High 7.8Published Aug 26, 2026

CVE-2026-74736net/sched: cls_bpf: reject dev-bound programs bound to a different device

Updated under an hour ago (2026-10-19 10:23 UTC)

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No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

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.

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 16, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from 2b3486bc2d237ec345b3942b7be5deabf8c8fed1 before ec5a552f4b2d841c6c021752450716e1a9676661; from 2b3486bc2d237ec345b3942b7be5deabf8c8fed1 before daf546ab5763ce6a18280cb4db060e836c515301; from 2b3486bc2d237ec345b3942b7be5deabf8c8fed1 before adb3e7c26a51a10d94a241c6de7a81a2863dcacf; from 2b3486bc2d237ec345b3942b7be5deabf8c8fed1 before 5685bbbd3cbfbeb0de96a1d275a5ca073dfebb5e; from 2b3486bc2d237ec345b3942b7be5deabf8c8fed1 before 120977e2c096deea4e866e4273be9220b957c29e	CNA record

References

https://git.kernel.org/stable/c/ec5a552f4b2d841c6c021752450716e1a9676661
https://git.kernel.org/stable/c/daf546ab5763ce6a18280cb4db060e836c515301
https://git.kernel.org/stable/c/adb3e7c26a51a10d94a241c6de7a81a2863dcacf
https://git.kernel.org/stable/c/5685bbbd3cbfbeb0de96a1d275a5ca073dfebb5e
https://git.kernel.org/stable/c/120977e2c096deea4e866e4273be9220b957c29e

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.