{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-53211", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-06-09T07:44:35.391Z", "datePublished": "2026-06-25T08:39:16.234Z", "dateUpdated": "2026-06-25T08:39:16.234Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-06-25T08:39:16.234Z"}, "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."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/bridge/netfilter/nft_meta_bridge.c"], "versions": [{"version": "cbd2257dc96e3e46217540fcb095a757ffa20d96", "lessThan": "07acb9798477535933bd658ac9fa85b6cb10d995", "status": "affected", "versionType": "git"}, {"version": "cbd2257dc96e3e46217540fcb095a757ffa20d96", "lessThan": "f1e81d571e375d10e50e852223593493d98c1bac", "status": "affected", "versionType": "git"}, {"version": "cbd2257dc96e3e46217540fcb095a757ffa20d96", "lessThan": "c7d573551f9286100a055ef696cde6af54549677", "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/bridge/netfilter/nft_meta_bridge.c"], "versions": [{"version": "6.18", "status": "affected"}, {"version": "0", "lessThan": "6.18", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.36", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0.13", "lessThanOrEqual": "7.0.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1", "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": "6.18", "versionEndExcluding": "6.18.36"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.18", "versionEndExcluding": "7.0.13"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.18", "versionEndExcluding": "7.1"}]}]}], "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"}}}}

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{"bugzilla": {"description": "kernel: netfilter: nft_meta_bridge: fix stale stack leak via IIFHWADDR register", "id": "2492752", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2492752"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-131", "details": ["A flaw was found in the Linux kernel's netfilter component, specifically in nft_meta_bridge. The NFT_META_BRI_IIFHWADDR register, intended for hardware address storage, is declared with a length of 6 bytes but is tracked as 8 bytes during initialization. When nft_meta_bridge_get_eval() writes to this register, only 6 bytes are written, leaving 2 bytes uninitialized. A subsequent operation that loads this register can leak these uninitialized stale stack bytes to userspace, leading to information disclosure."], "name": "CVE-2026-53211", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-06-25T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-53211\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-53211\nhttps://lore.kernel.org/linux-cve-announce/2026062503-CVE-2026-53211-844b@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[cbd2257dc96e3e46217540fcb095a757ffa20d96,07acb9798477535933bd658ac9fa85b6cb10d995)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[cbd2257dc96e3e46217540fcb095a757ffa20d96,f1e81d571e375d10e50e852223593493d98c1bac)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[cbd2257dc96e3e46217540fcb095a757ffa20d96,c7d573551f9286100a055ef696cde6af54549677)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "6.18"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,6.18)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.36,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.0.13,7.1.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.1,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-06-25T12:00:14.023901+00:00", "updated": "2026-06-26T15:45:02.973613+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}