CVE-2023-53847 (GCVE-0-2023-53847)

Vulnerability from cvelistv5 – Published: 2025-12-09 01:30 – Updated: 2026-05-11 19:52
VLAI
Title
usb-storage: alauda: Fix uninit-value in alauda_check_media()
Summary
In the Linux kernel, the following vulnerability has been resolved: usb-storage: alauda: Fix uninit-value in alauda_check_media() Syzbot got KMSAN to complain about access to an uninitialized value in the alauda subdriver of usb-storage: BUG: KMSAN: uninit-value in alauda_transport+0x462/0x57f0 drivers/usb/storage/alauda.c:1137 CPU: 0 PID: 12279 Comm: usb-storage Not tainted 5.3.0-rc7+ #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x191/0x1f0 lib/dump_stack.c:113 kmsan_report+0x13a/0x2b0 mm/kmsan/kmsan_report.c:108 __msan_warning+0x73/0xe0 mm/kmsan/kmsan_instr.c:250 alauda_check_media+0x344/0x3310 drivers/usb/storage/alauda.c:460 The problem is that alauda_check_media() doesn't verify that its USB transfer succeeded before trying to use the received data. What should happen if the transfer fails isn't entirely clear, but a reasonably conservative approach is to pretend that no media is present. A similar problem exists in a usb_stor_dbg() call in alauda_get_media_status(). In this case, when an error occurs the call is redundant, because usb_stor_ctrl_transfer() already will print a debugging message. Finally, unrelated to the uninitialized memory access, is the fact that alauda_check_media() performs DMA to a buffer on the stack. Fortunately usb-storage provides a general purpose DMA-able buffer for uses like this. We'll use it instead.
Severity
No CVSS data available.
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 6641 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: e80b0fade09ef1ee67b0898d480d4c588f124d5f , < 153c3e85873cc3e2f387169783c3a227bad9a95a (git)
Affected: e80b0fade09ef1ee67b0898d480d4c588f124d5f , < 49d380bcd6cba987c6085fae6464c9c087e8d9a0 (git)
Affected: e80b0fade09ef1ee67b0898d480d4c588f124d5f , < 044f4446e06bb03c52216697b14867ebc555ad3b (git)
Affected: e80b0fade09ef1ee67b0898d480d4c588f124d5f , < fe7c3a445d22783d27fe8bd0521a8aab1eb9da65 (git)
Affected: e80b0fade09ef1ee67b0898d480d4c588f124d5f , < 7a11d1e2625bdb2346f6586773b20b20977278ac (git)
Affected: e80b0fade09ef1ee67b0898d480d4c588f124d5f , < 0d2d5282d39aed6f27dfe1ed60a5f3934ebd21cd (git)
Affected: e80b0fade09ef1ee67b0898d480d4c588f124d5f , < 373e0ab8c4c516561493f1acf367c7ee7dc053c2 (git)
Affected: e80b0fade09ef1ee67b0898d480d4c588f124d5f , < a6ff6e7a9dd69364547751db0f626a10a6d628d2 (git)
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Linux Linux Affected: 2.6.16
Unaffected: 0 , < 2.6.16 (semver)
Unaffected: 4.14.323 , ≤ 4.14.* (semver)
Unaffected: 4.19.292 , ≤ 4.19.* (semver)
Unaffected: 5.4.254 , ≤ 5.4.* (semver)
Unaffected: 5.10.191 , ≤ 5.10.* (semver)
Unaffected: 5.15.127 , ≤ 5.15.* (semver)
Unaffected: 6.1.46 , ≤ 6.1.* (semver)
Unaffected: 6.4.11 , ≤ 6.4.* (semver)
Unaffected: 6.5 , ≤ * (original_commit_for_fix)
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb-storage: alauda: Fix uninit-value in alauda_check_media()\n\nSyzbot got KMSAN to complain about access to an uninitialized value in\nthe alauda subdriver of usb-storage:\n\nBUG: KMSAN: uninit-value in alauda_transport+0x462/0x57f0\ndrivers/usb/storage/alauda.c:1137\nCPU: 0 PID: 12279 Comm: usb-storage Not tainted 5.3.0-rc7+ #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS\nGoogle 01/01/2011\nCall Trace:\n  __dump_stack lib/dump_stack.c:77 [inline]\n  dump_stack+0x191/0x1f0 lib/dump_stack.c:113\n  kmsan_report+0x13a/0x2b0 mm/kmsan/kmsan_report.c:108\n  __msan_warning+0x73/0xe0 mm/kmsan/kmsan_instr.c:250\n  alauda_check_media+0x344/0x3310 drivers/usb/storage/alauda.c:460\n\nThe problem is that alauda_check_media() doesn\u0027t verify that its USB\ntransfer succeeded before trying to use the received data.  