Linux kernel BPF tcx/netkit unauthorized detach permission bypass
CVE-2026-45932 is a local privilege/authorization flaw in the Linux kernel BPF detach path affecting tcx and netkit devices. When BPF_PROG_DETACH was invoked without supplying a program file descriptor, the kernel failed to enforce the intended permission checks, allowing the detach operation to proceed for unprivileged users. The issue is described in the upstream fix as: "bpf: Fix tcx/netkit detach permissions when prog fd isn't given." The remediation adds an explicit capability check requiring CAP_NET_ADMIN or CAP_SYS_ADMIN when no program fd is provided.
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Impact, mitigation & remediation
What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
Impact
What an attacker gets, and what they’ve been doing with it.
Mitigation
If you can’t patch tonight, do this now.
Remediation
Patch, then assume compromise.
Exploits
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Affected products & vendors
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
Recent activity
6 sources tracked across advisories and community write-ups. News coverage will land here when it surfaces.
No news coverage yet. Advisories and community discussion only.
The version that knows your environment.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.