{"id":"CVE-2026-52988","state":"PUBLISHED","title":"netfilter: nf_tables: join hook list via splice_list_rcu() in commit phase","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nf_tables: join hook list via splice_list_rcu() in commit phase\n\nPublish new hooks in the list into the basechain/flowtable using\nsplice_list_rcu() to ensure netlink dump list traversal via rcu is safe\nwhile concurrent ruleset update is going on.","publishedAt":"2026-06-24T16:29:02.580Z","updatedAt":"2026-10-19T19:47:12.239Z","severity":{"score":7.1,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H","source":"Linux"},"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"78d9f48f7f44431a25da2b46b3a8812f6ff2b981","status":"affected","lessThan":"ed8d3bd8272e49ea987100de2abfb13710329a9b","versionType":"git"},{"version":"78d9f48f7f44431a25da2b46b3a8812f6ff2b981","status":"affected","lessThan":"8fdd2204503ab1ce07dc000c277e2c3edf96a67b","versionType":"git"},{"version":"78d9f48f7f44431a25da2b46b3a8812f6ff2b981","status":"affected","lessThan":"5593c640f9daedec8de61555c41e1019fa675aa6","versionType":"git"},{"version":"78d9f48f7f44431a25da2b46b3a8812f6ff2b981","status":"affected","lessThan":"00e370627f2e1fb3585f9d26348b1abddc75442b","versionType":"git"},{"version":"78d9f48f7f44431a25da2b46b3a8812f6ff2b981","status":"affected","lessThan":"28ecfb3d1fe8dea70319de7051cb6718c25b5b52","versionType":"git"},{"version":"78d9f48f7f44431a25da2b46b3a8812f6ff2b981","status":"affected","lessThan":"a557816c6e38e9473d99aa9ea8c662f55fc85847","versionType":"git"},{"version":"78d9f48f7f44431a25da2b46b3a8812f6ff2b981","status":"affected","lessThan":"1346be9379639c30877083b12747d4eacb83c24f","versionType":"git"},{"version":"78d9f48f7f44431a25da2b46b3a8812f6ff2b981","status":"affected","lessThan":"a6134e62dba2ea4f760b29d5226907f447c92400","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/netfilter/nf_tables_api.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.8","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.8","versionType":"semver"},{"version":"5.10.271","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.222","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.189","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.158","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.112","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.55","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.0.10","status":"unaffected","lessThanOrEqual":"7.0.*","versionType":"semver"},{"version":"7.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/netfilter/nf_tables_api.c"]}],"references":["https://git.kernel.org/stable/c/ed8d3bd8272e49ea987100de2abfb13710329a9b","https://git.kernel.org/stable/c/8fdd2204503ab1ce07dc000c277e2c3edf96a67b","https://git.kernel.org/stable/c/5593c640f9daedec8de61555c41e1019fa675aa6","https://git.kernel.org/stable/c/00e370627f2e1fb3585f9d26348b1abddc75442b","https://git.kernel.org/stable/c/28ecfb3d1fe8dea70319de7051cb6718c25b5b52","https://git.kernel.org/stable/c/a557816c6e38e9473d99aa9ea8c662f55fc85847","https://git.kernel.org/stable/c/1346be9379639c30877083b12747d4eacb83c24f","https://git.kernel.org/stable/c/a6134e62dba2ea4f760b29d5226907f447c92400"],"weaknesses":["CWE-362"],"ingestedAt":"2026-10-29T20:12:16.098Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/52xxx/CVE-2026-52988.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-52988","state":"PUBLISHED","datePublished":"2026-06-24T16:29:02.580Z","dateUpdated":"2026-10-19T19:47:12.239Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-06-09T07:44:35.376Z"},"containers":{"cna":{"title":"netfilter: nf_tables: join hook list via splice_list_rcu() in commit phase","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nf_tables: join hook list via splice_list_rcu() in commit phase\n\nPublish new hooks in the list into the basechain/flowtable using\nsplice_list_rcu() to ensure netlink dump list traversal via rcu is safe\nwhile concurrent ruleset update is going on."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"78d9f48f7f44431a25da2b46b3a8812f6ff2b981","status":"affected","lessThan":"ed8d3bd8272e49ea987100de2abfb13710329a9b","versionType":"git"},{"version":"78d9f48f7f44431a25da2b46b3a8812f6ff2b981","status":"affected","lessThan":"8fdd2204503ab1ce07dc000c277e2c3edf96a67b","versionType":"git"},{"version":"78d9f48f7f44431a25da2b46b3a8812f6ff2b981","status":"affected","lessThan":"5593c640f9daedec8de61555c41e1019fa675aa6","versionType":"git"},{"version":"78d9f48f7f44431a25da2b46b3a8812f6ff2b981","status":"affected","lessThan":"00e370627f2e1fb3585f9d26348b1abddc75442b","versionType":"git"},{"version":"78d9f48f7f44431a25da2b46b3a8812f6ff2b981","status":"affected","lessThan":"28ecfb3d1fe8dea70319de7051cb6718c25b5b52","versionType":"git"},{"version":"78d9f48f7f44431a25da2b46b3a8812f6ff2b981","status":"affected","lessThan":"a557816c6e38e9473d99aa9ea8c662f55fc85847","versionType":"git"},{"version":"78d9f48f7f44431a25da2b46b3a8812f6ff2b981","status":"affected","lessThan":"1346be9379639c30877083b12747d4eacb83c24f","versionType":"git"},{"version":"78d9f48f7f44431a25da2b46b3a8812f6ff2b981","status":"affected","lessThan":"a6134e62dba2ea4f760b29d5226907f447c92400","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/netfilter/nf_tables_api.