{"cve":{"cve_id":"CVE-2026-53212","is_kev":false,"kev_date_added":null,"kev_vendor_project":null,"kev_product":null,"kev_vulnerability_name":null,"kev_short_description":null,"kev_required_action":null,"kev_due_date":null,"kev_known_ransomware":null,"kev_notes":null,"kev_cwes":null,"epss_score":null,"epss_percentile":null,"epss_as_of":null,"description":"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.","published_at":"2026-06-25T08:39:16.888000Z","last_modified_at":null,"cvss_v3_score":7.8,"cvss_v3_vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cvss_v3_severity":"HIGH","cvss_v4_score":null,"cvss_v4_vector":null,"cvss_v4_severity":null,"ssvc_decision":null,"ssvc_exploitation":null,"ssvc_automatable":null,"ssvc_technical_impact":null,"cwes":null,"nvd_references":["https://git.kernel.org/stable/c/349df61526d2e39decc685d246202e3e284cfe05","https://git.kernel.org/stable/c/55b79b1ae42372012413ce0413181d26679b17ef","https://git.kernel.org/stable/c/5e9ee18b27fde88cb6148202b33916c66693fe82","https://git.kernel.org/stable/c/8767fe4079affa74314d7eb3220e700150289842","https://git.kernel.org/stable/c/fda6573a46ad24f35348e024905ee5bdf729797e","https://git.kernel.org/stable/c/941d7394efda5e054e2d6f3e0dd0f6a9ba19aaa3","https://git.kernel.org/stable/c/f9a0e4b61054cde89a2a77845293c726cc07cc43","https://git.kernel.org/stable/c/c32b26aaa2f9216520a38b3f4bfeec846eb3eb8a"],"vuln_status":null,"trending_score":null,"is_trending":false,"has_trended":false,"trended_number_one":false,"trending_peak_score":null,"trending_peak_rank":null,"started_trending_at":null,"trended_number_one_at":null,"summary_generated":null,"summary_generated_at":null,"summary_model":null,"created_at":"2026-06-28T17:55:28.590503Z","updated_at":"2026-06-28T23:30:51.545322Z"},"effective_severity":"HIGH","badges":[],"impact_analysis":[],"cvss_v3_decoded":{"version":"3.1","metrics":[{"metric":"AV","name":"Attack Vector","value":"L","value_label":"Local"},{"metric":"AC","name":"Attack Complexity","value":"L","value_label":"Low"},{"metric":"PR","name":"Privileges Required","value":"L","value_label":"Low"},{"metric":"UI","name":"User Interaction","value":"N","value_label":"None"},{"metric":"S","name":"Scope","value":"U","value_label":"Unchanged"},{"metric":"C","name":"Confidentiality","value":"H","value_label":"High"},{"metric":"I","name":"Integrity","value":"H","value_label":"High"},{"metric":"A","name":"Availability","value":"H","value_label":"High"}]},"cvss_v4_decoded":{"version":null,"metrics":[]},"affected":[{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"af308b94a2a4a5a27bec9028354c4df444a7c8ba","version_start_inclusive":true,"version_end":"349df61526d2e39decc685d246202e3e284cfe05","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:af308b94a2a4a5a27bec9028354c4df444a7c8ba:349df61526d2e39decc685d246202e3e284cfe05"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"af308b94a2a4a5a27bec9028354c4df444a7c8ba","version_start_inclusive":true,"version_end":"55b79b1ae42372012413ce0413181d26679b17ef","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:af308b94a2a4a5a27bec9028354c4df444a7c8ba:55b79b1ae42372012413ce0413181d26679b17ef"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"af308b94a2a4a5a27bec9028354c4df444a7c8ba","version_start_inclusive":true,"version_end":"5e9ee18b27fde88cb6148202b33916c66693fe82","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:af308b94a2a4a5a27bec9028354c4df444a7c8ba:5e9ee18b27fde88cb6148202b33916c66693fe82"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"af308b94a2a4a5a27bec9028354c4df444a7c8ba","version_start_inclusive":true,"version_end":"8767fe4079affa74314d7eb3220e700150289842","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:af308b94a2a4a5a27bec9028354c4df444a7c8ba:8767fe4079affa74314d7eb3220e700150289842"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"af308b94a2a4a5a27bec9028354c4df444a7c8ba","version_start_inclusive":true,"version_end":"fda6573a46ad24f35348e024905ee5bdf729797e","