{"id":"CVE-2026-98860","title":"HID: bpf: cast size to ssize_t when checking hid_bpf_hw_request","summary":"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 …","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= d6efaa50af62fb0790dd1fd4e7e5506b46312510 < 8b85ef0f561039e249c3f883c5280a1449c6dbee","Linux >= 73c5b5aea1c443239c8cb4191b4af7a4bd6fd7b1 < 97be6396817bd3b11d06239010d27902940bfaa9","Linux >= 2b658c1c442ec1cd9eec5ead98d68662c40fe645 < f9f808227554b2c116fd07dd2328ecd74ea3f411","Linux >= 2b658c1c442ec1cd9eec5ead98d68662c40fe645 < 3afefbfe55c2a8a0c4bdf6f4cc1f773da120027c","Linux eb57dae20fdf6f3069cdc07821fa3bb46de381d7","Linux >= 6.12.78 < 6.12.113","Linux >= 6.18.20 < 6.18.56","Linux >= 6.19.10 < 6.20","Linux 7.0"],"published":"2026-10-18","updated":"2026-10-18","sourceUpdated":"2026-10-18T15:51:21.403Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-98860","references":[{"url":"https://git.kernel.org/stable/c/8b85ef0f561039e249c3f883c5280a1449c6dbee"},{"url":"https://git.kernel.org/stable/c/97be6396817bd3b11d06239010d27902940bfaa9"},{"url":"https://git.kernel.org/stable/c/f9f808227554b2c116fd07dd2328ecd74ea3f411"},{"url":"https://git.kernel.org/stable/c/3afefbfe55c2a8a0c4bdf6f4cc1f773da120027c"}],"tags":["cve.org"],"ingestedAt":"2026-10-18T16:47:32.459Z","slug":"CVE-2026-98860","body":"## Overview\n\nIn 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 > 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.\n\n## Affected\n\n- `Linux >= d6efaa50af62fb0790dd1fd4e7e5506b46312510 < 8b85ef0f561039e249c3f883c5280a1449c6dbee`\n- `Linux >= 73c5b5aea1c443239c8cb4191b4af7a4bd6fd7b1 < 97be6396817bd3b11d06239010d27902940bfaa9`\n- `Linux >= 2b658c1c442ec1cd9eec5ead98d68662c40fe645 < f9f808227554b2c116fd07dd2328ecd74ea3f411`\n- `Linux >= 2b658c1c442ec1cd9eec5ead98d68662c40fe645 < 3afefbfe55c2a8a0c4bdf6f4cc1f773da120027c`\n- `Linux eb57dae20fdf6f3069cdc07821fa3bb46de381d7`\n- `Linux >= 6.12.78 < 6.12.113`\n- `Linux >= 6.18.20 < 6.18.56`\n- `Linux >= 6.19.10 < 6.20`\n- `Linux 7.0`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}