CVE-2026-90327phonet: pep: do not write beyond optlen in getsockopt
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Sep 17, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 02a47617cdce440f60c71a51f3a93f9f5fcc5a7a before 6054fed6bad08b6d03973e8ffca7f0c9394d1c30; from 02a47617cdce440f60c71a51f3a93f9f5fcc5a7a before eac733a0b6fe0a52d91f9f623425735ed50ac6c2; from 02a47617cdce440f60c71a51f3a93f9f5fcc5a7a before 95e0ed2439dd1792eb454c68ae8d10f30ffe3bff; from 02a47617cdce440f60c71a51f3a93f9f5fcc5a7a before 056eea1a2068ad2fb7c3093c5f1095268f87d0c7; 02a47617cdce440f60c71a51f3a93f9f5fcc5a7a builds before 1bf499e438da80455e258049bce60ffb3a53f3fa; from 02a47617cdce440f60c71a51f3a93f9f5fcc5a7a before c4487e4d5309de587479ecc2f5173b49586f46f4; from 02a47617cdce440f60c71a51f3a93f9f5fcc5a7a before f97022fefe6eb06ee18549d603420440f2959802; from 02a47617cdce440f60c71a51f3a93f9f5fcc5a7a before 77e5eb0e192aec6710c03ca8144582fd2af36ca4 | CNA record |
References
- https://git.kernel.org/stable/c/6054fed6bad08b6d03973e8ffca7f0c9394d1c30
- https://git.kernel.org/stable/c/eac733a0b6fe0a52d91f9f623425735ed50ac6c2
- https://git.kernel.org/stable/c/95e0ed2439dd1792eb454c68ae8d10f30ffe3bff
- https://git.kernel.org/stable/c/056eea1a2068ad2fb7c3093c5f1095268f87d0c7
- https://git.kernel.org/stable/c/1bf499e438da80455e258049bce60ffb3a53f3fa
- https://git.kernel.org/stable/c/c4487e4d5309de587479ecc2f5173b49586f46f4
- https://git.kernel.org/stable/c/f97022fefe6eb06ee18549d603420440f2959802
- https://git.kernel.org/stable/c/77e5eb0e192aec6710c03ca8144582fd2af36ca4
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.