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VulnerabilityPublished Updated

CVE-2025-68773: Linux kernel · spi: fsl-cpm: Check length parity before switching to 16 bit mode

Affects Linux kernelSource CVE Database V5

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Not known to be exploited · fixed in c8f1d35076b78df61ace737e41cc1f4b7b63236c : update Linux kernel when convenient.

Data as of 10 Nov 2026, 13:18 UTC

Severity
Medium

Rated Medium by Threat Radar's AI analysis · No CVSS score from NVD or the CNA

Thin evidence

One scorer or none
Patch
Available – fixed in c8f1d35076b78df61ace737e41cc1f4b7b63236c, be0b613198e6bfa104ad520397cab82ad3ec1771, 1417927df8049a0194933861e9b098669a95c762 +12

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 13 Jan 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 10 Nov 2026.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

ProductAffectedFixed in
LinuxLinuxAffected
  • >=5.10.181 <5.10.248
  • >=5.15.114 <5.15.198
  • >=6.1.29 <6.1.160
  • >=4.14.316 <4.15
  • >=4.19.284 <4.20
  • >=5.4.244 <5.5
  • >=6.2.16 <6.3
  • >=6.3.3 <6.4
Fixed in
  • c8f1d35076b78df61ace737e41cc1f4b7b63236c
  • be0b613198e6bfa104ad520397cab82ad3ec1771
  • 1417927df8049a0194933861e9b098669a95c762
  • 837a23a11e0f734f096c7c7b0778d0e625e3dc87
  • 743cebcbd1b2609ec5057ab474979cef73d1b681
  • 9c34a4a2ead00979d203a8c16bea87f0ef5291d8
  • 6.4
  • 6.3
  • 6.1.160
  • 5.15.198
  • 5.10.248
  • 5.5
  • 4.20
  • 4.15
  • 3dd6d01384823e1bd8602873153d6fc4337ac4fe
LinuxLinuxAffected
  • =6.4
Fixed in–

AI-suggested

Apply the official Linux kernel patches that fix this issue. The vulnerability is fixed in Linux kernel versions 5.10.248, 5.15.198, 6.1.160, 6.2.16 and later, 6.3, 6.4, and corresponding backports. Users should upgrade to these fixed versions to mitigate the risk.

Description

A vulnerability in the Linux kernel's fsl-cpm SPI driver allowed a buffer overrun due to missing length parity checks before switching to 16-bit mode. This flaw was introduced when a dynamically allocated bounce buffer was added, which did not ensure the transfer size was even. The issue has been fixed by adding a length parity check to remain in 8-bit mode when the transfer length is odd.

References

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