{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-53212", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-06-09T07:44:35.391Z", "datePublished": "2026-06-25T08:39:16.888Z", "dateUpdated": "2026-06-25T08:39:16.888Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-06-25T08:39:16.888Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nft_tunnel: fix use-after-free on object destroy\n\nnft_tunnel_obj_destroy() calls metadata_dst_free() which directly\nkfree()s the metadata_dst, ignoring the dst_entry refcount. Packets\nthat took a reference via dst_hold() in nft_tunnel_obj_eval() and\nare still queued (e.g. in a netem qdisc) are left with a dangling\npointer. When these packets are eventually dequeued, dst_release()\noperates on freed memory.\n\nReplace metadata_dst_free() with dst_release() so the metadata_dst\nis freed only after all references are dropped. The dst subsystem\nalready handles metadata_dst cleanup in dst_destroy() when\nDST_METADATA is set."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/netfilter/nft_tunnel.c"], "versions": [{"version": "af308b94a2a4a5a27bec9028354c4df444a7c8ba", "lessThan": "349df61526d2e39decc685d246202e3e284cfe05", "status": "affected", "versionType": "git"}, {"version": "af308b94a2a4a5a27bec9028354c4df444a7c8ba", "lessThan": "55b79b1ae42372012413ce0413181d26679b17ef", "status": "affected", "versionType": "git"}, {"version": "af308b94a2a4a5a27bec9028354c4df444a7c8ba", "lessThan": "5e9ee18b27fde88cb6148202b33916c66693fe82", "status": "affected", "versionType": "git"}, {"version": "af308b94a2a4a5a27bec9028354c4df444a7c8ba", "lessThan": "8767fe4079affa74314d7eb3220e700150289842", "status": "affected", "versionType": "git"}, {"version": "af308b94a2a4a5a27bec9028354c4df444a7c8ba", "lessThan": "fda6573a46ad24f35348e024905ee5bdf729797e", "status": "affected", "versionType": "git"}, {"version": "af308b94a2a4a5a27bec9028354c4df444a7c8ba", "lessThan": "941d7394efda5e054e2d6f3e0dd0f6a9ba19aaa3", "status": "affected", "versionType": "git"}, {"version": "af308b94a2a4a5a27bec9028354c4df444a7c8ba", "lessThan": "f9a0e4b61054cde89a2a77845293c726cc07cc43", "status": "affected", "versionType": "git"}, {"version": "af308b94a2a4a5a27bec9028354c4df444a7c8ba", "lessThan": "c32b26aaa2f9216520a38b3f4bfeec846eb3eb8a", "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/netfilter/nft_tunnel.c"], "versions": [{"version": "4.19", "status": "affected"}, {"version": "0", "lessThan": "4.19", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.259", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.210", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.176", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.143", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.94", "lessThanOrEqual": "6.12.*", "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": "4.19", "versionEndExcluding": "5.10.259"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.19", "versionEndExcluding": "5.15.210"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.19", "versionEndExcluding": "6.1.176"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.19", "versionEndExcluding": "6.6.143"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.19", "versionEndExcluding": "6.12.94"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.19", "versionEndExcluding": "6.18.36"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.19", "versionEndExcluding": "7.0.13"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.19", "versionEndExcluding": "7.1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/349df61526d2e39decc685d246202e3e284cfe05"}, {"url": "https://git.kernel.org/stable/c/55b79b1ae42372012413ce0413181d26679b17ef"}, {"url": "https://git.kernel.org/stable/c/5e9ee18b27fde88cb6148202b33916c66693fe82"}, {"url": "https://git.kernel.org/stable/c/8767fe4079affa74314d7eb3220e700150289842"}, {"url": "https://git.kernel.org/stable/c/fda6573a46ad24f35348e024905ee5bdf729797e"}, {"url": "https://git.kernel.org/stable/c/941d7394efda5e054e2d6f3e0dd0f6a9ba19aaa3"}, {"url": "https://git.kernel.org/stable/c/f9a0e4b61054cde89a2a77845293c726cc07cc43"}, {"url": "https://git.kernel.org/stable/c/c32b26aaa2f9216520a38b3f4bfeec846eb3eb8a"}], "title": "netfilter: nft_tunnel: fix use-after-free on object destroy", "x_generator": {"engine": "bippy-1.2.0"}}}}

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{"bugzilla": {"description": "kernel: netfilter: nft_tunnel: fix use-after-free on object destroy", "id": "2492847", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2492847"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-1341", "details": ["A flaw was found in the Linux kernel's netfilter component, specifically within the nft_tunnel module. This vulnerability occurs due to a use-after-free error when an object is destroyed, where memory is prematurely deallocated while still being referenced by queued network packets. This can lead to system instability or a denial of service (DoS) condition, as subsequent operations attempt to access freed memory."], "name": "CVE-2026-53212", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "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": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "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-2026-53212\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-53212\nhttps://lore.kernel.org/linux-cve-announce/2026062503-CVE-2026-53212-ce23@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[af308b94a2a4a5a27bec9028354c4df444a7c8ba,349df61526d2e39decc685d246202e3e284cfe05)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[af308b94a2a4a5a27bec9028354c4df444a7c8ba,55b79b1ae42372012413ce0413181d26679b17ef)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[af308b94a2a4a5a27bec9028354c4df444a7c8ba,5e9ee18b27fde88cb6148202b33916c66693fe82)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[af308b94a2a4a5a27bec9028354c4df444a7c8ba,8767fe4079affa74314d7eb3220e700150289842)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[af308b94a2a4a5a27bec9028354c4df444a7c8ba,fda6573a46ad24f35348e024905ee5bdf729797e)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[af308b94a2a4a5a27bec9028354c4df444a7c8ba,941d7394efda5e054e2d6f3e0dd0f6a9ba19aaa3)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[af308b94a2a4a5a27bec9028354c4df444a7c8ba,f9a0e4b61054cde89a2a77845293c726cc07cc43)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[af308b94a2a4a5a27bec9028354c4df444a7c8ba,c32b26aaa2f9216520a38b3f4bfeec846eb3eb8a)"}}], "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": "4.19"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,4.19)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.10.259,5.11.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.15.210,5.16.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.1.176,6.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.143,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.94,6.13.0)"}}, {"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": "2026-06-25T11:30:06.465198+00:00", "updated": "2026-06-26T05:45:04.994040+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}