CVE-2025-40219
Vulnerability Scoring
Analysis In Progress
CVE-2025-40219 Vulnerability Analysis & Exploit Details
CVE-2025-40219
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-2025-40219 Details
Status: Deferred
Last updated: 🕧 15 Apr 2026, 00:35 UTC
Originally published on: 🕒 04 Dec 2025, 15:15 UTC
Time between publication and last update: 131 days
CVSS Release:
CVE-2025-40219 Vulnerability Summary
CVE-2025-40219: In the Linux kernel, the following vulnerability has been resolved: PCI/IOV: Fix race between SR-IOV enable/disable and hotplug Commit 05703271c3cd ("PCI/IOV: Add PCI rescan-remove locking when enabling/disabling SR-IOV") tried to fix a race between the VF removal inside sriov_del_vfs() and concurrent hot unplug by taking the PCI rescan/remove lock in sriov_del_vfs(). Similarly the PCI rescan/remove lock was also taken in sriov_add_vfs() to protect addition of VFs. This approach however causes deadlock on trying to remove PFs with SR-IOV enabled because PFs disable SR-IOV during removal and this removal happens under the PCI rescan/remove lock. So the original fix had to be reverted. Instead of taking the PCI rescan/remove lock in sriov_add_vfs() and sriov_del_vfs(), fix the race that occurs with SR-IOV enable and disable vs hotplug higher up in the callchain by taking the lock in sriov_numvfs_store() before calling into the driver's sriov_configure() callback.
Assessing the Risk of CVE-2025-40219
Access Complexity Graph
The exploitability of CVE-2025-40219 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-2025-40219
No exploitability data is available for CVE-2025-40219.
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-2025-40219, 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-2025-40219, 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-2025-40219 does not compromise confidentiality.
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Integrity:
None
CVE-2025-40219 does not impact data integrity.
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Availability:
None
CVE-2025-40219 does not affect system availability.
CVE-2025-40219 References
External References
- https://git.kernel.org/stable/c/1047ca2d816994f31e1475e63e0c0b7825599747
- https://git.kernel.org/stable/c/3cddde484471c602bea04e6f384819d336a1ff84
- https://git.kernel.org/stable/c/7c37920c96b85ef4255a7acc795e99e63dd38d59
- https://git.kernel.org/stable/c/97c18f074ff1c12d016a0753072a3afdfa0b9611
- https://git.kernel.org/stable/c/a5338e365c4559d7b4d7356116b0eb95b12e08d5
- https://git.kernel.org/stable/c/bea1d373098b22d7142da48750ce5526096425bc
- https://git.kernel.org/stable/c/d7673ac466eca37ec3e6b7cc9ccdb06de3304e9b
- https://git.kernel.org/stable/c/f3015627b6e9ddf85cfeaf42405b3c194dde2c36
CWE Common Weakness Enumeration
Unknown
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