{"id":"CVE-2025-40078","revision":"526aa7be5d9442d09c00d8ec92295d78","records":[{"revision":"526aa7be5d9442d09c00d8ec92295d78","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2025-40078","aliases":[],"title":"bpf: Explicitly check accesses to bpf_sock_addr","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Explicitly check accesses to bpf_sock_addr\n\nSyzkaller found a kernel warning on the following sock_addr program:\n\n    0: r0 = 0\n    1: r2 = *(u32 *)(r1 +60)\n    2: exit\n\nwhich triggers:\n\n    verifier bug: error during ctx access conversion (0)\n\nThis is happening because offset 60 in bpf_sock_addr corresponds to an\nimplicit padding of 4 bytes, right after msg_src_ip4. Access to this\npadding isn't rejected in sock_addr_is_valid_access and it thus later\nfails to convert the access.\n\nThis patch fixes it by explicitly checking the various fields of\nbpf_sock_addr in sock_addr_is_valid_access.\n\nI checked the other ctx structures and is_valid_access functions and\ndidn't find any other similar cases. Other cases of (properly handled)\npadding are covered in new tests in a subsequent patch.","state":0,"publishedAt":"2025-10-28T11:48:43.548+00:00","modifiedAt":"2026-10-15T01:08:54.099+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/core/filter.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"1cedee13d25ab118d325f95588c1a084e9317229\",\n                            \"lessThan\": \"de44cdc50d2dce8718cb57deddf9cf1be9a7759f\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"1cedee13d25ab118d325f95588c1a084e9317229\",\n                            \"lessThan\": \"76e04bbb4296fb6eac084dbfc27e02ccc744db3e\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"1cedee13d25ab118d325f95588c1a084e9317229\",\n                            \"lessThan\": \"6d8b1a21fd5c34622b0c3893c61e4a38d8ba53ec\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"1cedee13d25ab118d325f95588c1a084e9317229\",\n                            \"lessThan\": \"4f00858cd9bbbdf67159e28b85a8ca9e77c83622\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"1cedee13d25ab118d325f95588c1a084e9317229\",\n                            \"lessThan\": \"cdeafacb4f9ff261a96baef519e29480fd7b1019\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"1cedee13d25ab118d325f95588c1a084e9317229\",\n                            \"lessThan\": \"fe9d33f0470350558cb08cecb54cf2267b3a45d2\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"1cedee13d25ab118d325f95588c1a084e9317229\",\n                            \"lessThan\": \"ad8b4fe5617e3c85fc23267f02500c4f3bf0ff69\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"1cedee13d25ab118d325f95588c1a084e9317229\",\n                            \"lessThan\": \"6fabca2fc94d33cdf7ec102058983b086293395f\",\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/core/filter.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"4.18\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"4.18\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.4.301\",\n                            \"lessThanOrEqual\": \"5.4.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.246\",\n                            \"lessThanOrEqual\": \"5.10.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.195\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.156\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.112\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.53\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.17.3\",\n                            \"lessThanOrEqual\": \"6.17.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[],"references":["https://git.kernel.org/stable/c/de44cdc50d2dce8718cb57deddf9cf1be9a7759f","https://git.kernel.org/stable/c/76e04bbb4296fb6eac084dbfc27e02ccc744db3e","https://git.kernel.org/stable/c/6d8b1a21fd5c34622b0c3893c61e4a38d8ba53ec","https://git.kernel.org/stable/c/4f00858cd9bbbdf67159e28b85a8ca9e77c83622","https://git.kernel.org/stable/c/cdeafacb4f9ff261a96baef519e29480fd7b1019","https://git.kernel.org/stable/c/fe9d33f0470350558cb08cecb54cf2267b3a45d2","https://git.kernel.org/stable/c/ad8b4fe5617e3c85fc23267f02500c4f3bf0ff69","https://git.kernel.org/stable/c/6fabca2fc94d33cdf7ec102058983b086293395f"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2025-40078","license":"CVE Program Terms of Use","key":"cve-program:CVE-2025-40078","identifiers":["CVE-2025-40078"]},"retained":false,"historicalAffected":[]}],"coverage":[]}