usb: gadget: configfs: fix out-of-bounds read of qw_sign
Summary
| CVE | CVE-2026-93120 |
|---|---|
| State | PUBLISHED |
| Assigner | Linux |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-09-17 17:18:06 UTC |
| Updated | 2026-09-17 17:18:06 UTC |
| 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. |
Risk And Classification
EPSS: 0.002100000 probability, percentile 0.115970000 (date 2026-09-18)
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Linux | Linux | affected 76180d716f91f035d9c8639497cf5459b44e1a51 b895dbed8ac9e12a5ffa1a2165575a8469f8340d git | Not specified |
| CNA | Linux | Linux | affected 76180d716f91f035d9c8639497cf5459b44e1a51 9b45125501aad2dff7730970461b455b0e0658ee git | Not specified |
| CNA | Linux | Linux | affected 76180d716f91f035d9c8639497cf5459b44e1a51 f6da500b0f8106882598b6dec87fe37d653946cf git | Not specified |
| CNA | Linux | Linux | affected 76180d716f91f035d9c8639497cf5459b44e1a51 a28c486434634f6d1e120711d2b09f3eddea6c98 git | Not specified |
| CNA | Linux | Linux | affected 76180d716f91f035d9c8639497cf5459b44e1a51 7e94cb967778e074411940db4db97f22ed77560c git | Not specified |
| CNA | Linux | Linux | affected 76180d716f91f035d9c8639497cf5459b44e1a51 afbf39c0f2297c6abef6d670a82a2079b0836191 git | Not specified |
| CNA | Linux | Linux | affected 76180d716f91f035d9c8639497cf5459b44e1a51 36315a330e067f7773196940552feacb1debbef1 git | Not specified |
| CNA | Linux | Linux | affected 76180d716f91f035d9c8639497cf5459b44e1a51 f63edb54d8f738f9c21e2068c777ae1c097df6b7 git | Not specified |
| CNA | Linux | Linux | affected 4.13 | Not specified |
| CNA | Linux | Linux | unaffected 4.13 semver | Not specified |
| CNA | Linux | Linux | unaffected 5.10.270 5.10.* semver | Not specified |
| CNA | Linux | Linux | unaffected 5.15.221 5.15.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.1.188 6.1.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.6.157 6.6.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.12.110 6.12.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.18.52 6.18.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.2.6 7.2.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.3-rc1 * original_commit_for_fix | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| git.kernel.org/stable/c/afbf39c0f2297c6abef6d670a82a2079b0836191 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/f6da500b0f8106882598b6dec87fe37d653946cf | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/7e94cb967778e074411940db4db97f22ed77560c | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/36315a330e067f7773196940552feacb1debbef1 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/9b45125501aad2dff7730970461b455b0e0658ee | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/f63edb54d8f738f9c21e2068c777ae1c097df6b7 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/b895dbed8ac9e12a5ffa1a2165575a8469f8340d | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/a28c486434634f6d1e120711d2b09f3eddea6c98 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.