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:af308b94a2a4a5a27bec9028354c4df444a7c8ba:fda6573a46ad24f35348e024905ee5bdf729797e"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"af308b94a2a4a5a27bec9028354c4df444a7c8ba","version_start_inclusive":true,"version_end":"941d7394efda5e054e2d6f3e0dd0f6a9ba19aaa3","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:af308b94a2a4a5a27bec9028354c4df444a7c8ba:941d7394efda5e054e2d6f3e0dd0f6a9ba19aaa3"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"af308b94a2a4a5a27bec9028354c4df444a7c8ba","version_start_inclusive":true,"version_end":"f9a0e4b61054cde89a2a77845293c726cc07cc43","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:af308b94a2a4a5a27bec9028354c4df444a7c8ba:f9a0e4b61054cde89a2a77845293c726cc07cc43"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"af308b94a2a4a5a27bec9028354c4df444a7c8ba","version_start_inclusive":true,"version_end":"c32b26aaa2f9216520a38b3f4bfeec846eb3eb8a","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:af308b94a2a4a5a27bec9028354c4df444a7c8ba:c32b26aaa2f9216520a38b3f4bfeec846eb3eb8a"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"4.19","version_start_inclusive":true,"version_end":"4.19","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:4.19:4.19"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"0","version_start_inclusive":true,"version_end":"4.19","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:0:4.19"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"5.10.259","version_start_inclusive":true,"version_end":"5.10.*","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:5.10.259:5.10.*"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"5.15.210","version_start_inclusive":true,"version_end":"5.15.*","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:5.15.210:5.15.*"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"6.1.176","version_start_inclusive":true,"version_end":"6.1.*","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:6.1.176:6.1.*"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"6.6.143","version_start_inclusive":true,"version_end":"6.6.*","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:6.6.143:6.6.*"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"6.12.94","version_start_inclusive":true,"version_end":"6.12.*","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:6.12.94:6.12.*"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"6.18.36","version_start_inclusive":true,"version_end":"6.18.*","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:6.18.36:6.18.*"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"7.0.13","version_start_inclusive":true,"version_end":"7.0.*","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:7.0.13:7.0.*"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"7.1","version_start_inclusive":true,"version_end":"*","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:7.1:*"}],"exploit_refs":[],"news":[],"references":[{"url":"https://git.kernel.org/stable/c/349df61526d2e39decc685d246202e3e284cfe05","source_type":"MISC","tags":[]},{"url":"https://git.kernel.org/stable/c/55b79b1ae42372012413ce0413181d26679b17ef","source_type":"MISC","tags":[]},{"url":"https://git.kernel.org/stable/c/5e9ee18b27fde88cb6148202b33916c66693fe82","source_type":"MISC","tags":[]},{"url":"https://git.kernel.org/stable/c/8767fe4079affa74314d7eb3220e700150289842","source_type":"MISC","tags":[]},{"url":"https://git.kernel.org/stable/c/fda6573a46ad24f35348e024905ee5bdf729797e","source_type":"MISC","tags":[]},{"url":"https://git.kernel.org/stable/c/941d7394efda5e054e2d6f3e0dd0f6a9ba19aaa3","source_type":"MISC","tags":[]},{"url":"https://git.kernel.org/stable/c/f9a0e4b61054cde89a2a77845293c726cc07cc43","source_type":"MISC","tags":[]},{"url":"https://git.kernel.org/stable/c/c32b26aaa2f9216520a38b3f4bfeec846eb3eb8a","source_type":"MISC","tags":[]}],"timeline":[{"type":"published","at":"2026-06-25T08:39:16.888000Z","label":"CVE published","source":null}]}