CVE-2026-23085
Vulnerability Scoring
Analysis In Progress
CVE-2026-23085 Vulnerability Analysis & Exploit Details
CVE-2026-23085
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-2026-23085 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-2026-23085 Vulnerability Summary
CVE-2026-23085: In the Linux kernel, the following vulnerability has been resolved: irqchip/gic-v3-its: Avoid truncating memory addresses On 32-bit machines with CONFIG_ARM_LPAE, it is possible for lowmem allocations to be backed by addresses physical memory above the 32-bit address limit, as found while experimenting with larger VMSPLIT configurations. This caused the qemu virt model to crash in the GICv3 driver, which allocates the 'itt' object using GFP_KERNEL. Since all memory below the 4GB physical address limit is in ZONE_DMA in this configuration, kmalloc() defaults to higher addresses for ZONE_NORMAL, and the ITS driver stores the physical address in a 32-bit 'unsigned long' variable. Change the itt_addr variable to the correct phys_addr_t type instead, along with all other variables in this driver that hold a physical address. The gicv5 driver correctly uses u64 variables, while all other irqchip drivers don't call virt_to_phys or similar interfaces. It's expected that other device drivers have similar issues, but fixing this one is sufficient for booting a virtio based guest.
Assessing the Risk of CVE-2026-23085
Access Complexity Graph
The exploitability of CVE-2026-23085 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-2026-23085
No exploitability data is available for CVE-2026-23085.
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-2026-23085, 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-2026-23085, 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-2026-23085 does not compromise confidentiality.
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Integrity:
None
CVE-2026-23085 does not impact data integrity.
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Availability:
None
CVE-2026-23085 does not affect system availability.
CVE-2026-23085 References
External References
- https://git.kernel.org/stable/c/03faa61eb4b9ca9aa09bd91d4c3773d8e7b1ac98
- https://git.kernel.org/stable/c/084ba3b99f2dfd991ce7e84fb17117319ec3cd9f
- https://git.kernel.org/stable/c/1b323391560354d8c515de8658b057a1daa82adb
- https://git.kernel.org/stable/c/85215d633983233809f7d4dad163b953331b8238
- https://git.kernel.org/stable/c/8d76a7d89c12d08382b66e2f21f20d0627d14859
- https://git.kernel.org/stable/c/e2f9c751f73a2d5bb62d94ab030aec118a811f27
- https://git.kernel.org/stable/c/e332b3b69e5b3acf07204a4b185071bab15c2b88
CWE Common Weakness Enumeration
Unknown
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