What’s Vulnerable › Vulnerabilities

CVE-2025-71151: cifs: Fix memory and information leak in smb3_reconfigure()

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-01-23 · updated 2026-06-17
• Weakness: CWE-401

Description

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.

Affected products

• Linux kernel: from 6.6.64 before 6.6.120; from 6.11.11 before 6.12; from 6.12.2 before 6.12.64; from 6.13 before 6.18.3; 6.19-rc1, 6.19-rc2 — fixed in 6.12, 6.12.64, 6.18.3, 6.6.120

How to fix

Upgrade to a fixed version: Linux kernel 6.12, 6.12.64, 6.18.3, 6.6.120. Check the vendor advisory for mitigations.

References

• 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

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