CVE-2023-53840 (GCVE-0-2023-53840)

Vulnerability from cvelistv5 – Published: 2025-12-09 01:29 – Updated: 2025-12-09 01:29
VLAI?
Summary
In the Linux kernel, the following vulnerability has been resolved: usb: early: xhci-dbc: Fix a potential out-of-bound memory access If xdbc_bulk_write() fails, the values in 'buf' can be anything. So the string is not guaranteed to be NULL terminated when xdbc_trace() is called. Reserve an extra byte, which will be zeroed automatically because 'buf' is a static variable, in order to avoid troubles, should it happen.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: aeb9dd1de98c1a5f2007ea5d2a154c1244caf8a0 , < e8fb0f13e45cf361fd06593d3cb2d89915cd3bd0 (git)
Affected: aeb9dd1de98c1a5f2007ea5d2a154c1244caf8a0 , < 351c8d8650d1ccc006255fa01f98b6c6496a02e5 (git)
Affected: aeb9dd1de98c1a5f2007ea5d2a154c1244caf8a0 , < df7c8aba7309f4dc55df94e06b67f576c0f52406 (git)
Affected: aeb9dd1de98c1a5f2007ea5d2a154c1244caf8a0 , < a4a97ab3db5c081eb6e7dba91306adefb461e0bd (git)
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    Linux Linux Affected: 4.12
Unaffected: 0 , < 4.12 (semver)
Unaffected: 5.15.99 , ≤ 5.15.* (semver)
Unaffected: 6.1.16 , ≤ 6.1.* (semver)
Unaffected: 6.2.3 , ≤ 6.2.* (semver)
Unaffected: 6.3 , ≤ * (original_commit_for_fix)
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{
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          "programFiles": [
            "drivers/usb/early/xhci-dbc.c"
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: early: xhci-dbc: Fix a potential out-of-bound memory access\n\nIf xdbc_bulk_write() fails, the values in \u0027buf\u0027 can be anything. So the\nstring is not guaranteed to be NULL terminated when xdbc_trace() is called.\n\nReserve an extra byte, which will be zeroed automatically because \u0027buf\u0027 is\na static variable, in order to avoid troubles, should it happen."
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        "dateUpdated": "2025-12-09T01:29:56.848Z",
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        "shortName": "Linux"
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      "title": "usb: early: xhci-dbc: Fix a potential out-of-bound memory access",
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    "datePublished": "2025-12-09T01:29:56.848Z",
    "dateReserved": "2025-12-09T01:27:17.826Z",
    "dateUpdated": "2025-12-09T01:29:56.848Z",
    "state": "PUBLISHED"
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  }
}


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Sightings

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  • 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.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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