{"resultsPerPage":1,"startIndex":0,"totalResults":1,"format":"NVD_CVE","version":"2.0","timestamp":"2026-05-10T01:24:29.842","vulnerabilities":[{"cve":{"id":"CVE-2026-23231","sourceIdentifier":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","published":"2026-03-04T13:15:58.137","lastModified":"2026-04-02T15:16:24.693","vulnStatus":"Modified","cveTags":[],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nf_tables: fix use-after-free in nf_tables_addchain()\n\nnf_tables_addchain() publishes the chain to table->chains via\nlist_add_tail_rcu() (in nft_chain_add()) before registering hooks.\nIf nf_tables_register_hook() then fails, the error path calls\nnft_chain_del() (list_del_rcu()) followed by nf_tables_chain_destroy()\nwith no RCU grace period in between.\n\nThis creates two use-after-free conditions:\n\n 1) Control-plane: nf_tables_dump_chains() traverses table->chains\n    under rcu_read_lock(). A concurrent dump can still be walking\n    the chain when the error path frees it.\n\n 2) Packet path: for NFPROTO_INET, nf_register_net_hook() briefly\n    installs the IPv4 hook before IPv6 registration fails.  Packets\n    entering nft_do_chain() via the transient IPv4 hook can still be\n    dereferencing chain->blob_gen_X when the error path frees the\n    chain.\n\nAdd synchronize_rcu() between nft_chain_del() and the chain destroy\nso that all RCU readers -- both dump threads and in-flight packet\nevaluation -- have finished before the chain is freed."},{"lang":"es","value":"En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nnetfilter: nf_tables: corrige uso después de liberación en nf_tables_addchain()\n\nnf_tables_addchain() publica la cadena en table->chains a través de list_add_tail_rcu() (en nft_chain_add()) antes de registrar los ganchos. Si nf_tables_register_hook() falla entonces, la ruta de error llama a nft_chain_del() (list_del_rcu()) seguido de nf_tables_chain_destroy() sin un período de gracia RCU intermedio.\n\nEsto crea dos condiciones de uso después de liberación:\n\n1) Plano de control: nf_tables_dump_chains() recorre table->chains bajo rcu_read_lock(). Un volcado concurrente aún puede estar recorriendo la cadena cuando la ruta de error la libera.\n\n2) Ruta de paquetes: para NFPROTO_INET, nf_register_net_hook() instala brevemente el gancho IPv4 antes de que falle el registro de IPv6. Los paquetes que entran en nft_do_chain() a través del gancho IPv4 transitorio aún pueden estar desreferenciando chain->blob_gen_X cuando la ruta de error libera la cadena.\n\nAñadir synchronize_rcu() entre nft_chain_del() y la destrucción de la cadena para que todos los lectores RCU -- tanto los hilos de volcado como la evaluación de paquetes en curso -- hayan terminado antes de que la cadena sea liberada."}],"metrics":{"cvssMetricV31":[{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":1.8,"impactScore":5.9},{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":1.8,"impactScore":5.9}]},"weaknesses":[{"source":"nvd@nist.gov","type":"Primary","description":[{"lang":"en","value":"CWE-416"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.16","versionEndExcluding":"6.1.165","matchCriteriaId":"E51277CF-00C8-4E26-BC0E-6A90823CCC3E"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.2","versionEndExcluding":"6.6.128","matchCriteriaId":"851E9353-6C09-4CC9-877E-E09DB164A3C2"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.7","versionEndExcluding":"6.12.75","matchCriteriaId":"BCE16369-98ED-41CF-8995-DFDC10B288D2"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.13","versionEndExcluding":"6.18.14","matchCriteriaId":"BF463CB7-1F58-4607-B847-77ED23E4B9B7"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.19","versionEndExcluding":"6.19.4","matchCriteriaId":"672A3E79-EC03-479D-8503-361DFBDC8092"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/2a6586ecfa4ce1413daaafee250d2590e05f1a33","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/2f9a4ffeb763aec822f8ff3d1e82202d27d46d4b","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/7017745068a9068904e1e7a1b170a5785647cc81","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/71e99ee20fc3f662555118cf1159443250647533","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/dbd0af8083dd201f07c49110b2ee93710abdff28","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/f3fe58ce37926a10115ede527d59b91bcc05400a","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]}]}}]}