Description
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 products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
76180d716f91f035d9c8639497cf5459b44e1a51 to < b895dbed8ac9e12a5ffa1a2165575a8469f8340daffected76180d716f91f035d9c8639497cf5459b44e1a51 to < 9b45125501aad2dff7730970461b455b0e0658eeaffected76180d716f91f035d9c8639497cf5459b44e1a51 to < f6da500b0f8106882598b6dec87fe37d653946cfaffected76180d716f91f035d9c8639497cf5459b44e1a51 to < a28c486434634f6d1e120711d2b09f3eddea6c98affected76180d716f91f035d9c8639497cf5459b44e1a51 to < 7e94cb967778e074411940db4db97f22ed77560caffected76180d716f91f035d9c8639497cf5459b44e1a51 to < afbf39c0f2297c6abef6d670a82a2079b0836191affected76180d716f91f035d9c8639497cf5459b44e1a51 to < 36315a330e067f7773196940552feacb1debbef1affected76180d716f91f035d9c8639497cf5459b44e1a51 to < f63edb54d8f738f9c21e2068c777ae1c097df6b7affected
Linux Linux
Default version status: affected
4.13affected0 to < 4.13unaffected5.10.270 to ≤ 5.10.*unaffected5.15.221 to ≤ 5.15.*unaffected6.1.188 to ≤ 6.1.*unaffected6.6.157 to ≤ 6.6.*unaffected6.12.110 to ≤ 6.12.*unaffected6.18.52 to ≤ 6.18.*unaffected7.2.6 to ≤ 7.2.*unaffected7.3 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/b895dbed8ac9e12a5ffa1a2165575a8469f8340d ↗
- https://git.kernel.org/stable/c/9b45125501aad2dff7730970461b455b0e0658ee ↗
- https://git.kernel.org/stable/c/f6da500b0f8106882598b6dec87fe37d653946cf ↗
- https://git.kernel.org/stable/c/a28c486434634f6d1e120711d2b09f3eddea6c98 ↗
- https://git.kernel.org/stable/c/7e94cb967778e074411940db4db97f22ed77560c ↗
- https://git.kernel.org/stable/c/afbf39c0f2297c6abef6d670a82a2079b0836191 ↗
- https://git.kernel.org/stable/c/36315a330e067f7773196940552feacb1debbef1 ↗
- https://git.kernel.org/stable/c/f63edb54d8f738f9c21e2068c777ae1c097df6b7 ↗