What\nshould happen if the transfer fails isn\u0027t entirely clear, but a\nreasonably conservative approach is to pretend that no media is\npresent.\n\nA similar problem exists in a usb_stor_dbg() call in\nalauda_get_media_status().  In this case, when an error occurs the\ncall is redundant, because usb_stor_ctrl_transfer() already will print\na debugging message.\n\nFinally, unrelated to the uninitialized memory access, is the fact\nthat alauda_check_media() performs DMA to a buffer on the stack.\nFortunately usb-storage provides a general purpose DMA-able buffer for\nuses like this.  We\u0027ll use it instead."
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          "url": "https://git.kernel.org/stable/c/a6ff6e7a9dd69364547751db0f626a10a6d628d2"
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          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb-storage: alauda: Fix uninit-value in alauda_check_media()\n\nSyzbot got KMSAN to complain about access to an uninitialized value in\nthe alauda subdriver of usb-storage:\n\nBUG: KMSAN: uninit-value in alauda_transport+0x462/0x57f0\ndrivers/usb/storage/alauda.c:1137\nCPU: 0 PID: 12279 Comm: usb-storage Not tainted 5.3.0-rc7+ #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS\nGoogle 01/01/2011\nCall Trace:\n  __dump_stack lib/dump_stack.c:77 [inline]\n  dump_stack+0x191/0x1f0 lib/dump_stack.c:113\n  kmsan_report+0x13a/0x2b0 mm/kmsan/kmsan_report.c:108\n  __msan_warning+0x73/0xe0 mm/kmsan/kmsan_instr.c:250\n  alauda_check_media+0x344/0x3310 drivers/usb/storage/alauda.c:460\n\nThe problem is that alauda_check_media() doesn\u0027t verify that its USB\ntransfer succeeded before trying to use the received data.  What\nshould happen if the transfer fails isn\u0027t entirely clear, but a\nreasonably conservative approach is to pretend that no media is\npresent.\n\nA similar problem exists in a usb_stor_dbg() call in\nalauda_get_media_status().  In this case, when an error occurs the\ncall is redundant, because usb_stor_ctrl_transfer() already will print\na debugging message.\n\nFinally, unrelated to the uninitialized memory access, is the fact\nthat alauda_check_media() performs DMA to a buffer on the stack.\nFortunately usb-storage provides a general purpose DMA-able buffer for\nuses like this.  We\u0027ll use it instead."
          }
        ],
        "id": "CVE-2023-53847",
        "lastModified": "2026-06-17T06:46:10.597",
        "metrics": {},
        "published": "2025-12-09T16:17:25.137",
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          }
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        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Deferred"
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    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2026-11-07T10:51:37+00:00",
      "cve": "CVE-2023-53847",
      "id": "CVE-2023-53847",
      "initial_release_date": "2023-01-01T00:00:00+00:00",
      "product_status:fixed": "461",
      "product_status:known_affected": "80",
      "product_status:known_not_affected": "1",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: usb-storage: alauda: Fix uninit-value in alauda_check_media()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2023/cve-2023-53847.json",
      "version": "3"
    }
  }
}



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Tags
Taxonomy of the tags.




Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.

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.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

JSON
How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.

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    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.