{"api_version":"1","generated_at":"2026-06-25T11:33:12+00:00","cve":"CVE-2026-53269","urls":{"html":"https://cve.report/CVE-2026-53269","api":"https://cve.report/api/cve/CVE-2026-53269.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-53269","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-53269"},"summary":{"title":"netfilter: synproxy: add mutex to guard hook reference counting","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. 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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."}],"providerMetadata":{"dateUpdated":"2026-06-25T08:39:55.172Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/0ec9ddc1bda261a2c57636c74c8b4e53000102c9"},{"url":"https://git.kernel.org/stable/c/56ffbe3a08c01dcdb0d6adee9ce1e535bfb3b389"},{"url":"https://git.kernel.org/stable/c/debc57b83d5b323df74bf010c8d50fe26ad2ed6b"},{"url":"https://git.kernel.org/stable/c/0f8ba5e4c53d2e4a536aa68140beda9fe59b2f88"},{"url":"https://git.kernel.org/stable/c/640441348258220e78daed40528b85b8afcedab6"},{"url":"https://git.kernel.org/stable/c/aaf80701dc2f7a48fe543961e21f8ca3924d587c"},{"url":"https://git.kernel.org/stable/c/fbf0591275f50eae5733c3d7a8cd6c1e79933ffa"},{"url":"https://git.kernel.org/stable/c/2fcba19caaeb2a33017459d3430f057967bb91b6"}],"title":"netfilter: synproxy: add mutex to guard hook reference counting","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-53269","datePublished":"2026-06-25T08:39:55.172Z","dateReserved":"2026-06-09T07:44:35.395Z","dateUpdated":"2026-06-25T08:39:55.172Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-06-25 09:16:45","lastModifiedDate":"2026-06-25 09:16:45","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"53269","Ordinal":"1","Title":"netfilter: synproxy: add mutex to guard hook reference counting","CVE":"CVE-2026-53269","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"53269","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"netfilter: synproxy: add mutex to guard hook reference counting"}]}}}