{"id":"CVE-2026-90327","published":"2026-09-17T17:17:30.800","lastModified":"2026-09-17T17:17:30.800","description":"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.","cvssScore":null,"cvssSeverity":null,"cvssVector":null,"cwes":[],"vendors":[],"products":[],"references":[{"url":"https://git.kernel.org/stable/c/056eea1a2068ad2fb7c3093c5f1095268f87d0c7","tags":[]},{"url":"https://git.kernel.org/stable/c/1bf499e438da80455e258049bce60ffb3a53f3fa","tags":[]},{"url":"https://git.kernel.org/stable/c/6054fed6bad08b6d03973e8ffca7f0c9394d1c30","tags":[]},{"url":"https://git.kernel.org/stable/c/77e5eb0e192aec6710c03ca8144582fd2af36ca4","tags":[]},{"url":"https://git.kernel.org/stable/c/95e0ed2439dd1792eb454c68ae8d10f30ffe3bff","tags":[]},{"url":"https://git.kernel.org/stable/c/c4487e4d5309de587479ecc2f5173b49586f46f4","tags":[]},{"url":"https://git.kernel.org/stable/c/eac733a0b6fe0a52d91f9f623425735ed50ac6c2","tags":[]},{"url":"https://git.kernel.org/stable/c/f97022fefe6eb06ee18549d603420440f2959802","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":null}