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.8","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.8","versionType":"semver"},{"version":"5.10.271","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.222","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.189","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.158","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.112","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.55","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.0.10","status":"unaffected","lessThanOrEqual":"7.0.*","versionType":"semver"},{"version":"7.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/netfilter/nf_tables_api.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/ed8d3bd8272e49ea987100de2abfb13710329a9b"},{"url":"https://git.kernel.org/stable/c/8fdd2204503ab1ce07dc000c277e2c3edf96a67b"},{"url":"https://git.kernel.org/stable/c/5593c640f9daedec8de61555c41e1019fa675aa6"},{"url":"https://git.kernel.org/stable/c/00e370627f2e1fb3585f9d26348b1abddc75442b"},{"url":"https://git.kernel.org/stable/c/28ecfb3d1fe8dea70319de7051cb6718c25b5b52"},{"url":"https://git.kernel.org/stable/c/a557816c6e38e9473d99aa9ea8c662f55fc85847"},{"url":"https://git.kernel.org/stable/c/1346be9379639c30877083b12747d4eacb83c24f"},{"url":"https://git.kernel.org/stable/c/a6134e62dba2ea4f760b29d5226907f447c92400"}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H","baseScore":7.1,"baseSeverity":"HIGH"},"scenarios":[{"lang":"en","value":"AV:L - Reachability is through nfnetlink/nftables netlink operations (`NFT_MSG_NEWCHAIN`/`NEWFLOWTABLE` and concurrent `GETCHAIN`/`GETFLOWTABLE` dumps), which require local ability to send netlink messages.\nAC:L - The bug is a race between an attacker-controlled ruleset update and an attacker-controlled concurrent RCU dump; both sides can be generated repeatedly from local processes.\nPR:L - nfnetlink checks `CAP_NET_ADMIN` in the target network namespace, and nftables/netfilter administration is reachable from unprivileged users via user+network namespaces on affected configurations.\nUI:N - No victim interaction is required; the attacker triggers both the update and dump operations directly.\nS:U - The impact remains within the kernel/local host security authority and does not cross a VM, IOMMU, or separate security-scope boundary.\nC:H - Unsafe non-RCU list publication can make an RCU netlink dump interpret a transaction list head or freed transaction memory as `struct nft_hook`, leading to out-of-bounds/use-after-free reads returned through netlink hook device-name serialization.\nI:N - The reachable affected dump path reads hook-list entries and serializes names; I did not find a defensible attacker-controlled write or control-flow primitive from this bug.\nA:H - The malformed RCU traversal can dereference invalid/freed memory or loop over an inconsistent list, making kernel oops, panic, or soft lockup a plausible outcome."}]}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-03T10:55:33.999Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.8","versionEndExcluding":"5.10.271"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.8","versionEndExcluding":"5.15.222"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.8","versionEndExcluding":"6.1.189"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.8","versionEndExcluding":"6.6.158"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.8","versionEndExcluding":"6.12.112"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.8","versionEndExcluding":"6.18.55"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.8","versionEndExcluding":"7.0.10"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.8","versionEndExcluding":"7.1"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2026-52988","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2026-10-16T15:24:11.399025Z"}}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-362","lang":"en","type":"CWE","description":"CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')"}]}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-19T19:47:12.239Z"}}]}}}