{"api_version":"1","generated_at":"2026-06-25T11:33:50+00:00","cve":"CVE-2026-53211","urls":{"html":"https://cve.report/CVE-2026-53211","api":"https://cve.report/api/cve/CVE-2026-53211.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-53211","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-53211"},"summary":{"title":"netfilter: nft_meta_bridge: fix stale stack leak via IIFHWADDR register","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nft_meta_bridge: fix stale stack leak via IIFHWADDR register\n\nNFT_META_BRI_IIFHWADDR declares its destination register with\nlen = ETH_ALEN (6 bytes), which the register-init tracking rounds up to\ntwo 32-bit registers (8 bytes). nft_meta_bridge_get_eval() then does\nmemcpy(dest, br_dev->dev_addr, ETH_ALEN), writing only 6 bytes and\nleaving the upper 2 bytes of the second register as uninitialised\nnft_do_chain() stack. A downstream load of that register span leaks\nthose stale bytes to userspace.\n\nZero the second register before the memcpy so the full declared span is\nwritten.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-06-25 09:16:38","updated_at":"2026-06-25 09:16:38"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/f1e81d571e375d10e50e852223593493d98c1bac","name":"https://git.kernel.org/stable/c/f1e81d571e375d10e50e852223593493d98c1bac","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/07acb9798477535933bd658ac9fa85b6cb10d995","name":"https://git.kernel.org/stable/c/07acb9798477535933bd658ac9fa85b6cb10d995","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/c7d573551f9286100a055ef696cde6af54549677","name":"https://git.kernel.org/stable/c/c7d573551f9286100a055ef696cde6af54549677","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-53211","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-53211","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected cbd2257dc96e3e46217540fcb095a757ffa20d96 07acb9798477535933bd658ac9fa85b6cb10d995 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected cbd2257dc96e3e46217540fcb095a757ffa20d96 f1e81d571e375d10e50e852223593493d98c1bac git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected cbd2257dc96e3e46217540fcb095a757ffa20d96 c7d573551f9286100a055ef696cde6af54549677 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.18","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.36 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.0.13 7.0.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1 * 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":["net/bridge/netfilter/nft_meta_bridge.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"07acb9798477535933bd658ac9fa85b6cb10d995","status":"affected","version":"cbd2257dc96e3e46217540fcb095a757ffa20d96","versionType":"git"},{"lessThan":"f1e81d571e375d10e50e852223593493d98c1bac","status":"affected","version":"cbd2257dc96e3e46217540fcb095a757ffa20d96","versionType":"git"},{"lessThan":"c7d573551f9286100a055ef696cde6af54549677","status":"affected","version":"cbd2257dc96e3e46217540fcb095a757ffa20d96","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["net/bridge/netfilter/nft_meta_bridge.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.18"},{"lessThan":"6.18","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.36","versionType":"semver"},{"lessThanOrEqual":"7.0.*","status":"unaffected","version":"7.0.13","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.36","versionStartIncluding":"6.18","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.0.13","versionStartIncluding":"6.18","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1","versionStartIncluding":"6.18","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nft_meta_bridge: fix stale stack leak via IIFHWADDR register\n\nNFT_META_BRI_IIFHWADDR declares its destination register with\nlen = ETH_ALEN (6 bytes), which the register-init tracking rounds up to\ntwo 32-bit registers (8 bytes). nft_meta_bridge_get_eval() then does\nmemcpy(dest, br_dev->dev_addr, ETH_ALEN), writing only 6 bytes and\nleaving the upper 2 bytes of the second register as uninitialised\nnft_do_chain() stack. A downstream load of that register span leaks\nthose stale bytes to userspace.\n\nZero the second register before the memcpy so the full declared span is\nwritten."}],"providerMetadata":{"dateUpdated":"2026-06-25T08:39:16.234Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/07acb9798477535933bd658ac9fa85b6cb10d995"},{"url":"https://git.kernel.org/stable/c/f1e81d571e375d10e50e852223593493d98c1bac"},{"url":"https://git.kernel.org/stable/c/c7d573551f9286100a055ef696cde6af54549677"}],"title":"netfilter: nft_meta_bridge: fix stale stack leak via IIFHWADDR register","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-53211","datePublished":"2026-06-25T08:39:16.234Z","dateReserved":"2026-06-09T07:44:35.391Z","dateUpdated":"2026-06-25T08:39:16.234Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-06-25 09:16:38","lastModifiedDate":"2026-06-25 09:16:38","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"53211","Ordinal":"1","Title":"netfilter: nft_meta_bridge: fix stale stack leak via IIFHWADDR r","CVE":"CVE-2026-53211","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"53211","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nft_meta_bridge: fix stale stack leak via IIFHWADDR register\n\nNFT_META_BRI_IIFHWADDR declares its destination register with\nlen = ETH_ALEN (6 bytes), which the register-init tracking rounds up to\ntwo 32-bit registers (8 bytes). nft_meta_bridge_get_eval() then does\nmemcpy(dest, br_dev->dev_addr, ETH_ALEN), writing only 6 bytes and\nleaving the upper 2 bytes of the second register as uninitialised\nnft_do_chain() stack. A downstream load of that register span leaks\nthose stale bytes to userspace.\n\nZero the second register before the memcpy so the full declared span is\nwritten.","Type":"Description","Title":"netfilter: nft_meta_bridge: fix stale stack leak via IIFHWADDR r"}]}}}