CVE-2025-40078
Vulnerability Scoring
Analysis In Progress
CVE-2025-40078 Vulnerability Analysis & Exploit Details
CVE-2025-40078
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-2025-40078 Details
Status: Awaiting Analysis
Last updated: 🕒 30 Oct 2025, 15:05 UTC
Originally published on: 🕛 28 Oct 2025, 12:15 UTC
Time between publication and last update: 2 days
CVSS Release:
CVE-2025-40078 Vulnerability Summary
CVE-2025-40078: In the Linux kernel, the following vulnerability has been resolved: bpf: Explicitly check accesses to bpf_sock_addr Syzkaller found a kernel warning on the following sock_addr program: 0: r0 = 0 1: r2 = *(u32 *)(r1 +60) 2: exit which triggers: verifier bug: error during ctx access conversion (0) This is happening because offset 60 in bpf_sock_addr corresponds to an implicit padding of 4 bytes, right after msg_src_ip4. Access to this padding isn't rejected in sock_addr_is_valid_access and it thus later fails to convert the access. This patch fixes it by explicitly checking the various fields of bpf_sock_addr in sock_addr_is_valid_access. I checked the other ctx structures and is_valid_access functions and didn't find any other similar cases. Other cases of (properly handled) padding are covered in new tests in a subsequent patch.
Assessing the Risk of CVE-2025-40078
Access Complexity Graph
The exploitability of CVE-2025-40078 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-2025-40078
No exploitability data is available for CVE-2025-40078.
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-2025-40078, 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-2025-40078, 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-2025-40078 does not compromise confidentiality.
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Integrity:
None
CVE-2025-40078 does not impact data integrity.
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Availability:
None
CVE-2025-40078 does not affect system availability.
CVE-2025-40078 References
External References
- https://git.kernel.org/stable/c/4f00858cd9bbbdf67159e28b85a8ca9e77c83622
- https://git.kernel.org/stable/c/6d8b1a21fd5c34622b0c3893c61e4a38d8ba53ec
- https://git.kernel.org/stable/c/6fabca2fc94d33cdf7ec102058983b086293395f
- https://git.kernel.org/stable/c/76e04bbb4296fb6eac084dbfc27e02ccc744db3e
- https://git.kernel.org/stable/c/ad8b4fe5617e3c85fc23267f02500c4f3bf0ff69
- https://git.kernel.org/stable/c/cdeafacb4f9ff261a96baef519e29480fd7b1019
- https://git.kernel.org/stable/c/de44cdc50d2dce8718cb57deddf9cf1be9a7759f
- https://git.kernel.org/stable/c/fe9d33f0470350558cb08cecb54cf2267b3a45d2
CWE Common Weakness Enumeration
Unknown
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