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CVE-2026-98860

Unknown

Last modified

CVE-2026-98860 is a vulnerability of currently unknown severity. 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..

Description

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.

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= d6efaa50af62fb0790dd1fd4e7e5506b46312510, < 8b85ef0f561039e249c3f883c5280a1449c6dbee; >= 73c5b5aea1c443239c8cb4191b4af7a4bd6fd7b1, < 97be6396817bd3b11d06239010d27902940bfaa9; >= 2b658c1c442ec1cd9eec5ead98d68662c40fe645, < f9f808227554b2c116fd07dd2328ecd74ea3f411; >= 2b658c1c442ec1cd9eec5ead98d68662c40fe645, < 3afefbfe55c2a8a0c4bdf6f4cc1f773da120027c; eb57dae20fdf6f3069cdc07821fa3bb46de381d7; >= 6.12.78, < 6.12.113; >= 6.18.20, < 6.18.56; >= 6.19.10, < 6.20
LinuxLinux7.0

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-98860?
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.
How severe is CVE-2026-98860?
Severity scoring for CVE-2026-98860 is pending analysis.
How do I fix CVE-2026-98860?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST