{"id":"CVE-2026-52985","state":"PUBLISHED","title":"netdevsim: zero initialize struct iphdr in dummy sk_buff","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetdevsim: zero initialize struct iphdr in dummy sk_buff\n\nSyzbot reports a KMSAN uninit-value originating from\nnsim_dev_trap_skb_build, with the allocation also\nbeing performed in the same function.\n\nFix this by calling skb_put_zero instead of skb_put to\nguarantee zero initialization of the whole IP header.","publishedAt":"2026-06-24T16:28:59.871Z","updatedAt":"2026-06-24T16:28:59.871Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"da58f90f11f597520f226caff1d3cfc115abedc9","status":"affected","lessThan":"175556c049eaec14efde8c6475e763b7579b9de7","versionType":"git"},{"version":"da58f90f11f597520f226caff1d3cfc115abedc9","status":"affected","lessThan":"6e2cfd0904976e701d7a76b86b694e72af230ab0","versionType":"git"},{"version":"da58f90f11f597520f226caff1d3cfc115abedc9","status":"affected","lessThan":"1b7b6ae0e93b8d512e208b1378d74af052e4f4e7","versionType":"git"},{"version":"da58f90f11f597520f226caff1d3cfc115abedc9","status":"affected","lessThan":"818f7673ed7f4a29d4b9cee8184c47d6e57162b4","versionType":"git"},{"version":"da58f90f11f597520f226caff1d3cfc115abedc9","status":"affected","lessThan":"978ca6ff789f1f19c03288ac20cc1f4774e88490","versionType":"git"},{"version":"da58f90f11f597520f226caff1d3cfc115abedc9","status":"affected","lessThan":"750d0091bebf44975421268d37484ef87060d263","versionType":"git"},{"version":"da58f90f11f597520f226caff1d3cfc115abedc9","status":"affected","lessThan":"bc6002865e8c4fcf9e94975f7cf023448d8764e2","versionType":"git"},{"version":"da58f90f11f597520f226caff1d3cfc115abedc9","status":"affected","lessThan":"35eaa6d8d6c2ee65e96f507add856e0eacf24591","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/netdevsim/dev.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.4","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.4","versionType":"semver"},{"version":"5.10.258","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.209","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.175","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.141","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.91","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.33","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.0.10","status":"unaffected","lessThanOrEqual":"7.0.*","versionType":"semver"},{"version":"7.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/netdevsim/dev.c"]}],"references":["https://git.kernel.org/stable/c/175556c049eaec14efde8c6475e763b7579b9de7","https://git.kernel.org/stable/c/6e2cfd0904976e701d7a76b86b694e72af230ab0","https://git.kernel.org/stable/c/1b7b6ae0e93b8d512e208b1378d74af052e4f4e7","https://git.kernel.org/stable/c/818f7673ed7f4a29d4b9cee8184c47d6e57162b4","https://git.kernel.org/stable/c/978ca6ff789f1f19c03288ac20cc1f4774e88490","https://git.kernel.org/stable/c/750d0091bebf44975421268d37484ef87060d263","https://git.kernel.org/stable/c/bc6002865e8c4fcf9e94975f7cf023448d8764e2","https://git.kernel.org/stable/c/35eaa6d8d6c2ee65e96f507add856e0eacf24591"],"weaknesses":[],"ingestedAt":"2026-10-29T20:12:16.098Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/52xxx/CVE-2026-52985.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-52985","state":"PUBLISHED","datePublished":"2026-06-24T16:28:59.871Z","dateUpdated":"2026-06-24T16:28:59.871Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-06-09T07:44:35.376Z"},"containers":{"cna":{"title":"netdevsim: zero initialize struct iphdr in dummy sk_buff","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetdevsim: zero initialize struct iphdr in dummy sk_buff\n\nSyzbot reports a KMSAN uninit-value originating from\nnsim_dev_trap_skb_build, with the allocation also\nbeing performed in the same function.\n\nFix this by calling skb_put_zero instead of skb_put to\nguarantee zero initialization of the whole IP header."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"da58f90f11f597520f226caff1d3cfc115abedc9","status":"affected","lessThan":"175556c049eaec14efde8c6475e763b7579b9de7","versionType":"git"},{"version":"da58f90f11f597520f226caff1d3cfc115abedc9","status":"affected","lessThan":"6e2cfd0904976e701d7a76b86b694e72af230ab0","versionType":"git"},{"version":"da58f90f11f597520f226caff1d3cfc115abedc9","status":"affected","lessThan":"1b7b6ae0e93b8d512e208b1378d74af052e4f4e7","versionType":"git"},{"version":"da58f90f11f597520f226caff1d3cfc115abedc9","status":"affected","lessThan":"818f7673ed7f4a29d4b9cee8184c47d6e57162b4","versionType":"git"},{"version":"da58f90f11f597520f226caff1d3cfc115abedc9","status":"affected","lessThan":"978ca6ff789f1f19c03288ac20cc1f4774e88490","versionType":"git"},{"version":"da58f90f11f597520f226caff1d3cfc115abedc9","status":"affected","lessThan":"750d0091bebf44975421268d37484ef87060d263","versionType":"git"},{"version":"da58f90f11f597520f226caff1d3cfc115abedc9","status":"affected","lessThan":"bc6002865e8c4fcf9e94975f7cf023448d8764e2","versionType":"git"},{"version":"da58f90f11f597520f226caff1d3cfc115abedc9","status":"affected","lessThan":"35eaa6d8d6c2ee65e96f507add856e0eacf24591","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/netdevsim/dev.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.4","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.4","versionType":"semver"},{"version":"5.10.258","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.209","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.175","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.141","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.91","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.33","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.0.10","status":"unaffected","lessThanOrEqual":"7.0.*","versionType":"semver"},{"version":"7.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/netdevsim/dev.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/175556c049eaec14efde8c6475e763b7579b9de7"},{"url":"https://git.kernel.org/stable/c/6e2cfd0904976e701d7a76b86b694e72af230ab0"},{"url":"https://git.kernel.org/stable/c/1b7b6ae0e93b8d512e208b1378d74af052e4f4e7"},{"url":"https://git.kernel.org/stable/c/818f7673ed7f4a29d4b9cee8184c47d6e57162b4"},{"url":"https://git.kernel.org/stable/c/978ca6ff789f1f19c03288ac20cc1f4774e88490"},{"url":"https://git.kernel.org/stable/c/750d0091bebf44975421268d37484ef87060d263"},{"url":"https://git.kernel.org/stable/c/bc6002865e8c4fcf9e94975f7cf023448d8764e2"},{"url":"https://git.kernel.org/stable/c/35eaa6d8d6c2ee65e96f507add856e0eacf24591"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-06-24T16:28:59.871Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.4","versionEndExcluding":"5.10.258"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.4","versionEndExcluding":"5.15.209"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.4","versionEndExcluding":"6.1.175"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.4","versionEndExcluding":"6.6.141"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.4","versionEndExcluding":"6.12.91"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.4","versionEndExcluding":"6.18.33"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.4","versionEndExcluding":"7.0.10"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.4","versionEndExcluding":"7.1"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}