CVE-2026-93120

Summary

In 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 Software

VendorProductVersion RangeStatus
LinuxLinux76180d716f91f035d9c8639497cf5459b44e1a51 < b895dbed8ac9e12a5ffa1a2165575a8469f8340daffected
LinuxLinux76180d716f91f035d9c8639497cf5459b44e1a51 < 9b45125501aad2dff7730970461b455b0e0658eeaffected
LinuxLinux76180d716f91f035d9c8639497cf5459b44e1a51 < f6da500b0f8106882598b6dec87fe37d653946cfaffected
LinuxLinux76180d716f91f035d9c8639497cf5459b44e1a51 < a28c486434634f6d1e120711d2b09f3eddea6c98affected
LinuxLinux76180d716f91f035d9c8639497cf5459b44e1a51 < 7e94cb967778e074411940db4db97f22ed77560caffected
LinuxLinux76180d716f91f035d9c8639497cf5459b44e1a51 < afbf39c0f2297c6abef6d670a82a2079b0836191affected
LinuxLinux76180d716f91f035d9c8639497cf5459b44e1a51 < 36315a330e067f7773196940552feacb1debbef1affected
LinuxLinux76180d716f91f035d9c8639497cf5459b44e1a51 < f63edb54d8f738f9c21e2068c777ae1c097df6b7affected
LinuxLinux4.13affected
LinuxLinux0 < 4.13unaffected
LinuxLinux5.10.270 <= 5.10.*unaffected
LinuxLinux5.15.221 <= 5.15.*unaffected
LinuxLinux6.1.188 <= 6.1.*unaffected
LinuxLinux6.6.157 <= 6.6.*unaffected
LinuxLinux6.12.110 <= 6.12.*unaffected
LinuxLinux6.18.52 <= 6.18.*unaffected
LinuxLinux7.2.6 <= 7.2.*unaffected
LinuxLinux7.3-rc1 <= *unaffected

Weaknesses

References