Bug 2481905 (CVE-2026-45932)

Summary: CVE-2026-45932 kernel: bpf: Fix tcx/netkit detach permissions when prog fd isn't given
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: rhel-process-autobot, watson-tool-maintainers
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Hardware: All   
OS: Linux   
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Description OSIDB Bzimport 2026-05-27 15:01:40 UTC 
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.
Comment 1 Keith Grant 2026-05-28 00:42:52 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026052727-CVE-2026-45932-4fdf@gregkh/T