CVE-2025-68773

Service interruption via odd-length SPI transfer

Published Jan 13, 2026 · Updated Jan 13, 2026

Buffer overrun in the Linux kernel fsl-cpm SPI driver allows local users to interrupt service through an odd-length EEPROM read. The driver enters 16-bit transfer mode without verifying even length, so an exact-size bounce buffer is overrun by an odd transfer. Exploitation requires local low-privileged access and affected Freescale CPM SPI hardware; the documented consequence is kernel availability loss.

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

Buffer overrun in the Linux kernel fsl-cpm SPI driver allows local users to interrupt service through an odd-length EEPROM read. The driver enters 16-bit transfer mode without verifying even length, so an exact-size bounce buffer is overrun by an odd transfer. Exploitation requires local low-privileged access and affected Freescale CPM SPI hardware; the documented consequence is kernel availability loss.

The record

CVE
CVE-2025-68773
Published
Jan 13, 2026
Updated
Jan 13, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 13, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 13, 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=36a6d0f66c874666caf4e8be155b1be30f6231be
  2. Affected versionversion=42c04316d9275ec267d36e5e9064cd56c9884148
  3. Affected versionversion=4badd33929c05ed314794b95f1af1308f7222be8
  4. Affected versionversion=60afe299bb541a928ba39bcb4ae8d3e428d1c5a5
  5. Affected versionversion=6.4
  6. Affected versionversion=7f6738e003b364783f3019fdf6e7645bc8dd1643 <837a23a11e0f734f096c7c7b0778d0e625e3dc87
  7. Affected versionversion=b558275c1b040f0e5aa56c862241f9212b6118c3
  8. Affected versionversion=b9d9e8856f1c83e4277403f9b4c369b322ebcb12
  9. Affected versionversion=dc120f2d35b030390a2bc0f94dd5f37e900cae91
  10. Affected versionversion=fc96ec826bced75cc6b9c07a4ac44bbf651337ab <1417927df8049a0194933861e9b098669a95c762
  11. Affected versionversion=fc96ec826bced75cc6b9c07a4ac44bbf651337ab <3dd6d01384823e1bd8602873153d6fc4337ac4fe
  12. Affected versionversion=fc96ec826bced75cc6b9c07a4ac44bbf651337ab <743cebcbd1b2609ec5057ab474979cef73d1b681
  13. Affected versionversion=fc96ec826bced75cc6b9c07a4ac44bbf651337ab <be0b613198e6bfa104ad520397cab82ad3ec1771

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=36a6d0f66c874666caf4e8be155b1be30f6231be; version=42c04316d9275ec267d36e5e9064cd56c9884148; version=4badd33929c05ed314794b95f1af1308f7222be8; version=60afe299bb541a928ba39bcb4ae8d3e428d1c5a5; version=6.4; version=7f6738e003b364783f3019fdf6e7645bc8dd1643 <837a23a11e0f734f096c7c7b0778d0e625e3dc87; version=b558275c1b040f0e5aa56c862241f9212b6118c3; version=b9d9e8856f1c83e4277403f9b4c369b322ebcb12; version=dc120f2d35b030390a2bc0f94dd5f37e900cae91; version=fc96ec826bced75cc6b9c07a4ac44bbf651337ab <1417927df8049a0194933861e9b098669a95c762; version=fc96ec826bced75cc6b9c07a4ac44bbf651337ab <3dd6d01384823e1bd8602873153d6fc4337ac4fe; version=fc96ec826bced75cc6b9c07a4ac44bbf651337ab <743cebcbd1b2609ec5057ab474979cef73d1b681; version=fc96ec826bced75cc6b9c07a4ac44bbf651337ab <be0b613198e6bfa104ad520397cab82ad3ec1771

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

T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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