{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-40078","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2025-04-16T07:20:57.160Z","datePublished":"2025-10-28T11:48:43.548Z","dateUpdated":"2026-05-11T21:42:04.928Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-05-11T21:42:04.928Z"},"descriptions":[{"lang":"en","value":"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."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/core/filter.c"],"versions":[{"version":"1cedee13d25ab118d325f95588c1a084e9317229","lessThan":"de44cdc50d2dce8718cb57deddf9cf1be9a7759f","status":"affected","versionType":"git"},{"version":"1cedee13d25ab118d325f95588c1a084e9317229","lessThan":"76e04bbb4296fb6eac084dbfc27e02ccc744db3e","status":"affected","versionType":"git"},{"version":"1cedee13d25ab118d325f95588c1a084e9317229","lessThan":"6d8b1a21fd5c34622b0c3893c61e4a38d8ba53ec","status":"affected","versionType":"git"},{"version":"1cedee13d25ab118d325f95588c1a084e9317229","lessThan":"4f00858cd9bbbdf67159e28b85a8ca9e77c83622","status":"affected","versionType":"git"},{"version":"1cedee13d25ab118d325f95588c1a084e9317229","lessThan":"cdeafacb4f9ff261a96baef519e29480fd7b1019","status":"affected","versionType":"git"},{"version":"1cedee13d25ab118d325f95588c1a084e9317229","lessThan":"fe9d33f0470350558cb08cecb54cf2267b3a45d2","status":"affected","versionType":"git"},{"version":"1cedee13d25ab118d325f95588c1a084e9317229","lessThan":"ad8b4fe5617e3c85fc23267f02500c4f3bf0ff69","status":"affected","versionType":"git"},{"version":"1cedee13d25ab118d325f95588c1a084e9317229","lessThan":"6fabca2fc94d33cdf7ec102058983b086293395f","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/core/filter.c"],"versions":[{"version":"4.18","status":"affected"},{"version":"0","lessThan":"4.18","status":"unaffected","versionType":"semver"},{"version":"5.4.301","lessThanOrEqual":"5.4.*","status":"unaffected","versionType":"semver"},{"version":"5.10.246","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.195","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.156","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.112","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.53","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.17.3","lessThanOrEqual":"6.17.*","status":"unaffected","versionType":"semver"},{"version":"6.18","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.18","versionEndExcluding":"5.4.301"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.18","versionEndExcluding":"5.10.246"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.18","versionEndExcluding":"5.15.195"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.18","versionEndExcluding":"6.1.156"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.18","versionEndExcluding":"6.6.112"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.18","versionEndExcluding":"6.12.53"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.18","versionEndExcluding":"6.17.3"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.18","versionEndExcluding":"6.18"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/de44cdc50d2dce8718cb57deddf9cf1be9a7759f"},{"url":"https://git.kernel.org/stable/c/76e04bbb4296fb6eac084dbfc27e02ccc744db3e"},{"url":"https://git.kernel.org/stable/c/6d8b1a21fd5c34622b0c3893c61e4a38d8ba53ec"},{"url":"https://git.kernel.org/stable/c/4f00858cd9bbbdf67159e28b85a8ca9e77c83622"},{"url":"https://git.kernel.org/stable/c/cdeafacb4f9ff261a96baef519e29480fd7b1019"},{"url":"https://git.kernel.org/stable/c/fe9d33f0470350558cb08cecb54cf2267b3a45d2"},{"url":"https://git.kernel.org/stable/c/ad8b4fe5617e3c85fc23267f02500c4f3bf0ff69"},{"url":"https://git.kernel.org/stable/c/6fabca2fc94d33cdf7ec102058983b086293395f"}],"title":"bpf: Explicitly check accesses to bpf_sock_addr","x_generator":{"engine":"bippy-1.2.0"}}}}