bpf, xdp: move offload check into dev_xdp_install()
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().
CVE-2026-90146
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-90146
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "026a4c28e1db3b0cb99cd9a3e495d4a8b632fa74",
"lessThan": "bd06033625ec20b7bdec43d21f776fc1a5e9000e",
"versionType": "git"
},
{
"status": "affected",
"version": "026a4c28e1db3b0cb99cd9a3e495d4a8b632fa74",
"lessThan": "486dbe7efec2be19cd3625be282f7f6b34a3f2c5",
"versionType": "git"
},
{
"status": "affected",
"version": "026a4c28e1db3b0cb99cd9a3e495d4a8b632fa74",
"lessThan": "f14b774ec9bd52d0f4ec29a6597a35fd107197f9",
"versionType": "git"
},
{
"status": "affected",
"version": "026a4c28e1db3b0cb99cd9a3e495d4a8b632fa74",
"lessThan": "ea7b35dcc9430293b861bc7bad0c546f193c85f9",
"versionType": "git"
},
{
"status": "affected",
"version": "026a4c28e1db3b0cb99cd9a3e495d4a8b632fa74",
"lessThan": "03022dd874070768a7099f18b1944c633641315f",
"versionType": "git"
},
{
"status": "affected",
"version": "026a4c28e1db3b0cb99cd9a3e495d4a8b632fa74",
"lessThan": "ad27ed7d2309419a129078d781504f486b1b469a",
"versionType": "git"
}
],
"programFiles": [
"net/core/dev.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.9"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.9",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.160",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.113",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.12.114",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.52",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.6",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/core/dev.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-90146
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #48614 · Revision 1
- Added to Heist Feed
- Publisher date