CVE-2023-52703

Local service interruption via uninitialized USB length

Published May 21, 2024 · Updated May 11, 2026

Use of an uninitialized resource in the Kalmia USB driver in Linux allows local users to interrupt service through a USB transfer error. On an error from usb_bulk_msg(), kalmia_send_init_packet() passes an uninitialized act_len value into the diagnostic path instead of omitting it. Exposure requires the Kalmia USB initialization path and a failed bulk transfer; the public record does not specify whether interruption takes the form of a crash or hang.

CVSS severity5.5
Medium
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use of an uninitialized resource in the Kalmia USB driver in Linux allows local users to interrupt service through a USB transfer error. On an error from usb_bulk_msg(), kalmia_send_init_packet() passes an uninitialized act_len value into the diagnostic path instead of omitting it. Exposure requires the Kalmia USB initialization path and a failed bulk transfer; the public record does not specify whether interruption takes the form of a crash or hang.

The record

CVE
CVE-2023-52703
Published
May 21, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-908, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 21, 2024CVE publishedPublication date reported by the CVE source.
  2. May 11, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=3.0
  2. Affected versionversion=d40261236e8e278cb1936cb5e934262971692b10 <02df3170c04a8356cd571ab9155a42f030190abc
  3. Affected versionversion=d40261236e8e278cb1936cb5e934262971692b10 <1b5de7d44890b78519acbcc80d8d1f23ff2872e5
  4. Affected versionversion=d40261236e8e278cb1936cb5e934262971692b10 <338f826d3afead6e4df521f7972a4bef04a72efb
  5. Affected versionversion=d40261236e8e278cb1936cb5e934262971692b10 <525bdcb0838d19d918c7786151ee14661967a030
  6. Affected versionversion=d40261236e8e278cb1936cb5e934262971692b10 <723ef7b66f37c0841f5a451ccbce47ee1641e081
  7. Affected versionversion=d40261236e8e278cb1936cb5e934262971692b10 <a753352622b4f3c0219e0e9c73114b2848ae6042
  8. Affected versionversion=d40261236e8e278cb1936cb5e934262971692b10 <c68f345b7c425b38656e1791a0486769a8797016

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=3.0; version=d40261236e8e278cb1936cb5e934262971692b10 <02df3170c04a8356cd571ab9155a42f030190abc; version=d40261236e8e278cb1936cb5e934262971692b10 <1b5de7d44890b78519acbcc80d8d1f23ff2872e5; version=d40261236e8e278cb1936cb5e934262971692b10 <338f826d3afead6e4df521f7972a4bef04a72efb; version=d40261236e8e278cb1936cb5e934262971692b10 <525bdcb0838d19d918c7786151ee14661967a030; version=d40261236e8e278cb1936cb5e934262971692b10 <723ef7b66f37c0841f5a451ccbce47ee1641e081; version=d40261236e8e278cb1936cb5e934262971692b10 <a753352622b4f3c0219e0e9c73114b2848ae6042; version=d40261236e8e278cb1936cb5e934262971692b10 <c68f345b7c425b38656e1791a0486769a8797016

Published CVSS scores

3.3CISA-ADPCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-908Use of Uninitialized Resource
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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