{"cve":{"cve_id":"CVE-2026-53269","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: synproxy: add mutex to guard hook reference counting\n\nAs the synproxy infrastructure register netfilter hooks on-demand when a\nuser adds the first iptables target or nftables expression, if done\nconcurrently they can race each other.\n\nIntroduce a mutex to serialize the refcount control blocks access from\nboth frontends. While a per namespace mutex might be more efficient, it\nis not needed for target/expression like SYNPROXY.","published_at":"2026-06-25T08:39:55.172000Z","last_modified_at":null,"cvss_v3_score":null,"cvss_v3_vector":null,"cvss_v3_severity":null,"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/0ec9ddc1bda261a2c57636c74c8b4e53000102c9","https://git.kernel.org/stable/c/56ffbe3a08c01dcdb0d6adee9ce1e535bfb3b389","https://git.kernel.org/stable/c/debc57b83d5b323df74bf010c8d50fe26ad2ed6b","https://git.kernel.org/stable/c/0f8ba5e4c53d2e4a536aa68140beda9fe59b2f88","https://git.kernel.org/stable/c/640441348258220e78daed40528b85b8afcedab6","https://git.kernel.org/stable/c/aaf80701dc2f7a48fe543961e21f8ca3924d587c","https://git.kernel.org/stable/c/fbf0591275f50eae5733c3d7a8cd6c1e79933ffa","https://git.kernel.org/stable/c/2fcba19caaeb2a33017459d3430f057967bb91b6"],"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":null,"badges":[],"impact_analysis":[],"cvss_v3_decoded":{"version":null,"metrics":[]},"cvss_v4_decoded":{"version":null,"metrics":[]},"affected":[{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"ad49d86e07a497e834cb06f2b151dccd75f8e148","version_start_inclusive":true,"version_end":"0ec9ddc1bda261a2c57636c74c8b4e53000102c9","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:ad49d86e07a497e834cb06f2b151dccd75f8e148:0ec9ddc1bda261a2c57636c74c8b4e53000102c9"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"ad49d86e07a497e834cb06f2b151dccd75f8e148","version_start_inclusive":true,"version_end":"56ffbe3a08c01dcdb0d6adee9ce1e535bfb3b389","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:ad49d86e07a497e834cb06f2b151dccd75f8e148:56ffbe3a08c01dcdb0d6adee9ce1e535bfb3b389"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"ad49d86e07a497e834cb06f2b151dccd75f8e148","version_start_inclusive":true,"version_end":"debc57b83d5b323df74bf010c8d50fe26ad2ed6b","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:ad49d86e07a497e834cb06f2b151dccd75f8e148:debc57b83d5b323df74bf010c8d50fe26ad2ed6b"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"ad49d86e07a497e834cb06f2b151dccd75f8e148","version_start_inclusive":true,"version_end":"0f8ba5e4c53d2e4a536aa68140beda9fe59b2f88","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:ad49d86e07a497e834cb06f2b151dccd75f8e148:0f8ba5e4c53d2e4a536aa68140beda9fe59b2f88"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"ad49d86e07a497e834cb06f2b151dccd75f8e148","version_start_inclusive":true,"version_end":"640441348258220e78daed40528b85b8afcedab6","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:ad49d86e07a497e834cb06f2b151dccd75f8e148:640441348258220e78daed40528b85b8afcedab6"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"ad49d86e07a497e834cb06f2b151dccd75f8e148","version_start_inclusive":true,"version_end":"aaf80701dc2f7a48fe543961e21f8ca3924d587c","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:ad49d86e07a497e834cb06f2b151dccd75f8e148:aaf80701dc2f7a48fe543961e21f8ca3924d587c"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"ad49d86e07a497e834cb06f2b151dccd75f8e148","version_start_inclusive":true,"version_end":"fbf0591275f50eae5733c3d7a8cd6c1e79933ffa","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:ad49d86e07a497e834cb06f2b151dccd75f8e148:fbf0591275f50eae5733c3d7a8cd6c1e79933ffa"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"ad49d86e07a497e834cb06f2b151dccd75f8e148","version_start_inclusive":true,"version_end":"2fcba19caaeb2a33017459d3430f057967bb91b6","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:ad49d86e07a497e834cb06f2b151dccd75f8e148:2fcba19caaeb2a33017459d3430f057967bb91b6"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"5.3","version_start_inclusive":true,"version_end":"5.3","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:5.3:5.3"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"0","version_start_inclusive":true,"version_end":"5.3","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux: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published","source":null}]}