{"id":"CVE-2022-49183","state":"PUBLISHED","title":"net/sched: act_ct: fix ref leak when switching zones","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet/sched: act_ct: fix ref leak when switching zones\n\nWhen switching zones or network namespaces without doing a ct clear in\nbetween, it is now leaking a reference to the old ct entry. That's\nbecause tcf_ct_skb_nfct_cached() returns false and\ntcf_ct_flow_table_lookup() may simply overwrite it.\n\nThe fix is to, as the ct entry is not reusable, free it already at\ntcf_ct_skb_nfct_cached().","publishedAt":"2025-02-26T01:55:34.041Z","updatedAt":"2026-06-01T16:03:48.869Z","severity":{"score":5.5,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","source":"CISA-ADP"},"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"0fc1847359964e95e521cf2bb2b10f8e33dd0970","status":"affected","lessThan":"9222a08be539cbb7a8e0d46cbc7ab9e4db273eb8","versionType":"git"},{"version":"a95ea90deb3071c1ded77a05e91cfebc5238d908","status":"affected","lessThan":"bcbf4e5c3b5b373cd61528392dd1ec8e9c0fd33d","versionType":"git"},{"version":"e9408de00e5ecd0dbe91cf061c7da23711c4febb","status":"affected","lessThan":"4bb42d73def9411e5cad885b9811987d72431df1","versionType":"git"},{"version":"2f131de361f6d0eaff17db26efdb844c178432f8","status":"affected","lessThan":"b24793a37d91aacad7cb9893b226a7924a89636a","versionType":"git"},{"version":"2f131de361f6d0eaff17db26efdb844c178432f8","status":"affected","lessThan":"bcb74e132a76ce0502bb33d5b65533a4ed72d159","versionType":"git"},{"version":"5.10.103","status":"affected","lessThan":"5.10.258","versionType":"semver"},{"version":"5.15.26","status":"affected","lessThan":"5.15.33","versionType":"semver"},{"version":"5.16.12","status":"affected","lessThan":"5.16.19","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/sched/act_ct.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.17","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.17","versionType":"semver"},{"version":"5.10.258","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.33","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"5.16.19","status":"unaffected","lessThanOrEqual":"5.16.*","versionType":"semver"},{"version":"5.17.2","status":"unaffected","lessThanOrEqual":"5.17.*","versionType":"semver"},{"version":"5.18","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/sched/act_ct.c"]}],"references":["https://git.kernel.org/stable/c/9222a08be539cbb7a8e0d46cbc7ab9e4db273eb8","https://git.kernel.org/stable/c/bcbf4e5c3b5b373cd61528392dd1ec8e9c0fd33d","https://git.kernel.org/stable/c/4bb42d73def9411e5cad885b9811987d72431df1","https://git.kernel.org/stable/c/b24793a37d91aacad7cb9893b226a7924a89636a","https://git.kernel.org/stable/c/bcb74e132a76ce0502bb33d5b65533a4ed72d159"],"weaknesses":[],"ingestedAt":"2026-10-29T20:05:26.763Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2022/49xxx/CVE-2022-49183.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2022-49183","state":"PUBLISHED","datePublished":"2025-02-26T01:55:34.041Z","dateUpdated":"2026-06-01T16:03:48.869Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2025-02-26T01:49:39.283Z"},"containers":{"cna":{"title":"net/sched: act_ct: fix ref leak when switching zones","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet/sched: act_ct: fix ref leak when switching zones\n\nWhen switching zones or network namespaces without doing a ct clear in\nbetween, it is now leaking a reference to the old ct entry. That's\nbecause tcf_ct_skb_nfct_cached() returns false and\ntcf_ct_flow_table_lookup() may simply overwrite it.\n\nThe fix is to, as the ct entry is not reusable, free it already at\ntcf_ct_skb_nfct_cached()."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"0fc1847359964e95e521cf2bb2b10f8e33dd0970","status":"affected","lessThan":"9222a08be539cbb7a8e0d46cbc7ab9e4db273eb8","versionType":"git"},{"version":"a95ea90deb3071c1ded77a05e91cfebc5238d908","status":"affected","lessThan":"bcbf4e5c3b5b373cd61528392dd1ec8e9c0fd33d","versionType":"git"},{"version":"e9408de00e5ecd0dbe91cf061c7da23711c4febb","status":"affected","lessThan":"4bb42d73def9411e5cad885b9811987d72431df1","versionType":"git"},{"version":"2f131de361f6d0eaff17db26efdb844c178432f8","status":"affected","lessThan":"b24793a37d91aacad7cb9893b226a7924a89636a","versionType":"git"},{"version":"2f131de361f6d0eaff17db26efdb844c178432f8","status":"affected","lessThan":"bcb74e132a76ce0502bb33d5b65533a4ed72d159","versionType":"git"},{"version":"5.10.103","status":"affected","lessThan":"5.10.258","versionType":"semver"},{"version":"5.15.26","status":"affected","lessThan":"5.15.33","versionType":"semver"},{"version":"5.16.12","status":"affected","lessThan":"5.16.19","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/sched/act_ct.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.17","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.17","versionType":"semver"},{"version":"5.10.258","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.33","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"5.16.19","status":"unaffected","lessThanOrEqual":"5.16.*","versionType":"semver"},{"version":"5.17.2","status":"unaffected","lessThanOrEqual":"5.17.*","versionType":"semver"},{"version":"5.18","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/sched/act_ct.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/9222a08be539cbb7a8e0d46cbc7ab9e4db273eb8"},{"url":"https://git.kernel.org/stable/c/bcbf4e5c3b5b373cd61528392dd1ec8e9c0fd33d"},{"url":"https://git.kernel.org/stable/c/4bb42d73def9411e5cad885b9811987d72431df1"},{"url":"https://git.kernel.org/stable/c/b24793a37d91aacad7cb9893b226a7924a89636a"},{"url":"https://git.kernel.org/stable/c/bcb74e132a76ce0502bb33d5b65533a4ed72d159"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-06-01T16:03:48.869Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10.103","versionEndExcluding":"5.10.258"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15.26","versionEndExcluding":"5.15.33"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.16.12","versionEndExcluding":"5.16.19"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.17","versionEndExcluding":"5.17.2"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.17","versionEndExcluding":"5.18"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":5.5,"attackVector":"LOCAL","baseSeverity":"MEDIUM","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","integrityImpact":"NONE","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"HIGH","privilegesRequired":"LOW","confidentialityImpact":"NONE"}},{"other":{"type":"ssvc","content":{"id":"CVE-2022-49183","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2025-10-01T19:47:32.813819Z"}}}],"problemTypes":[{"descriptions":[{"lang":"en","type":"CWE","description":"CWE-noinfo Not enough information"}]}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2025-10-01T19:56:59.861Z"}}]}}}