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CVE PROGRAM SOURCE RECORD7.8 High

CVE-2026-74736

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

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Status
Published
Published
Updated
Assigning organization
Linux

Description

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • 2b3486bc2d237ec345b3942b7be5deabf8c8fed1 to < ec5a552f4b2d841c6c021752450716e1a9676661affected
  • 2b3486bc2d237ec345b3942b7be5deabf8c8fed1 to < daf546ab5763ce6a18280cb4db060e836c515301affected
  • 2b3486bc2d237ec345b3942b7be5deabf8c8fed1 to < adb3e7c26a51a10d94a241c6de7a81a2863dcacfaffected
  • 2b3486bc2d237ec345b3942b7be5deabf8c8fed1 to < 5685bbbd3cbfbeb0de96a1d275a5ca073dfebb5eaffected
  • 2b3486bc2d237ec345b3942b7be5deabf8c8fed1 to < 120977e2c096deea4e866e4273be9220b957c29eaffected

Linux Linux

Default version status: affected

  • 6.3affected
  • 0 to < 6.3unaffected
  • 6.6.153 to ≤ 6.6.*unaffected
  • 6.12.105 to ≤ 6.12.*unaffected
  • 6.18.46 to ≤ 6.18.*unaffected
  • 7.1.10 to ≤ 7.1.*unaffected
  • 7.2 to ≤ *unaffected

References