{"api_version":"1","generated_at":"2026-08-15T08:44:36+00:00","cve":"CVE-2026-74406","urls":{"html":"https://cve.report/CVE-2026-74406","api":"https://cve.report/api/cve/CVE-2026-74406.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-74406","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-74406"},"summary":{"title":"vxlan: Fix potential null-ptr-deref in vxlan_gro_prepare_receive().","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nvxlan: Fix potential null-ptr-deref in vxlan_gro_prepare_receive().\n\nudp_tunnel_sock_release() could set sk->sk_user_data to NULL\nwhile vxlan_gro_prepare_receive() is running.\n\nLet's check if rcu_dereference_sk_user_data() is NULL after\nskb_gro_remcsum_init().","state":"PUBLISHED","assigner":"Linux","published_at":"2026-08-15 06:22:42","updated_at":"2026-08-15 06:22:42"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/ef44dac2a37f86eeae6b88ed10a6d60b35387dfd","name":"https://git.kernel.org/stable/c/ef44dac2a37f86eeae6b88ed10a6d60b35387dfd","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/30a45c0bffdd62350261e2f2689fdba426a33578","name":"https://git.kernel.org/stable/c/30a45c0bffdd62350261e2f2689fdba426a33578","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/08f40c0d23c67c3aa4224c3311e134999c721fb4","name":"https://git.kernel.org/stable/c/08f40c0d23c67c3aa4224c3311e134999c721fb4","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/f79c80f173fda9545b220c1f094b65fc06c252d0","name":"https://git.kernel.org/stable/c/f79c80f173fda9545b220c1f094b65fc06c252d0","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/4a8cde6f7281ea2c4c290f9ad9923b3631defceb","name":"https://git.kernel.org/stable/c/4a8cde6f7281ea2c4c290f9ad9923b3631defceb","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/9c58c729d32e7cea5772cc44929c6cd61e5a31cd","name":"https://git.kernel.org/stable/c/9c58c729d32e7cea5772cc44929c6cd61e5a31cd","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-74406","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-74406","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5602c48cf87562c2f95b831d690631935e834295 9c58c729d32e7cea5772cc44929c6cd61e5a31cd git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5602c48cf87562c2f95b831d690631935e834295 f79c80f173fda9545b220c1f094b65fc06c252d0 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5602c48cf87562c2f95b831d690631935e834295 08f40c0d23c67c3aa4224c3311e134999c721fb4 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5602c48cf87562c2f95b831d690631935e834295 4a8cde6f7281ea2c4c290f9ad9923b3631defceb git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5602c48cf87562c2f95b831d690631935e834295 ef44dac2a37f86eeae6b88ed10a6d60b35387dfd git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5602c48cf87562c2f95b831d690631935e834295 30a45c0bffdd62350261e2f2689fdba426a33578 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 4.7","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 4.7 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.178 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.145 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.97 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.40 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1.5 7.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2-rc1 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/net/vxlan/vxlan_core.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"9c58c729d32e7cea5772cc44929c6cd61e5a31cd","status":"affected","version":"5602c48cf87562c2f95b831d690631935e834295","versionType":"git"},{"lessThan":"f79c80f173fda9545b220c1f094b65fc06c252d0","status":"affected","version":"5602c48cf87562c2f95b831d690631935e834295","versionType":"git"},{"lessThan":"08f40c0d23c67c3aa4224c3311e134999c721fb4","status":"affected","version":"5602c48cf87562c2f95b831d690631935e834295","versionType":"git"},{"lessThan":"4a8cde6f7281ea2c4c290f9ad9923b3631defceb","status":"affected","version":"5602c48cf87562c2f95b831d690631935e834295","versionType":"git"},{"lessThan":"ef44dac2a37f86eeae6b88ed10a6d60b35387dfd","status":"affected","version":"5602c48cf87562c2f95b831d690631935e834295","versionType":"git"},{"lessThan":"30a45c0bffdd62350261e2f2689fdba426a33578","status":"affected","version":"5602c48cf87562c2f95b831d690631935e834295","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/net/vxlan/vxlan_core.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"4.7"},{"lessThan":"4.7","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.178","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.145","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.97","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.40","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.5","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.2-rc1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.178","versionStartIncluding":"4.7","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.145","versionStartIncluding":"4.7","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.97","versionStartIncluding":"4.7","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.40","versionStartIncluding":"4.7","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1.5","versionStartIncluding":"4.7","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2-rc1","versionStartIncluding":"4.7","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nvxlan: Fix potential null-ptr-deref in vxlan_gro_prepare_receive().\n\nudp_tunnel_sock_release() could set sk->sk_user_data to NULL\nwhile vxlan_gro_prepare_receive() is running.\n\nLet's check if rcu_dereference_sk_user_data() is NULL after\nskb_gro_remcsum_init()."}],"providerMetadata":{"dateUpdated":"2026-08-15T05:59:15.385Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/9c58c729d32e7cea5772cc44929c6cd61e5a31cd"},{"url":"https://git.kernel.org/stable/c/f79c80f173fda9545b220c1f094b65fc06c252d0"},{"url":"https://git.kernel.org/stable/c/08f40c0d23c67c3aa4224c3311e134999c721fb4"},{"url":"https://git.kernel.org/stable/c/4a8cde6f7281ea2c4c290f9ad9923b3631defceb"},{"url":"https://git.kernel.org/stable/c/ef44dac2a37f86eeae6b88ed10a6d60b35387dfd"},{"url":"https://git.kernel.org/stable/c/30a45c0bffdd62350261e2f2689fdba426a33578"}],"title":"vxlan: Fix potential null-ptr-deref in vxlan_gro_prepare_receive().","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-74406","datePublished":"2026-08-15T05:59:15.385Z","dateReserved":"2026-08-15T05:44:03.892Z","dateUpdated":"2026-08-15T05:59:15.385Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-15 06:22:42","lastModifiedDate":"2026-08-15 06:22:42","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"74406","Ordinal":"1","Title":"vxlan: Fix potential null-ptr-deref in vxlan_gro_prepare_receive","CVE":"CVE-2026-74406","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"74406","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nvxlan: Fix potential null-ptr-deref in vxlan_gro_prepare_receive().\n\nudp_tunnel_sock_release() could set sk->sk_user_data to NULL\nwhile vxlan_gro_prepare_receive() is running.\n\nLet's check if rcu_dereference_sk_user_data() is NULL after\nskb_gro_remcsum_init().","Type":"Description","Title":"vxlan: Fix potential null-ptr-deref in vxlan_gro_prepare_receive"}]}}}