CVE-2025-21666Medium· 5.5▾ SunlitIn the Linux kernel, the following vulnerability has been resolved: vsock: prevent null-ptr-deref in vsock_*[has_data|has_space] Recent reports have shown how we sometimes call vsock_*_has_data() when a vsock socket has been de-assigne…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 30.3 · likelihood 0 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake. The CVSS score shown above comes from the CISA ADP record, not NVD.
Exploit-prediction probability, daily snapshots since Oct 15.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Last analysed / modified upstream
0.2%
In the Linux kernel, the following vulnerability has been resolved:
vsock: prevent null-ptr-deref in vsock_*[has_data|has_space]
Recent reports have shown how we sometimes call vsock_*_has_data() when a vsock socket has been de-assigned from a transport (see attached links), but we shouldn't.
Previous commits should have solved the real problems, but we may have more in the future, so to avoid null-ptr-deref, we can return 0 (no space, no data available) but with a warning.
This way the code should continue to run in a nearly consistent state and have a warning that allows us to debug future problems.
Linux >= c0cfa2d8a788fcf45df5bf4070ab2474c88d543a < daeac89cdb03d30028186f5ff7dc26ec8fa843e7Linux >= c0cfa2d8a788fcf45df5bf4070ab2474c88d543a < 9e5fed46ccd2c34c5fa5a9c8825ce4823fdc853eLinux >= c0cfa2d8a788fcf45df5bf4070ab2474c88d543a < b52e50dd4fabd12944172bd486a4f4853b7f74ddLinux >= c0cfa2d8a788fcf45df5bf4070ab2474c88d543a < bc9c49341f9728c31fe248c5fbba32d2e81a092bLinux >= c0cfa2d8a788fcf45df5bf4070ab2474c88d543a < c23d1d4f8efefb72258e9cedce29de10d057f8caLinux >= c0cfa2d8a788fcf45df5bf4070ab2474c88d543a < 91751e248256efc111e52e15115840c35d85abafLinux 5.5Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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