net/sched: cls_bpf: reject dev-bound programs bound to a different device
In the Linux kernel, the following vulnerability has been resolved: net/sched: cls_bpf: reject dev-bound programs bound to a different device cls_bpf_prog_from_efd() obtained a SCHED_CLS program via bpf_prog_get_type_dev() but never verified that a device-bound (offloaded) program's bound netdev matches the TC netdev the classifier is being attached to. This let a program loaded with prog_ifindex for device A be attached via cls_bpf + skip_sw to device B; deleting device A then destroyed the program's offload state while it was still attached to device B, triggering a netdevsim WARN (panic with panic_on_warn=1). Mirror the XDP attach path (net/core/dev.c) and reject the attach with -EINVAL when a dev-bound program's bound device does not match the target device.
CVE-2026-74736
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-2026-74736
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": "2b3486bc2d237ec345b3942b7be5deabf8c8fed1",
"lessThan": "ec5a552f4b2d841c6c021752450716e1a9676661",
"versionType": "git"
},
{
"status": "affected",
"version": "2b3486bc2d237ec345b3942b7be5deabf8c8fed1",
"lessThan": "daf546ab5763ce6a18280cb4db060e836c515301",
"versionType": "git"
},
{
"status": "affected",
"version": "2b3486bc2d237ec345b3942b7be5deabf8c8fed1",
"lessThan": "adb3e7c26a51a10d94a241c6de7a81a2863dcacf",
"versionType": "git"
},
{
"status": "affected",
"version": "2b3486bc2d237ec345b3942b7be5deabf8c8fed1",
"lessThan": "5685bbbd3cbfbeb0de96a1d275a5ca073dfebb5e",
"versionType": "git"
},
{
"status": "affected",
"version": "2b3486bc2d237ec345b3942b7be5deabf8c8fed1",
"lessThan": "120977e2c096deea4e866e4273be9220b957c29e",
"versionType": "git"
}
],
"programFiles": [
"net/sched/cls_bpf.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.3"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.3",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.153",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.105",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.46",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.1.10",
"versionType": "semver",
"lessThanOrEqual": "7.1.*"
},
{
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/sched/cls_bpf.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-74736
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #34287 · Revision 1
- Added to Heist Feed
- Publisher date