resulting in a use-after-free warning from KASAN, e.g.: # echo 1 > /sys/bus/pci/devices/0000:03:00.0/remove # echo powersave > /sys/module/pcie_aspm/parameters/policy BUG: KASAN: slab-use-after-free in pcie_config_aspm_link+0x42d/0x500 Call Trace: kasan_report+0xae/0xe0 pcie_config_aspm_link+0x42d/0x500 pcie_aspm_set_policy+0x8e/0x1a0 param_attr_store+0x162/0x2c0 module_attr_store+0x3e/0x80 PCIe spec r6.0, sec 7.5.3.7, recommends that software program the same ASPM Control value in all functions of multi-function devices. Disable ASPM and free the pcie_link_state when any child function is removed so we can discard the dangling pcie_link_state->downstream pointer and maintain the same ASPM Control configuration for all functions. [bhelgaas: commit log and comment]
Assessing the Risk of CVE-2023-53446
Access Complexity Graph
The exploitability of CVE-2023-53446 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-2023-53446
No exploitability data is available for CVE-2023-53446.
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-2023-53446, 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-2023-53446, 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-2023-53446 does not compromise confidentiality.
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Integrity:
None
CVE-2023-53446 does not impact data integrity.
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Availability:
None
CVE-2023-53446 does not affect system availability.
CVE-2023-53446 References
External References
- https://git.kernel.org/stable/c/4203722d51afe3d239e03f15cc73efdf023a7103
- https://git.kernel.org/stable/c/456d8aa37d0f56fc9e985e812496e861dcd6f2f2
- https://git.kernel.org/stable/c/666e7f9d60cee23077ea3e6331f6f8a19f7ea03f
- https://git.kernel.org/stable/c/7aecdd47910c51707696e8b0e045b9f88bd4230f
- https://git.kernel.org/stable/c/7badf4d6f49a358a01ab072bbff88d3ee886c33b
- https://git.kernel.org/stable/c/9856c0de49052174ab474113f4ba40c02aaee086
- https://git.kernel.org/stable/c/d51d2eeae4ce54d542909c4d9d07bf371a78592c
CWE Common Weakness Enumeration
Unknown
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