CVE-2025-38566
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2025-38566
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-38566.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2025-38566
- Downstream
- Related
- Published
- 2025-08-19T17:02:42Z
- Modified
- 2025-10-10T15:41:46.909714Z
- Summary
- sunrpc: fix handling of server side tls alerts
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
sunrpc: fix handling of server side tls alerts
Scott Mayhew discovered a security exploit in NFS over TLS in tlsalertrecv() due to its assumption it can read data from the msg iterator's kvec..
kTLS implementation splits TLS non-data record payload between the control message buffer (which includes the type such as TLS aler or TLS cipher change) and the rest of the payload (say TLS alert's level/description) which goes into the msg payload buffer.
This patch proposes to rework how control messages are setup and used by sock_recvmsg().
If no control message structure is setup, kTLS layer will read and process TLS data record types. As soon as it encounters a TLS control message, it would return an error. At that point, NFS can setup a kvec backed msg buffer and read in the control message such as a TLS alert. Msg iterator can advance the kvec pointer as a part of the copy process thus we need to revert the iterator before calling into the tlsalertrecv.
- References
-
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- https://git.kernel.org/stable/c/25bb3647d30a20486b5fe7cff2b0e503c16c9692
- https://git.kernel.org/stable/c/3b549da875414989f480b66835d514be80a0bd9c
- https://git.kernel.org/stable/c/6b33c31cc788073bfbed9297e1f4486ed73d87da
- https://git.kernel.org/stable/c/b1df394621710b312f0393e3f240fdac0764f968
- https://git.kernel.org/stable/c/bee47cb026e762841f3faece47b51f985e215edb
Affected packages
Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected ranges
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced5e052dda121e2870dd87181783da4a95d7d2927bFixedb1df394621710b312f0393e3f240fdac0764f968
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced5e052dda121e2870dd87181783da4a95d7d2927bFixed25bb3647d30a20486b5fe7cff2b0e503c16c9692
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced5e052dda121e2870dd87181783da4a95d7d2927bFixed3b549da875414989f480b66835d514be80a0bd9c
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced5e052dda121e2870dd87181783da4a95d7d2927bFixed6b33c31cc788073bfbed9297e1f4486ed73d87da
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced5e052dda121e2870dd87181783da4a95d7d2927bFixedbee47cb026e762841f3faece47b51f985e215edb