CVE-2025-68773
In the Linux kernel, the following vulnerability has been resolved: spi: fsl-cpm: Check length parity before switching to 16 bit mode Commit fc96ec826bce ("spi: fsl-cpm: Use 16 bit mode for large transfers with even size") failed to make sure that the size is really even before switching to 16 bit mode. Until recently the problem went unnoticed because kernfs uses a pre-allocated bounce buffer of size PAGE_SIZE for reading EEPROM. But commit 8ad6249c51d0 ("eeprom: at25: convert to spi-mem API") introduced an additional dynamically allocated bounce buffer whose size is exactly the size of the transfer, leading to a buffer overrun in the fsl-cpm driver when that size is odd. Add the missing length parity verification and remain in 8 bit mode when the length is not even.
Affected versions
Linux kernel versions
5.10.181,
5.15.114,
6.1.29,
4.14.316,
4.19.284,
5.4.244,
6.2.16,
6.3.3,
6.4
and later are affected. Fixed in
5.10.248,
5.15.198,
6.1.160,
6.6.120,
6.12.64,
6.18.3,
6.19
and their respective stable series.
References
The following references provide additional information about CVE-2025-68773 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.
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PatchKernel patch commithttps://git.kernel.org/stable/c/1417927df8049a0194933861e9b098669a95c762
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PatchKernel patch commithttps://git.kernel.org/stable/c/3dd6d01384823e1bd8602873153d6fc4337ac4fe
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PatchKernel patch commithttps://git.kernel.org/stable/c/743cebcbd1b2609ec5057ab474979cef73d1b681
Frequently asked questions
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What is CVE-2025-68773?
CVE-2025-68773 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 5.10.181 onward and has been patched in 5.10.248, 5.15.198, 6.1.160 and others. CVE-2025-68773 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
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Is there a patch available for CVE-2025-68773?
Yes — CVE-2025-68773 has been patched. Fixed versions include 5.10.248, 5.15.198, 6.1.160 and others. If you are running Linux kernel 5.10.181 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2025-68773 actively exploited?
No — CVE-2025-68773 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.