cifs: Fix memory and information leak in smb3_reconfigure()
In the Linux kernel, the following vulnerability has been resolved: cifs: Fix memory and information leak in smb3_reconfigure() In smb3_reconfigure(), if smb3_sync_session_ctx_passwords() fails, the function returns immediately without freeing and erasing the newly allocated new_password and new_password2. This causes both a memory leak and a potential information leak. Fix this by calling kfree_sensitive() on both password buffers before returning in this error case.
02 / AFFECTED SOFTWARE
Affected packages
963 explicit affected versions
04 / EVIDENCE
Source records
In the Linux kernel, the following vulnerability has been resolved: cifs: Fix memory and information leak in smb3_reconfigure() In smb3_reconfigure(), if smb3_sync_session_ctx_passwords() fails, the function returns immediately without freeing and erasing the newly allocated new_password and new_password2. This causes both a memory leak and a potential information leak. Fix this by calling kfree_sensitive() on both password buffers before returning in this error case.
05 / REFERENCES
Further evidence
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- https://git.kernel.org/stable/c/5679cc90bb5415801fa29041da0319d9e15d295d
- https://git.kernel.org/stable/c/bb82aaee16907dc4d0b9b0ca7953ceb3edc328c6
- https://git.kernel.org/stable/c/bc390b2737205163e48cc1655f6a0c8cd55b02fc
- https://git.kernel.org/stable/c/cb6d5aa9c0f10074f1ad056c3e2278ad2cc7ec8d
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/71xxx/CVE-2025-71151.json
- https://nvd.nist.gov/vuln/detail/CVE-2025-71151