s390/pkey: Prevent overflow in size calculation for memdup_user()
In the Linux kernel, the following vulnerability has been resolved: s390/pkey: Prevent overflow in size calculation for memdup_user() Number of apqn target list entries contained in 'nr_apqns' variable is determined by userspace via an ioctl call so the result of the product in calculation of size passed to memdup_user() may overflow. In this case the actual size of the allocated area and the value describing it won't be in sync leading to various types of unpredictable behaviour later. Use a proper memdup_array_user() helper which returns an error if an overflow is detected. Note that it is different from when nr_apqns is initially zero - that case is considered valid and should be handled in subsequent pkey_handler implementations. Found by Linux Verification Center (linuxtesting.org).
CVE-2025-38257
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-2025-38257
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": "f2bbc96e7cfad3891b7bf9bd3e566b9b7ab4553d",
"lessThan": "ad1bdd24a02d5a8d119af8e4cd50933780a6d29f",
"versionType": "git"
},
{
"status": "affected",
"version": "f2bbc96e7cfad3891b7bf9bd3e566b9b7ab4553d",
"lessThan": "faa1ab4a23c42e34dc000ef4977b751d94d5148c",
"versionType": "git"
},
{
"status": "affected",
"version": "f2bbc96e7cfad3891b7bf9bd3e566b9b7ab4553d",
"lessThan": "88f3869649edbc4a13f6c2877091f81cd5a50f05",
"versionType": "git"
},
{
"status": "affected",
"version": "f2bbc96e7cfad3891b7bf9bd3e566b9b7ab4553d",
"lessThan": "f855b119e62b004a5044ed565f2a2b368c4d3f16",
"versionType": "git"
},
{
"status": "affected",
"version": "f2bbc96e7cfad3891b7bf9bd3e566b9b7ab4553d",
"lessThan": "73483ca7e07a5e39bdf612eec9d3d293e8bef649",
"versionType": "git"
},
{
"status": "affected",
"version": "f2bbc96e7cfad3891b7bf9bd3e566b9b7ab4553d",
"lessThan": "7360ee47599af91a1d5f4e74d635d9408a54e489",
"versionType": "git"
}
],
"programFiles": [
"drivers/s390/crypto/pkey_api.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.4"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.4",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.15.187",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.143",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.96",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.36",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.15.5",
"versionType": "semver",
"lessThanOrEqual": "6.15.*"
},
{
"status": "unaffected",
"version": "6.16",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/s390/crypto/pkey_api.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2025-38257
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #30551 · Revision 1
- Added to Heist Feed
- Publisher date