GHSA-PG5H-3PM6-795F
Vulnerability from github – Published: 2026-09-17 18:32 – Updated: 2026-09-17 18:32In the Linux kernel, the following vulnerability has been resolved:
usb: gadget: configfs: fix out-of-bounds read of qw_sign
os_desc_qw_sign_show() passes OS_STRING_QW_SIGN_LEN as the input length to utf16s_to_utf8s(), but that argument counts UTF-16 code units while OS_STRING_QW_SIGN_LEN (14) is the byte size of qw_sign[]. The array holds only OS_STRING_QW_SIGN_LEN / 2 (7) code units, so the conversion reads up to 7 units (14 bytes) past the end of qw_sign[] into the following members of struct gadget_info when the stored signature fills the array without a NUL terminator, exposing those bytes through the configfs attribute.
The store path halves the count for its input bound but passes the full byte count as the utf8s_to_utf16s() output limit; use the destination code-unit count in both directions.
{
"affected": [],
"aliases": [
"CVE-2026-93120"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-09-17T17:18:06Z",
"severity": null
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: gadget: configfs: fix out-of-bounds read of qw_sign\n\nos_desc_qw_sign_show() passes OS_STRING_QW_SIGN_LEN as the input\nlength to utf16s_to_utf8s(), but that argument counts UTF-16 code\nunits while OS_STRING_QW_SIGN_LEN (14) is the byte size of qw_sign[].\nThe array holds only OS_STRING_QW_SIGN_LEN / 2 (7) code units, so the\nconversion reads up to 7 units (14 bytes) past the end of qw_sign[]\ninto the following members of struct gadget_info when the stored\nsignature fills the array without a NUL terminator, exposing those\nbytes through the configfs attribute.\n\nThe store path halves the count for its input bound but passes the\nfull byte count as the utf8s_to_utf16s() output limit; use the\ndestination code-unit count in both directions.",
"id": "GHSA-pg5h-3pm6-795f",
"modified": "2026-09-17T18:32:11Z",
"published": "2026-09-17T18:32:11Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-93120"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/36315a330e067f7773196940552feacb1debbef1"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/7e94cb967778e074411940db4db97f22ed77560c"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/9b45125501aad2dff7730970461b455b0e0658ee"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/a28c486434634f6d1e120711d2b09f3eddea6c98"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/afbf39c0f2297c6abef6d670a82a2079b0836191"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/b895dbed8ac9e12a5ffa1a2165575a8469f8340d"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/f63edb54d8f738f9c21e2068c777ae1c097df6b7"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/f6da500b0f8106882598b6dec87fe37d653946cf"
}
],
"schema_version": "1.4.0",
"severity": []
}
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