{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-53269", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-06-09T07:44:35.395Z", "datePublished": "2026-06-25T08:39:55.172Z", "dateUpdated": "2026-06-25T08:39:55.172Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-06-25T08:39:55.172Z"}, "descriptions": [{"lang": "en", "value": "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."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/netfilter/nf_synproxy_core.c"], "versions": [{"version": "ad49d86e07a497e834cb06f2b151dccd75f8e148", "lessThan": "0ec9ddc1bda261a2c57636c74c8b4e53000102c9", "status": "affected", "versionType": "git"}, {"version": "ad49d86e07a497e834cb06f2b151dccd75f8e148", "lessThan": "56ffbe3a08c01dcdb0d6adee9ce1e535bfb3b389", "status": "affected", "versionType": "git"}, {"version": "ad49d86e07a497e834cb06f2b151dccd75f8e148", "lessThan": "debc57b83d5b323df74bf010c8d50fe26ad2ed6b", "status": "affected", "versionType": "git"}, {"version": "ad49d86e07a497e834cb06f2b151dccd75f8e148", "lessThan": "0f8ba5e4c53d2e4a536aa68140beda9fe59b2f88", "status": "affected", "versionType": "git"}, {"version": "ad49d86e07a497e834cb06f2b151dccd75f8e148", "lessThan": "640441348258220e78daed40528b85b8afcedab6", "status": "affected", "versionType": "git"}, {"version": "ad49d86e07a497e834cb06f2b151dccd75f8e148", "lessThan": "aaf80701dc2f7a48fe543961e21f8ca3924d587c", "status": "affected", "versionType": "git"}, {"version": "ad49d86e07a497e834cb06f2b151dccd75f8e148", "lessThan": "fbf0591275f50eae5733c3d7a8cd6c1e79933ffa", "status": "affected", "versionType": "git"}, {"version": "ad49d86e07a497e834cb06f2b151dccd75f8e148", "lessThan": "2fcba19caaeb2a33017459d3430f057967bb91b6", "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/nf_synproxy_core.c"], "versions": [{"version": "5.3", "status": "affected"}, {"version": "0", "lessThan": "5.3", "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": "5.3", "versionEndExcluding": "5.10.259"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.3", "versionEndExcluding": "5.15.210"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.3", "versionEndExcluding": "6.1.176"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.3", "versionEndExcluding": "6.6.143"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.3", "versionEndExcluding": "6.12.94"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.3", "versionEndExcluding": "6.18.36"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.3", "versionEndExcluding": "7.0.13"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.3", "versionEndExcluding": "7.1"}]}]}], "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"}}}}

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