CVE-2026-23103
Vulnerability Scoring
Analysis In Progress
CVE-2026-23103 Vulnerability Analysis & Exploit Details
CVE-2026-23103
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-2026-23103 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-2026-23103 Vulnerability Summary
CVE-2026-23103: In the Linux kernel, the following vulnerability has been resolved: ipvlan: Make the addrs_lock be per port Make the addrs_lock be per port, not per ipvlan dev. Initial code seems to be written in the assumption, that any address change must occur under RTNL. But it is not so for the case of IPv6. So 1) Introduce per-port addrs_lock. 2) It was needed to fix places where it was forgotten to take lock (ipvlan_open/ipvlan_close) This appears to be a very minor problem though. Since it's highly unlikely that ipvlan_add_addr() will be called on 2 CPU simultaneously. But nevertheless, this could cause: 1) False-negative of ipvlan_addr_busy(): one interface iterated through all port->ipvlans + ipvlan->addrs under some ipvlan spinlock, and another added IP under its own lock. Though this is only possible for IPv6, since looks like only ipvlan_addr6_event() can be called without rtnl_lock. 2) Race since ipvlan_ht_addr_add(port) is called under different ipvlan->addrs_lock locks This should not affect performance, since add/remove IP is a rare situation and spinlock is not taken on fast paths.
Assessing the Risk of CVE-2026-23103
Access Complexity Graph
The exploitability of CVE-2026-23103 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-2026-23103
No exploitability data is available for CVE-2026-23103.
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-2026-23103, 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-2026-23103, 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-2026-23103 does not compromise confidentiality.
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Integrity:
None
CVE-2026-23103 does not impact data integrity.
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Availability:
None
CVE-2026-23103 does not affect system availability.
CVE-2026-23103 References
External References
- https://git.kernel.org/stable/c/04ba6de6eff61238e5397c14ac26a6578c7735a5
- https://git.kernel.org/stable/c/1f300c10d92c547c3a7d978e1212ff52f18256ed
- https://git.kernel.org/stable/c/3c149b662cbb202a450e81f938e702ba333864ad
- https://git.kernel.org/stable/c/6a81e2db096913d7e43aada1c350c1282e76db39
- https://git.kernel.org/stable/c/70feb16e3fbfb10b15de1396557c38e99f1ab8df
- https://git.kernel.org/stable/c/88f83e6c9cdb46b8c8ddd0ba01393362963cf589
- https://git.kernel.org/stable/c/d3ba32162488283c0a4c5bedd8817aec91748802
CWE Common Weakness Enumeration
Unknown
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