{"id":"CVE-2025-68725","revision":"e1d37c14a54c4b1b85094b315735e5a0","records":[{"revision":"e1d37c14a54c4b1b85094b315735e5a0","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2025-68725","aliases":[],"title":"bpf: Do not let BPF test infra emit invalid GSO types to stack","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Do not let BPF test infra emit invalid GSO types to stack\n\nYinhao et al. reported that their fuzzer tool was able to trigger a\nskb_warn_bad_offload() from netif_skb_features() -> gso_features_check().\nWhen a BPF program - triggered via BPF test infra - pushes the packet\nto the loopback device via bpf_clone_redirect() then mentioned offload\nwarning can be seen. GSO-related features are then rightfully disabled.\n\nWe get into this situation due to convert___skb_to_skb() setting\ngso_segs and gso_size but not gso_type. Technically, it makes sense\nthat this warning triggers since the GSO properties are malformed due\nto the gso_type. Potentially, the gso_type could be marked non-trustworthy\nthrough setting it at least to SKB_GSO_DODGY without any other specific\nassumptions, but that also feels wrong given we should not go further\ninto the GSO engine in the first place.\n\nThe checks were added in 121d57af308d (\"gso: validate gso_type in GSO\nhandlers\") because there were malicious (syzbot) senders that combine\na protocol with a non-matching gso_type. If we would want to drop such\npackets, gso_features_check() currently only returns feature flags via\nnetif_skb_features(), so one location for potentially dropping such skbs\ncould be validate_xmit_unreadable_skb(), but then otoh it would be\nan additional check in the fast-path for a very corner case. Given\nbpf_clone_redirect() is the only place where BPF test infra could emit\nsuch packets, lets reject them right there.","state":0,"publishedAt":"2025-12-24T10:33:09.61+00:00","modifiedAt":"2026-10-15T01:10:01.204+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"net/bpf/test_run.c\",\n                        \"net/core/filter.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"850a88cc4096fe1df407452ba2e4d28cf5b3eee9\",\n                            \"lessThan\": \"bb7902ed7d7f6d6a7c6c4dc25410d6127ce1085f\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"850a88cc4096fe1df407452ba2e4d28cf5b3eee9\",\n                            \"lessThan\": \"e0ffb64a2d72c6705b4a4c9efef600409f7e98a0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"850a88cc4096fe1df407452ba2e4d28cf5b3eee9\",\n                            \"lessThan\": \"768376ece7036ecb8604961793a1b72afe6345dd\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"850a88cc4096fe1df407452ba2e4d28cf5b3eee9\",\n                            \"lessThan\": \"8670b53b8ee91f028f7240531064020b7413c461\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"850a88cc4096fe1df407452ba2e4d28cf5b3eee9\",\n                            \"lessThan\": \"0f3a60869ca22024dfb9c6fce412b0c70cb4ea36\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"850a88cc4096fe1df407452ba2e4d28cf5b3eee9\",\n                            \"lessThan\": \"fbea4c63b5385588cb44ab21f91e55e33c719a54\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"850a88cc4096fe1df407452ba2e4d28cf5b3eee9\",\n                            \"lessThan\": \"04a899573fb87273a656f178b5f920c505f68875\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"net/bpf/test_run.c\",\n                        \"net/core/filter.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"5.6\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"5.6\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.249\",\n                            \"lessThanOrEqual\": \"5.10.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.199\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.162\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.122\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.68\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.2\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.19\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[],"references":["https://git.kernel.org/stable/c/bb7902ed7d7f6d6a7c6c4dc25410d6127ce1085f","https://git.kernel.org/stable/c/e0ffb64a2d72c6705b4a4c9efef600409f7e98a0","https://git.kernel.org/stable/c/768376ece7036ecb8604961793a1b72afe6345dd","https://git.kernel.org/stable/c/8670b53b8ee91f028f7240531064020b7413c461","https://git.kernel.org/stable/c/0f3a60869ca22024dfb9c6fce412b0c70cb4ea36","https://git.kernel.org/stable/c/fbea4c63b5385588cb44ab21f91e55e33c719a54","https://git.kernel.org/stable/c/04a899573fb87273a656f178b5f920c505f68875"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2025-68725","license":"CVE Program Terms of Use","key":"cve-program:CVE-2025-68725","identifiers":["CVE-2025-68725"]},"retained":false,"historicalAffected":[]}],"coverage":[]}