Linux Kernel netlink Vulnerability Rated 7.8 CVSS

Last refreshed2026-10-15

Status: UPDATED | Advisory ID: CVE-2026-90146

Key Details

CVE	CVE-2026-90146
CVSS Score / Version	7.8 (High) / CVSS v3.1
Updated	2026-10-15
CVSS Vector	`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`
CVSS Prose	attack vector is local; attack complexity is low; privileges required is low; user interaction is none; scope is unchanged; confidentiality impact is high; integrity impact is high; availability impact is high.
Affected products	Linux Kernel
Exploitation prediction (EPSS)	0.17% probability of exploitation in the next 30 days (6% percentile) -- FIRST.org's EPSS model.

Vendor	Product	Affected Versions	Patch Status
Linux	Linux Kernel

Vendor

Product

Affected Versions

Patch Status

Linux

Linux Kernel

Subsystems	OT Supporting Infrastructure
Sectors	All Sectors

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(). (NVD)

Monitor Linux's web page for any future patch releases.

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2026-90146
CVE	https://www.cve.org/CVERecord?id=CVE-2026-90146

Source

Reference

NVD

CVE