phonet: pep: do not write beyond optlen in getsockopt
In the Linux kernel, the following vulnerability has been resolved: phonet: pep: do not write beyond optlen in getsockopt pep_getsockopt() clamps the reported length to the caller's buffer with min_t(), but then stores the value with put_user(val, (int __user *) optval), which always writes sizeof(int) bytes. A getsockopt() call with an optlen smaller than sizeof(int) thus reports the clamped length yet writes a full int, one to three bytes past the user buffer. Write the value with copy_to_user() bounded by len, so at most optlen bytes are copied, matching the length reported back to userspace.
CVE-2026-90327
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-2026-90327
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": "02a47617cdce440f60c71a51f3a93f9f5fcc5a7a",
"lessThan": "6054fed6bad08b6d03973e8ffca7f0c9394d1c30",
"versionType": "git"
},
{
"status": "affected",
"version": "02a47617cdce440f60c71a51f3a93f9f5fcc5a7a",
"lessThan": "eac733a0b6fe0a52d91f9f623425735ed50ac6c2",
"versionType": "git"
},
{
"status": "affected",
"version": "02a47617cdce440f60c71a51f3a93f9f5fcc5a7a",
"lessThan": "95e0ed2439dd1792eb454c68ae8d10f30ffe3bff",
"versionType": "git"
},
{
"status": "affected",
"version": "02a47617cdce440f60c71a51f3a93f9f5fcc5a7a",
"lessThan": "056eea1a2068ad2fb7c3093c5f1095268f87d0c7",
"versionType": "git"
},
{
"status": "affected",
"version": "02a47617cdce440f60c71a51f3a93f9f5fcc5a7a",
"lessThan": "1bf499e438da80455e258049bce60ffb3a53f3fa",
"versionType": "git"
},
{
"status": "affected",
"version": "02a47617cdce440f60c71a51f3a93f9f5fcc5a7a",
"lessThan": "c4487e4d5309de587479ecc2f5173b49586f46f4",
"versionType": "git"
},
{
"status": "affected",
"version": "02a47617cdce440f60c71a51f3a93f9f5fcc5a7a",
"lessThan": "f97022fefe6eb06ee18549d603420440f2959802",
"versionType": "git"
},
{
"status": "affected",
"version": "02a47617cdce440f60c71a51f3a93f9f5fcc5a7a",
"lessThan": "77e5eb0e192aec6710c03ca8144582fd2af36ca4",
"versionType": "git"
}
],
"programFiles": [
"net/phonet/pep.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "2.6.28"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "2.6.28",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.270",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.221",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.188",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.157",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.110",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.52",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.6",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/phonet/pep.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-90327
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #36673 · Revision 1
- Added to Heist Feed
- Publisher date