CVE-2026-93120 (GCVE-0-2026-93120)

Vulnerability from cvelistv5 – Published: 2026-09-17 16:11 – Updated: 2026-09-17 16:11
VLAI
Title
usb: gadget: configfs: fix out-of-bounds read of qw_sign
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.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 76180d716f91f035d9c8639497cf5459b44e1a51 , < b895dbed8ac9e12a5ffa1a2165575a8469f8340d (git)
Affected: 76180d716f91f035d9c8639497cf5459b44e1a51 , < 9b45125501aad2dff7730970461b455b0e0658ee (git)
Affected: 76180d716f91f035d9c8639497cf5459b44e1a51 , < f6da500b0f8106882598b6dec87fe37d653946cf (git)
Affected: 76180d716f91f035d9c8639497cf5459b44e1a51 , < a28c486434634f6d1e120711d2b09f3eddea6c98 (git)
Affected: 76180d716f91f035d9c8639497cf5459b44e1a51 , < 7e94cb967778e074411940db4db97f22ed77560c (git)
Affected: 76180d716f91f035d9c8639497cf5459b44e1a51 , < afbf39c0f2297c6abef6d670a82a2079b0836191 (git)
Affected: 76180d716f91f035d9c8639497cf5459b44e1a51 , < 36315a330e067f7773196940552feacb1debbef1 (git)
Affected: 76180d716f91f035d9c8639497cf5459b44e1a51 , < f63edb54d8f738f9c21e2068c777ae1c097df6b7 (git)
Create a notification for this product.
Linux Linux Affected: 4.13
Unaffected: 0 , < 4.13 (semver)
Unaffected: 5.10.270 , ≤ 5.10.* (semver)
Unaffected: 5.15.221 , ≤ 5.15.* (semver)
Unaffected: 6.1.188 , ≤ 6.1.* (semver)
Unaffected: 6.6.157 , ≤ 6.6.* (semver)
Unaffected: 6.12.110 , ≤ 6.12.* (semver)
Unaffected: 6.18.52 , ≤ 6.18.* (semver)
Unaffected: 7.2.6 , ≤ 7.2.* (semver)
Unaffected: 7.3-rc1 , ≤ * (original_commit_for_fix)
Create a notification for this product.
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          "value": "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."
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    "dateReserved": "2026-09-17T16:02:15.086Z",
    "dateUpdated": "2026-09-17T16:11:26.548Z",
    "state": "PUBLISHED"
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            "value": "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."
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    }
  }
}



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Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.