CVE-2026-90327

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.

CVSS

No CVSS.

References

Link	Resource
https://git.kernel.org/stable/c/056eea1a2068ad2fb7c3093c5f1095268f87d0c7
https://git.kernel.org/stable/c/1bf499e438da80455e258049bce60ffb3a53f3fa
https://git.kernel.org/stable/c/6054fed6bad08b6d03973e8ffca7f0c9394d1c30
https://git.kernel.org/stable/c/77e5eb0e192aec6710c03ca8144582fd2af36ca4
https://git.kernel.org/stable/c/95e0ed2439dd1792eb454c68ae8d10f30ffe3bff
https://git.kernel.org/stable/c/c4487e4d5309de587479ecc2f5173b49586f46f4
https://git.kernel.org/stable/c/eac733a0b6fe0a52d91f9f623425735ed50ac6c2
https://git.kernel.org/stable/c/f97022fefe6eb06ee18549d603420440f2959802

Configurations

No configuration.

History

17 Sep 2026, 17:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-09-17 17:17

Updated : 2026-09-17 17:17

NVD link : CVE-2026-90327

Mitre link : CVE-2026-90327

CVE.ORG link : CVE-2026-90327

JSON object : View

Products Affected

No product.

CWE

No CWE.

{"id": "CVE-2026-90327", "cveTags": [], "metrics": {}, "affected": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "affectedData": [{"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-rc1", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["net/phonet/pep.c"], "defaultStatus": "affected"}]}], "published": "2026-09-17T17:17:30.800", "references": [{"url": "https://git.kernel.org/stable/c/056eea1a2068ad2fb7c3093c5f1095268f87d0c7", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/1bf499e438da80455e258049bce60ffb3a53f3fa", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/6054fed6bad08b6d03973e8ffca7f0c9394d1c30", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/77e5eb0e192aec6710c03ca8144582fd2af36ca4", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/95e0ed2439dd1792eb454c68ae8d10f30ffe3bff", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/c4487e4d5309de587479ecc2f5173b49586f46f4", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/eac733a0b6fe0a52d91f9f623425735ed50ac6c2", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/f97022fefe6eb06ee18549d603420440f2959802", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Received", "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nphonet: pep: do not write beyond optlen in getsockopt\n\npep_getsockopt() clamps the reported length to the caller's buffer with\nmin_t(), but then stores the value with put_user(val, (int __user *)\noptval), which always writes sizeof(int) bytes. A getsockopt() call with\nan optlen smaller than sizeof(int) thus reports the clamped length yet\nwrites a full int, one to three bytes past the user buffer.\n\nWrite the value with copy_to_user() bounded by len, so at most optlen\nbytes are copied, matching the length reported back to userspace."}], "lastModified": "2026-09-17T17:17:30.800", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}