CVE-2023-54093

Local kernel crash via zero-length I2C message

Published Dec 24, 2025 · Updated Dec 24, 2025

NULL pointer dereference in the Linux Anysee USB media driver allows local users to crash the kernel through a malformed I2C message. anysee_master_xfer accepts a zero-length message whose buf pointer is null, then dereferences msg[i].buf[0] because prior checks do not reject that combination. Reachability requires local access and an Anysee USB DVB device using the driver; the bounded consequence is a kernel crash.

CVSS severity5.5
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in the Linux Anysee USB media driver allows local users to crash the kernel through a malformed I2C message. anysee_master_xfer accepts a zero-length message whose buf pointer is null, then dereferences msg[i].buf[0] because prior checks do not reject that combination. Reachability requires local access and an Anysee USB DVB device using the driver; the bounded consequence is a kernel crash.

The record

CVE
CVE-2023-54093
Published
Dec 24, 2025
Updated
Dec 24, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 24, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 24, 2025Record 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=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <14b94154a72388b57221a2a73795c0ea61a95373
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <3dd5846a873938ec7b6d404ec27662942cd8f2ef
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <4a9763d2bc4a6d6fab42555b9c0b2eefa32585ac
  4. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <5975dbbb7ad0767eaabd15d2c37a739ac76acb00
  5. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <73c0b224ceeba12dee2a7a8cbc147648da0b2e63
  6. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <8dc5b370254abc10f0cb4141d90cecf7ce465472
  7. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <c30411266fd67ea3c02a05c157231654d5a3bdc9
  8. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <e04affec2506ff5c12a18d78d7e694b3556a8982

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <14b94154a72388b57221a2a73795c0ea61a95373; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <3dd5846a873938ec7b6d404ec27662942cd8f2ef; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <4a9763d2bc4a6d6fab42555b9c0b2eefa32585ac; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <5975dbbb7ad0767eaabd15d2c37a739ac76acb00; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <73c0b224ceeba12dee2a7a8cbc147648da0b2e63; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <8dc5b370254abc10f0cb4141d90cecf7ce465472; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <c30411266fd67ea3c02a05c157231654d5a3bdc9; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <e04affec2506ff5c12a18d78d7e694b3556a8982

Published CVSS scores

5.5Amazon LinuxCVSS: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

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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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-476NULL Pointer Dereference
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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