CVE-2026-90146bpf, xdp: move offload check into dev_xdp_install()
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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().
- CVSS
- 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Oct 19, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 026a4c28e1db3b0cb99cd9a3e495d4a8b632fa74 before 486dbe7efec2be19cd3625be282f7f6b34a3f2c5; from 026a4c28e1db3b0cb99cd9a3e495d4a8b632fa74 before ea7b35dcc9430293b861bc7bad0c546f193c85f9; from 026a4c28e1db3b0cb99cd9a3e495d4a8b632fa74 before 03022dd874070768a7099f18b1944c633641315f; from 026a4c28e1db3b0cb99cd9a3e495d4a8b632fa74 before ad27ed7d2309419a129078d781504f486b1b469a | CNA record |
References
- https://git.kernel.org/stable/c/486dbe7efec2be19cd3625be282f7f6b34a3f2c5
- https://git.kernel.org/stable/c/ea7b35dcc9430293b861bc7bad0c546f193c85f9
- https://git.kernel.org/stable/c/03022dd874070768a7099f18b1944c633641315f
- https://git.kernel.org/stable/c/ad27ed7d2309419a129078d781504f486b1b469a
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.