CVE-2026-90146

HighCVSS 7.8/10Last modified Oct 30, 2026

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().

Metrics

CVSS 3.1 7.8/10CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected software

Source: the vendor's advisory (CNA). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 026a4c28e1db3b0cb99cd9a3e495d4a8b632fa74, < 4a0467819bc2423be8fc4c9834e8f42af2af0861; >= 026a4c28e1db3b0cb99cd9a3e495d4a8b632fa74, < bd06033625ec20b7bdec43d21f776fc1a5e9000e; >= 026a4c28e1db3b0cb99cd9a3e495d4a8b632fa74, < 486dbe7efec2be19cd3625be282f7f6b34a3f2c5; >= 026a4c28e1db3b0cb99cd9a3e495d4a8b632fa74, < f14b774ec9bd52d0f4ec29a6597a35fd107197f9; >= 026a4c28e1db3b0cb99cd9a3e495d4a8b632fa74, < ea7b35dcc9430293b861bc7bad0c546f193c85f9; >= 026a4c28e1db3b0cb99cd9a3e495d4a8b632fa74, < 03022dd874070768a7099f18b1944c633641315f; >= 026a4c28e1db3b0cb99cd9a3e495d4a8b632fa74, < ad27ed7d2309419a129078d781504f486b1b469a
LinuxLinux5.9

References

Timeline

Published
Sep 17, 2026
Last modified
Oct 30, 2026
NVD status
Received

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CVE-2026-90146: High severity, CVSS 7.8 | Vulnix