CVE Database›Document archive›CVE-2026-52967

CVE-2026-52967

kernel: smb/client: fix possible infinite loop and oob read in symlink_data()

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Severity

Moderate

Red Hat Product Security

5.5

CVSS 3.1

Review impact separately from score.

Published · June 24, 2026

Updated · October 30, 2026

Description

A flaw was found in the Linux kernel's Server Message Block (SMB) client. This vulnerability, located in the symlink_data() function, could allow a malicious SMB server to trigger an infinite loop, leading to a Denial of Service (DoS) condition. Additionally, an out-of-bounds read could occur, potentially leading to information disclosure.

Statement

This vulnerability is rated as Moderate impact for Red Hat Enterprise Linux because exploitation requires a client to actively connect and mount a share from a malicious or compromised SMB server. Under typical enterprise deployments, SMB client connections are directed to trusted internal file servers rather than untrusted remote endpoints. While processing crafted symlink error responses from an attacker-controlled server can trigger a client-side denial of service or out-of-bounds read, it does not grant direct arbitrary code execution.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 5.5
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CWE-190 · Integer Overflow or Wraparound