CVE-2026-74736

CVE CVE-2026-74736EUVD EUVD-2026-66566Published 2026-08-26T14:36:49.000ZLast changed 2026-08-27T05:00:58.000ZCVSS 7.8

What the advisory describes

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.

Source: EUVD (ENISA), in the words of the advisory.

Products the advisory names

These come from the advisory itself, not from any check we performed.

Linux — Linux 2b3486bc2d237ec345b3942b7be5deabf8c8fed1 <ec5a552f4b2d841c6c021752450716e1a9676661; patch: 7.1.10; 2b3486bc2d237ec345b3942b7be5deabf8c8fed1 <daf546ab5763ce6a18280cb4db060e836c515301; patch: 6.12.105; 6.3; patch: 0; 2b3486bc2d237ec345b3942b7be5deabf8c8fed1 <adb3e7c26a51a10d94a241c6de7a81a2863dcacf; patch: 7.2; 2b3486bc2d237ec345b3942b7be5deabf8c8fed1 <120977e2c096deea4e866e4273be9220b957c29e; patch: 6.6.153; 2b3486bc2d237ec345b3942b7be5deabf8c8fed1 <5685bbbd3cbfbeb0de96a1d275a5ca073dfebb5e; patch: 6.18.46

The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.

Carried in the product catalogue

An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.

Linux — Linux

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