What’s Vulnerable › Vulnerabilities

CVE-2024-46686: smb/client: avoid dereferencing rdata=NULL in smb2_new_read_req()

• Severity: medium (CVSS 5.5 v3.1)
• 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: 2024-09-13 · updated 2026-06-17
• Weakness: CWE-476

Description

In the Linux kernel, the following vulnerability has been resolved: smb/client: avoid dereferencing rdata=NULL in smb2_new_read_req() This happens when called from SMB2_read() while using rdma and reaching the rdma_readwrite_threshold.

Affected products

• Linux kernel: from 6.1.16 before 6.1.108; from 6.3 before 6.6.49; from 6.7 before 6.10.8; 6.2.3, 6.11-rc1, 6.11-rc2, 6.11-rc3, 6.11-rc4, 6.11-rc5 — fixed in 6.1.108, 6.10.8, 6.6.49

How to fix

Upgrade to a fixed version: Linux kernel 6.1.108, 6.10.8, 6.6.49. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/6df57c63c200cd05e085c3b695128260e21959b7
• https://git.kernel.org/stable/c/a01859dd6aebf826576513850a3b05992809e9d2
• https://git.kernel.org/stable/c/b902fb78ab21299e4dd1775e7e8d251d5c0735bc
• https://git.kernel.org/stable/c/c724b2ab6a46435b4e7d58ad2fbbdb7a318823cf
• https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html

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