What’s Vulnerable › Vulnerabilities

CVE-2023-53335: RDMA/cxgb4: Fix potential null-ptr-deref in pass_establish()

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-09-17 · updated 2026-08-04
• Weakness: CWE-476

Description

In the Linux kernel, the following vulnerability has been resolved: RDMA/cxgb4: Fix potential null-ptr-deref in pass_establish() If get_ep_from_tid() fails to lookup non-NULL value for ep, ep is dereferenced later regardless of whether it is empty. This patch adds a simple sanity check to fix the issue. Found by Linux Verification Center (linuxtesting.org) with SVACE.

Affected products

• Linux kernel: from 4.7 before 5.15.99; from 5.16 before 6.1.16; from 6.2 before 6.2.3 — fixed in 5.15.99, 6.1.16, 6.2.3

How to fix

Upgrade to a fixed version: Linux kernel 5.15.99, 6.1.16, 6.2.3. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/283861a4c52c1ea4df3dd1b6fc75a50796ce3524
• https://git.kernel.org/stable/c/2cfc00e974d75a3aa8155f2660f57d342e1f67ca
• https://git.kernel.org/stable/c/9dca64042d855a24b0bd81ce242e5dc7e939f6eb
• https://git.kernel.org/stable/c/9ddc77eefb2a567b705c3c86ab2ddabe43cadf1b

Get alerted when CVE-2023-53335 or the next vulnerability affects your stack