What’s Vulnerable › Vulnerabilities

CVE-2023-53733: net: sched: cls_u32: Undo tcf_bind_filter if u32_replace_hw_knode

• Severity: high (CVSS 7.8 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: 2025-10-24 · updated 2026-10-30

Description

In the Linux kernel, the following vulnerability has been resolved: net: sched: cls_u32: Undo tcf_bind_filter if u32_replace_hw_knode When u32_replace_hw_knode fails, we need to undo the tcf_bind_filter operation done at u32_set_parms.

Affected products

• Linux: 4.7 — fixed in 6.5

How to fix

Upgrade to a fixed version: Linux 6.5. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/025159ed118ba5145b241d574edadb0e00d3c20f
• https://git.kernel.org/stable/c/3d5edcd3bca4aff15a18e45c79df1525059ab0e2
• https://git.kernel.org/stable/c/9cb36faedeafb9720ac236aeae2ea57091d90a09
• https://git.kernel.org/stable/c/a9345793469b65ee5ba7b033239916c2a67d3dd4
• https://git.kernel.org/stable/c/d83345a8c0143ea31822be0aeb91a63bfc58215e

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