CVE-2026-90327
phonet: pep: do not write beyond optlen in getsockopt
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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.
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | Sep 17, 2026 |
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Affected Versions
Linux / Linux
02a47617cdce440f60c71a51f3a93f9f5fcc5a7a < 6054fed6bad08b6d03973e8ffca7f0c9394d1c30 02a47617cdce440f60c71a51f3a93f9f5fcc5a7a < eac733a0b6fe0a52d91f9f623425735ed50ac6c2 02a47617cdce440f60c71a51f3a93f9f5fcc5a7a < 95e0ed2439dd1792eb454c68ae8d10f30ffe3bff 02a47617cdce440f60c71a51f3a93f9f5fcc5a7a < 056eea1a2068ad2fb7c3093c5f1095268f87d0c7 02a47617cdce440f60c71a51f3a93f9f5fcc5a7a < 1bf499e438da80455e258049bce60ffb3a53f3fa 02a47617cdce440f60c71a51f3a93f9f5fcc5a7a < c4487e4d5309de587479ecc2f5173b49586f46f4 02a47617cdce440f60c71a51f3a93f9f5fcc5a7a < f97022fefe6eb06ee18549d603420440f2959802 02a47617cdce440f60c71a51f3a93f9f5fcc5a7a < 77e5eb0e192aec6710c03ca8144582fd2af36ca4
Linux / Linux
2.6.28
References
git.kernel.org: https://git.kernel.org/stable/c/6054fed6bad08b6d03973e8ffca7f0c9394d1c30 git.kernel.org: https://git.kernel.org/stable/c/eac733a0b6fe0a52d91f9f623425735ed50ac6c2 git.kernel.org: https://git.kernel.org/stable/c/95e0ed2439dd1792eb454c68ae8d10f30ffe3bff git.kernel.org: https://git.kernel.org/stable/c/056eea1a2068ad2fb7c3093c5f1095268f87d0c7 git.kernel.org: https://git.kernel.org/stable/c/1bf499e438da80455e258049bce60ffb3a53f3fa git.kernel.org: https://git.kernel.org/stable/c/c4487e4d5309de587479ecc2f5173b49586f46f4 git.kernel.org: https://git.kernel.org/stable/c/f97022fefe6eb06ee18549d603420440f2959802 git.kernel.org: https://git.kernel.org/stable/c/77e5eb0e192aec6710c03ca8144582fd2af36ca4