{"id":"CVE-2026-98860","state":"PUBLISHED","title":"HID: bpf: cast size to ssize_t when checking hid_bpf_hw_request","description":"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 > 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.","publishedAt":"2026-10-18T15:51:21.403Z","updatedAt":"2026-10-19T09:26:54.770Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"d6efaa50af62fb0790dd1fd4e7e5506b46312510","status":"affected","lessThan":"8b85ef0f561039e249c3f883c5280a1449c6dbee","versionType":"git"},{"version":"73c5b5aea1c443239c8cb4191b4af7a4bd6fd7b1","status":"affected","lessThan":"97be6396817bd3b11d06239010d27902940bfaa9","versionType":"git"},{"version":"2b658c1c442ec1cd9eec5ead98d68662c40fe645","status":"affected","lessThan":"f9f808227554b2c116fd07dd2328ecd74ea3f411","versionType":"git"},{"version":"2b658c1c442ec1cd9eec5ead98d68662c40fe645","status":"affected","lessThan":"3afefbfe55c2a8a0c4bdf6f4cc1f773da120027c","versionType":"git"},{"version":"eb57dae20fdf6f3069cdc07821fa3bb46de381d7","status":"affected","versionType":"git"},{"version":"6.12.78","status":"affected","lessThan":"6.12.113","versionType":"semver"},{"version":"6.18.20","status":"affected","lessThan":"6.18.56","versionType":"semver"},{"version":"6.19.10","status":"affected","lessThan":"6.20","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/hid/bpf/hid_bpf_dispatch.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"7.0","status":"affected"},{"version":"0","status":"unaffected","lessThan":"7.0","versionType":"semver"},{"version":"6.12.113","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.56","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.10","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/hid/bpf/hid_bpf_dispatch.c"]}],"references":["https://git.kernel.org/stable/c/8b85ef0f561039e249c3f883c5280a1449c6dbee","https://git.kernel.org/stable/c/97be6396817bd3b11d06239010d27902940bfaa9","https://git.kernel.org/stable/c/f9f808227554b2c116fd07dd2328ecd74ea3f411","https://git.kernel.org/stable/c/3afefbfe55c2a8a0c4bdf6f4cc1f773da120027c"],"weaknesses":[],"ingestedAt":"2026-10-29T20:13:43.249Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/98xxx/CVE-2026-98860.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-98860","state":"PUBLISHED","datePublished":"2026-10-18T15:51:21.403Z","dateUpdated":"2026-10-19T09:26:54.770Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-25T10:25:14.376Z"},"containers":{"cna":{"title":"HID: bpf: cast size to ssize_t when checking hid_bpf_hw_request","descriptions":[{"lang":"en","value":"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 > 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."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"d6efaa50af62fb0790dd1fd4e7e5506b46312510","status":"affected","lessThan":"8b85ef0f561039e249c3f883c5280a1449c6dbee","versionType":"git"},{"version":"73c5b5aea1c443239c8cb4191b4af7a4bd6fd7b1","status":"affected","lessThan":"97be6396817bd3b11d06239010d27902940bfaa9","versionType":"git"},{"version":"2b658c1c442ec1cd9eec5ead98d68662c40fe645","status":"affected","lessThan":"f9f808227554b2c116fd07dd2328ecd74ea3f411","versionType":"git"},{"version":"2b658c1c442ec1cd9eec5ead98d68662c40fe645","status":"affected","lessThan":"3afefbfe55c2a8a0c4bdf6f4cc1f773da120027c","versionType":"git"},{"version":"eb57dae20fdf6f3069cdc07821fa3bb46de381d7","status":"affected","versionType":"git"},{"version":"6.12.78","status":"affected","lessThan":"6.12.113","versionType":"semver"},{"version":"6.18.20","status":"affected","lessThan":"6.18.56","versionType":"semver"},{"version":"6.19.10","status":"affected","lessThan":"6.20","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/hid/bpf/hid_bpf_dispatch.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"7.0","status":"affected"},{"version":"0","status":"unaffected","lessThan":"7.0","versionType":"semver"},{"version":"6.12.113","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.56","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.10","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/hid/bpf/hid_bpf_dispatch.c"]}],"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"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-19T09:26:54.770Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.12.78","versionEndExcluding":"6.12.113"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.18.20","versionEndExcluding":"6.18.56"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"7.0","versionEndExcluding":"7.2.10"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"7.0","versionEndExcluding":"7.3"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.19.10"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}