HID: bpf: cast size to ssize_t when checking hid_bpf_hw_request
CVSS score
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EPSS probability
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Risk score
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Published
8 h ago
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Vulnerability description
CVE AI research
DayBreach AI Explanation
Verified against sourcesSources read
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Source agreement
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Evidence confidence
%55
Short explanation
A vulnerability exists within the HID bpf subsystem of the Linux kernel, leading to the misinterpretation of hardware errors. S0, S1
The evaluation of negative error codes as large positive numbers can cause BPF programs to operate on uninitialized or stale data. S0, S1
What should be done?
- Follow the vendor advisory for guidance S0
- Apply the recommended updates and patches S0, S1
Chain of evidence and sources
Negatif hata kodunun size_t türüne yükseltilmesi koşulun yanlış değerlendirilmesine neden olur. S0, S1
Sorun size değerinin ssize_t türüne dönüştürülmesiyle düzeltilmektedir. S0, S1
Show the technical text from the sources
In the Linux kernel, the following vulnerability has been resolved: HID: bpf: cast size to ssize_t when checking hid_bpf_hw_request As reported by Sashiko: If a transport driver encounters a hardware error and returns a negative error code such as -EPIPE, ret is implicitly promoted to size_t when compared against size. This causes the negative error code to evaluate as a large positive number, making the (ret > size) condition true. This silently converts the hardware error into a success return value and copies the unmodified buffer back, which could leave BPF programs operating on uninitialized or stale data. Fix this by casting size into ssize_t to return the actual negative error code.
Explanation produced with the local gemini-flash-lite-latest model. Numerical metrics and the KEV, patch and exploit statuses are not determined by AI.
IMPACT: Affected Products and Software
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SCORING: CVSS from Multiple Sources
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Patch and Remediation Guide
Solution & Remediation Advisory
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Public exploit and active exploitation status
Verified exploit intelligence
No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.
Weakness Classification and Attack Patterns (CWE & CAPEC)
CWE - Common Weakness Enumeration
While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-98860 is associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-98860 weaknesses.
Official Sources and Advisories
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