What’s Vulnerable › Vulnerabilities

CVE-2026-45932: bpf: Fix tcx/netkit detach permissions when prog fd isn't given

• Severity: high (CVSS 7.3 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: 2026-05-27 · updated 2026-10-21

Description

In the Linux kernel, the following vulnerability has been resolved: bpf: Fix tcx/netkit detach permissions when prog fd isn't given This commit fixes a security issue where BPF_PROG_DETACH on tcx or netkit devices could be executed by any user when no program fd was provided, bypassing permission checks. The fix adds a capability check for CAP_NET_ADMIN or CAP_SYS_ADMIN in this case.

Affected products

• Linux kernel: from 6.6 before 6.18.14; from 6.19 before 6.19.4 — fixed in 6.18.14, 6.19.4

How to fix

Upgrade to a fixed version: Linux kernel 6.18.14, 6.19.4. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/0c249f523175963b0a746bba673ecebdf6cefd86
• https://git.kernel.org/stable/c/3f04cc1e5374da4c5e791ae010a06cfea7bacbe6
• https://git.kernel.org/stable/c/4e0772cded109c238411f2fac36ac39302758b81
• https://git.kernel.org/stable/c/8e1623e7d61faf16cbadc80550da874303611ff5
• https://git.kernel.org/stable/c/ae23bc81ddf7c17b663c4ed1b21e35527b0a7131

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