{"id":"CVE-2026-74736","summary":"net/sched: cls_bpf: reject dev-bound programs bound to a different device","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet/sched: cls_bpf: reject dev-bound programs bound to a different device\n\ncls_bpf_prog_from_efd() obtained a SCHED_CLS program via\nbpf_prog_get_type_dev() but never verified that a device-bound (offloaded)\nprogram's bound netdev matches the TC netdev the classifier is being\nattached to. This let a program loaded with prog_ifindex for device A be\nattached via cls_bpf + skip_sw to device B; deleting device A then\ndestroyed the program's offload state while it was still attached to\ndevice B, triggering a netdevsim WARN (panic with panic_on_warn=1).\n\nMirror the XDP attach path (net/core/dev.c) and reject the attach with\n-EINVAL when a dev-bound program's bound device does not match the\ntarget device.","modified":"2026-08-28T03:47:18.086348867Z","published":"2026-08-26T14:36:49.950Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74736.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/120977e2c096deea4e866e4273be9220b957c29e"},{"type":"WEB","url":"https://git.kernel.org/stable/c/5685bbbd3cbfbeb0de96a1d275a5ca073dfebb5e"},{"type":"WEB","url":"https://git.kernel.org/stable/c/adb3e7c26a51a10d94a241c6de7a81a2863dcacf"},{"type":"WEB","url":"https://git.kernel.org/stable/c/daf546ab5763ce6a18280cb4db060e836c515301"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ec5a552f4b2d841c6c021752450716e1a9676661"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74736.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-74736"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"2b3486bc2d237ec345b3942b7be5deabf8c8fed1"},{"fixed":"ec5a552f4b2d841c6c021752450716e1a9676661"},{"fixed":"daf546ab5763ce6a18280cb4db060e836c515301"},{"fixed":"adb3e7c26a51a10d94a241c6de7a81a2863dcacf"},{"fixed":"5685bbbd3cbfbeb0de96a1d275a5ca073dfebb5e"},{"fixed":"120977e2c096deea4e866e4273be9220b957c29e"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-74736.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.3.0"},{"fixed":"6.6.153"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.105"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.46"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.1.10"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-74736.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}