Description
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.
Metrics
No CVSS score has been published yet.
Affected software
Source: the vendor's advisory (CNA). NVD analysis pending.
| Vendor | Product | 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
- 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
Timeline
- Published
- Sep 17, 2026
- Last modified
- Oct 19, 2026
- NVD status
- Received