What’s Vulnerable › Vulnerabilities

CVE-2023-54260: cifs: Fix lost destroy smbd connection when MR allocate failed

• Severity: unknown
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-12-30 · updated 2026-06-17

Description

In the Linux kernel, the following vulnerability has been resolved: cifs: Fix lost destroy smbd connection when MR allocate failed If the MR allocate failed, the smb direct connection info is NULL, then smbd_destroy() will directly return, then the connection info will be leaked. Let's set the smb direct connection info to the server before call smbd_destroy().

Affected products

• Linux kernel: 4.16 — fixed in 6.3

How to fix

Upgrade to a fixed version: Linux kernel 6.3. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/04b7e13b8a13264282f874db5378fc3d3253cfac
• https://git.kernel.org/stable/c/324c0c34fff1affd436e509325cb46739209704e
• https://git.kernel.org/stable/c/46cd6c639cddba2bd2d810ceb16bb20374ad75b0
• https://git.kernel.org/stable/c/c51ae01104b318bf15f3c5097faba5c72addba7a
• https://git.kernel.org/stable/c/caac205e0d5b44c4c23a10c6c0976d50ebe16ac2
• https://git.kernel.org/stable/c/d303e25887127364a6765eaf7ac68aa2bac518a9
• https://git.kernel.org/stable/c/e9d3401d95d62a9531082cd2453ed42f2740e3fd

Get alerted when CVE-2023-54260 or the next vulnerability affects your stack