GHSA-243P-R44X-JH77
Vulnerability from github – Published: 2026-10-18 18:32 – Updated: 2026-10-18 18:32In 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": [],
"aliases": [
"CVE-2026-98860"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-10-18T16:17:40Z",
"severity": null
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nHID: bpf: cast size to ssize_t when checking hid_bpf_hw_request\n\nAs reported by Sashiko:\nIf a transport driver encounters a hardware error and returns a negative\nerror code such as -EPIPE, ret is implicitly promoted to size_t when\ncompared against size. This causes the negative error code to evaluate\nas a large positive number, making the (ret \u003e size) condition true.\n\nThis silently converts the hardware error into a success return value\nand copies the unmodified buffer back, which could leave BPF programs\noperating on uninitialized or stale data.\n\nFix this by casting size into ssize_t to return the actual negative\nerror code.",
"id": "GHSA-243p-r44x-jh77",
"modified": "2026-10-18T18:32:06Z",
"published": "2026-10-18T18:32:06Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98860"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/3afefbfe55c2a8a0c4bdf6f4cc1f773da120027c"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/8b85ef0f561039e249c3f883c5280a1449c6dbee"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/97be6396817bd3b11d06239010d27902940bfaa9"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/f9f808227554b2c116fd07dd2328ecd74ea3f411"
}
],
"schema_version": "1.4.0",
"severity": []
}
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