GHSA-M8PJ-R7FV-796Q
Vulnerability from github – Published: 2026-09-17 18:31 – Updated: 2026-09-17 18:31In the Linux kernel, the following vulnerability has been resolved:
HID: haptic: don't write an uninitialized value to unhandled usages
fill_effect_buf() initializes value only for the four haptic usages handled by its switch, but writes it to field->value[] for every usage. An unhandled usage can therefore receive either an uninitialized value or one left over from the previous usage. hid_output_report() then serializes that value into the effect's report buffer.
Skip unhandled usages instead. This also matches switch_mode(), which only updates fields it recognizes.
Found with Clang's -Wconditional-uninitialized.
{
"affected": [],
"aliases": [
"CVE-2026-90197"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-09-17T17:17:14Z",
"severity": null
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nHID: haptic: don\u0027t write an uninitialized value to unhandled usages\n\nfill_effect_buf() initializes value only for the four haptic usages\nhandled by its switch, but writes it to field-\u003evalue[] for every usage.\nAn unhandled usage can therefore receive either an uninitialized value\nor one left over from the previous usage. hid_output_report() then\nserializes that value into the effect\u0027s report buffer.\n\nSkip unhandled usages instead. This also matches switch_mode(), which\nonly updates fields it recognizes.\n\nFound with Clang\u0027s -Wconditional-uninitialized.",
"id": "GHSA-m8pj-r7fv-796q",
"modified": "2026-09-17T18:31:55Z",
"published": "2026-09-17T18:31:55Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-90197"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/2d92c250815cba6bffd64f0125fac7afe4fa6ce0"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/324cc98b71f0d3dee7367ef3c669fd80747e71b6"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/3efb7f6491526f5012f9ec94769e9ed832feeef8"
}
],
"schema_version": "1.4.0",
"severity": []
}
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