{"id":"CVE-2025-38432","state":"PUBLISHED","title":"net: netpoll: Initialize UDP checksum field before checksumming","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: netpoll: Initialize UDP checksum field before checksumming\n\ncommit f1fce08e63fe (\"netpoll: Eliminate redundant assignment\") removed\nthe initialization of the UDP checksum, which was wrong and broke\nnetpoll IPv6 transmission due to bad checksumming.\n\nudph->check needs to be set before calling csum_ipv6_magic().","publishedAt":"2025-07-25T14:24:13.766Z","updatedAt":"2026-05-11T21:27:52.609Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"f1fce08e63fe1a2a8b8106b93b7244a39830edae","status":"affected","lessThan":"353016ec159f939a380ff6746476a779367ba9a3","versionType":"git"},{"version":"f1fce08e63fe1a2a8b8106b93b7244a39830edae","status":"affected","lessThan":"f5990207026987a353d5a95204c4d9cb725637fd","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/core/netpoll.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.15","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.15","versionType":"semver"},{"version":"6.15.5","status":"unaffected","lessThanOrEqual":"6.15.*","versionType":"semver"},{"version":"6.16","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/core/netpoll.c"]}],"references":["https://git.kernel.org/stable/c/353016ec159f939a380ff6746476a779367ba9a3","https://git.kernel.org/stable/c/f5990207026987a353d5a95204c4d9cb725637fd"],"weaknesses":[],"ingestedAt":"2026-10-29T20:09:09.358Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2025/38xxx/CVE-2025-38432.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-38432","state":"PUBLISHED","datePublished":"2025-07-25T14:24:13.766Z","dateUpdated":"2026-05-11T21:27:52.609Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2025-04-16T04:51:24.015Z"},"containers":{"cna":{"title":"net: netpoll: Initialize UDP checksum field before checksumming","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: netpoll: Initialize UDP checksum field before checksumming\n\ncommit f1fce08e63fe (\"netpoll: Eliminate redundant assignment\") removed\nthe initialization of the UDP checksum, which was wrong and broke\nnetpoll IPv6 transmission due to bad checksumming.\n\nudph->check needs to be set before calling csum_ipv6_magic()."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"f1fce08e63fe1a2a8b8106b93b7244a39830edae","status":"affected","lessThan":"353016ec159f939a380ff6746476a779367ba9a3","versionType":"git"},{"version":"f1fce08e63fe1a2a8b8106b93b7244a39830edae","status":"affected","lessThan":"f5990207026987a353d5a95204c4d9cb725637fd","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/core/netpoll.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.15","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.15","versionType":"semver"},{"version":"6.15.5","status":"unaffected","lessThanOrEqual":"6.15.*","versionType":"semver"},{"version":"6.16","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/core/netpoll.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/353016ec159f939a380ff6746476a779367ba9a3"},{"url":"https://git.kernel.org/stable/c/f5990207026987a353d5a95204c4d9cb725637fd"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T21:27:52.609Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.15","versionEndExcluding":"6.15.5"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.15","versionEndExcluding":"6.16"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}