CVE - CVE-2025-21666

CVE-ID
CVE-2025-21666	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
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.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://git.kernel.org/stable/c/91751e248256efc111e52e15115840c35d85abaf URL:https://git.kernel.org/stable/c/91751e248256efc111e52e15115840c35d85abaf MISC:https://git.kernel.org/stable/c/9e5fed46ccd2c34c5fa5a9c8825ce4823fdc853e URL:https://git.kernel.org/stable/c/9e5fed46ccd2c34c5fa5a9c8825ce4823fdc853e MISC:https://git.kernel.org/stable/c/b52e50dd4fabd12944172bd486a4f4853b7f74dd URL:https://git.kernel.org/stable/c/b52e50dd4fabd12944172bd486a4f4853b7f74dd MISC:https://git.kernel.org/stable/c/bc9c49341f9728c31fe248c5fbba32d2e81a092b URL:https://git.kernel.org/stable/c/bc9c49341f9728c31fe248c5fbba32d2e81a092b MISC:https://git.kernel.org/stable/c/c23d1d4f8efefb72258e9cedce29de10d057f8ca URL:https://git.kernel.org/stable/c/c23d1d4f8efefb72258e9cedce29de10d057f8ca MISC:https://git.kernel.org/stable/c/daeac89cdb03d30028186f5ff7dc26ec8fa843e7 URL:https://git.kernel.org/stable/c/daeac89cdb03d30028186f5ff7dc26ec8fa843e7
Assigning CNA
kernel.org
Date Record Created
20241229	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20241229)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
This is an record on the CVE List, which provides common identifiers for publicly known cybersecurity vulnerabilities.
Search CVE Using Keywords: You can also search by reference using the CVE Reference Maps.
For More Information: CVE Request Web Form (select "Other" from dropdown)