spi: fsl-cpm: Check length parity before switching to 16 bit mode
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.
CVE-2025-68773
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2025-68773
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "60afe299bb541a928ba39bcb4ae8d3e428d1c5a5",
"lessThan": "c8f1d35076b78df61ace737e41cc1f4b7b63236c",
"versionType": "git"
},
{
"status": "affected",
"version": "4badd33929c05ed314794b95f1af1308f7222be8",
"lessThan": "9c34a4a2ead00979d203a8c16bea87f0ef5291d8",
"versionType": "git"
},
{
"status": "affected",
"version": "7f6738e003b364783f3019fdf6e7645bc8dd1643",
"lessThan": "837a23a11e0f734f096c7c7b0778d0e625e3dc87",
"versionType": "git"
},
{
"status": "affected",
"version": "fc96ec826bced75cc6b9c07a4ac44bbf651337ab",
"lessThan": "3dd6d01384823e1bd8602873153d6fc4337ac4fe",
"versionType": "git"
},
{
"status": "affected",
"version": "fc96ec826bced75cc6b9c07a4ac44bbf651337ab",
"lessThan": "743cebcbd1b2609ec5057ab474979cef73d1b681",
"versionType": "git"
},
{
"status": "affected",
"version": "fc96ec826bced75cc6b9c07a4ac44bbf651337ab",
"lessThan": "be0b613198e6bfa104ad520397cab82ad3ec1771",
"versionType": "git"
},
{
"status": "affected",
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"versionType": "git"
},
{
"status": "affected",
"version": "42c04316d9275ec267d36e5e9064cd56c9884148",
"versionType": "git"
},
{
"status": "affected",
"version": "dc120f2d35b030390a2bc0f94dd5f37e900cae91",
"versionType": "git"
},
{
"status": "affected",
"version": "b558275c1b040f0e5aa56c862241f9212b6118c3",
"versionType": "git"
},
{
"status": "affected",
"version": "b9d9e8856f1c83e4277403f9b4c369b322ebcb12",
"versionType": "git"
},
{
"status": "affected",
"version": "36a6d0f66c874666caf4e8be155b1be30f6231be",
"versionType": "git"
},
{
"status": "affected",
"version": "5.10.181",
"lessThan": "5.10.248",
"versionType": "semver"
},
{
"status": "affected",
"version": "5.15.114",
"lessThan": "5.15.198",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.1.29",
"lessThan": "6.1.160",
"versionType": "semver"
},
{
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"lessThan": "4.15",
"versionType": "semver"
},
{
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"lessThan": "4.20",
"versionType": "semver"
},
{
"status": "affected",
"version": "5.4.244",
"lessThan": "5.5",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.2.16",
"lessThan": "6.3",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.3.3",
"lessThan": "6.4",
"versionType": "semver"
}
],
"programFiles": [
"drivers/spi/spi-fsl-spi.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.4"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.4",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.248",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.198",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.160",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.120",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.64",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.3",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "6.19",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/spi/spi-fsl-spi.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2025-68773
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #27125 · Revision 1
- Added to Heist Feed
- Publisher date