CVE-2025-40263
Vulnerability Scoring
Analysis In Progress
CVE-2025-40263 Vulnerability Analysis & Exploit Details
CVE-2025-40263
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-2025-40263 Details
Status: Awaiting Analysis
Last updated: 🕙 06 Dec 2025, 22:15 UTC
Originally published on: 🕓 04 Dec 2025, 16:16 UTC
Time between publication and last update: 2 days
CVSS Release:
CVE-2025-40263 Vulnerability Summary
CVE-2025-40263: In the Linux kernel, the following vulnerability has been resolved: Input: cros_ec_keyb - fix an invalid memory access If cros_ec_keyb_register_matrix() isn't called (due to `buttons_switches_only`) in cros_ec_keyb_probe(), `ckdev->idev` remains NULL. An invalid memory access is observed in cros_ec_keyb_process() when receiving an EC_MKBP_EVENT_KEY_MATRIX event in cros_ec_keyb_work() in such case. Unable to handle kernel read from unreadable memory at virtual address 0000000000000028 ... x3 : 0000000000000000 x2 : 0000000000000000 x1 : 0000000000000000 x0 : 0000000000000000 Call trace: input_event cros_ec_keyb_work blocking_notifier_call_chain ec_irq_thread It's still unknown about why the kernel receives such malformed event, in any cases, the kernel shouldn't access `ckdev->idev` and friends if the driver doesn't intend to initialize them.
Assessing the Risk of CVE-2025-40263
Access Complexity Graph
The exploitability of CVE-2025-40263 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-2025-40263
No exploitability data is available for CVE-2025-40263.
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-2025-40263, 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-2025-40263, 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-2025-40263 does not compromise confidentiality.
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Integrity:
None
CVE-2025-40263 does not impact data integrity.
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Availability:
None
CVE-2025-40263 does not affect system availability.
CVE-2025-40263 References
External References
- https://git.kernel.org/stable/c/2d251c15c27e2dd16d6318425d2f7260cbd47d39
- https://git.kernel.org/stable/c/6d81068685154535af06163eb585d6d9663ec7ec
- https://git.kernel.org/stable/c/729d21c82c1b0504ffccb17cc261bf32e024fd0f
- https://git.kernel.org/stable/c/7bfd959187f2c7584bb43280bbc7b2846e7a5085
- https://git.kernel.org/stable/c/8b5ae1521660c16fa830ff17d16e650b4905b71a
- https://git.kernel.org/stable/c/9cf59f4724a9ee06ebb06c76b8678ac322e850b7
- https://git.kernel.org/stable/c/d74864291cb8bd784d44d1d02e87109cf88666bb
- https://git.kernel.org/stable/c/e08969c4d65ac31297fcb4d31d4808c789152f68
CWE Common Weakness Enumeration
Unknown
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