bpf, xdp: move offload check into dev_xdp_install() (CVE-2026-90146) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-90146

bpf, xdp: move offload check into dev_xdp_install()

Answer in brief

CVE-2026-90146 records a Unknown severity vulnerability in bpf, xdp: move offload check into dev_xdp_install(). The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 17, 2026Updated Sep 17, 2026Source checked Sep 17, 2026First seen by HOL Sep 17, 2026Material review Sep 17, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Linux/Linuxgeneric	>=026a4c28e1db3b0cb99cd9a3e495d4a8b632fa74 <ea7b35dcc9430293b861bc7bad0c546f193c85f9 \|\| >=026a4c28e1db3b0cb99cd9a3e495d4a8b632fa74 <03022dd874070768a7099f18b1944c633641315f \|\| >=026a4c28e1db3b0cb99cd9a3e495d4a8b632fa74 <ad27ed7d2309419a129078d781504f486b1b469a	ea7b35dcc9430293b861bc7bad0c546f193c85f9, 03022dd874070768a7099f18b1944c633641315f, ad27ed7d2309419a129078d781504f486b1b469a
Linux/Linuxgeneric	5.9	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to ea7b35dcc9430293b861bc7bad0c546f193c85f9 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 17, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 17, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 17, 2026

Sources and claim methodology

Upstream source description

In the Linux kernel, the following vulnerability has been resolved: bpf, xdp: move offload check into dev_xdp_install() bpf_xdp_link_update() calls dev_xdp_install() directly and skips dev_xdp_attach(), so the checks in dev_xdp_attach() do not run. A user can make an XDP link with a normal program and then swap in an offloaded or device-bound program with BPF_LINK_UPDATE, which puts it on the software path. dev_xdp_install() is the one place all three paths go through: "ip link set xdp" and BPF_LINK_CREATE reach it via dev_xdp_attach(), and BPF_LINK_UPDATE calls it directly. So move the program checks (offloaded, bound to another device, device-bound in generic mode, native vs generic, DEVMAP and CPUMAP) there, and keep only the netlink-flag check (XDP_FLAGS_UPDATE_IF_NOEXIST) in dev_xdp_attach().

Quoted source text, attributed separately from HOL analysis.