{"id":"CVE-2026-97998","state":"PUBLISHED","title":"netfilter: nfnetlink_log: cope with concurrent instance destruction","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nfnetlink_log: cope with concurrent instance destruction\n\nInstances are refcounted. However, only memory release happens on the\n1 -> 0 transition; the unlink from hashes can occur with any refcount.\n\nUncooperative userspace can force a situation where a queue is pending\nfor destruction from netlink event while a different socket with same\nportid processes an UNBIND request.\n\nWith right timing, this will unhash the instance again:\n\nOops: general protection fault, [..]\nCall Trace:\n <TASK>\n nfulnl_recv_config+0x31a/0xd50\n nfnetlink_rcv_msg+0x7c2/0xeb0","publishedAt":"2026-09-25T10:23:28.074Z","updatedAt":"2026-10-19T09:12:05.094Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"0597f2680d666a3bcf101ac0c771ba7e50016bbd","status":"affected","lessThan":"c5c89beaa628d6ac527c6eb2e01b2b52eb417f59","versionType":"git"},{"version":"0597f2680d666a3bcf101ac0c771ba7e50016bbd","status":"affected","lessThan":"042465e7d3d3127e21f04e42c1639e2518b98915","versionType":"git"},{"version":"0597f2680d666a3bcf101ac0c771ba7e50016bbd","status":"affected","lessThan":"291685fc8d2e4cf75ed3a23c810883653f407f46","versionType":"git"},{"version":"0597f2680d666a3bcf101ac0c771ba7e50016bbd","status":"affected","lessThan":"3161186a2ff81288e9a5f35daf1911153764ecae","versionType":"git"},{"version":"0597f2680d666a3bcf101ac0c771ba7e50016bbd","status":"affected","lessThan":"0234d7ca0317be0a623300e1693cd794bbfdf8af","versionType":"git"},{"version":"0597f2680d666a3bcf101ac0c771ba7e50016bbd","status":"affected","lessThan":"1a7a8ac9a9f0ad0d410c901cb6f233833518844c","versionType":"git"},{"version":"0597f2680d666a3bcf101ac0c771ba7e50016bbd","status":"affected","lessThan":"e2dd0f1f8c4e6334699ea6382e52f6da0c7e45eb","versionType":"git"},{"version":"0597f2680d666a3bcf101ac0c771ba7e50016bbd","status":"affected","lessThan":"387d744fa7e499d2c3748a4e60e02ebb24e7fb16","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/netfilter/nfnetlink_log.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"2.6.14","status":"affected"},{"version":"0","status":"unaffected","lessThan":"2.6.14","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":"6.12.111","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.53","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.7","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/netfilter/nfnetlink_log.c"]}],"references":["https://git.kernel.org/stable/c/c5c89beaa628d6ac527c6eb2e01b2b52eb417f59","https://git.kernel.org/stable/c/042465e7d3d3127e21f04e42c1639e2518b98915","https://git.kernel.org/stable/c/291685fc8d2e4cf75ed3a23c810883653f407f46","https://git.kernel.org/stable/c/3161186a2ff81288e9a5f35daf1911153764ecae","https://git.kernel.org/stable/c/0234d7ca0317be0a623300e1693cd794bbfdf8af","https://git.kernel.org/stable/c/1a7a8ac9a9f0ad0d410c901cb6f233833518844c","https://git.kernel.org/stable/c/e2dd0f1f8c4e6334699ea6382e52f6da0c7e45eb","https://git.kernel.org/stable/c/387d744fa7e499d2c3748a4e60e02ebb24e7fb16"],"weaknesses":[],"ingestedAt":"2026-10-29T20:13:43.249Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/97xxx/CVE-2026-97998.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-97998","state":"PUBLISHED","datePublished":"2026-09-25T10:23:28.074Z","dateUpdated":"2026-10-19T09:12:05.094Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-25T10:18:58.209Z"},"containers":{"cna":{"title":"netfilter: nfnetlink_log: cope with concurrent instance destruction","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nfnetlink_log: cope with concurrent instance destruction\n\nInstances are refcounted. However, only memory release happens on the\n1 -> 0 transition; the unlink from hashes can occur with any refcount.\n\nUncooperative userspace can force a situation where a queue is pending\nfor destruction from netlink event while a different socket with same\nportid processes an UNBIND request.\n\nWith right timing, this will unhash the instance again:\n\nOops: general protection fault, [..]\nCall Trace:\n <TASK>\n nfulnl_recv_config+0x31a/0xd50\n nfnetlink_rcv_msg+0x7c2/0xeb0"}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"0597f2680d666a3bcf101ac0c771ba7e50016bbd","status":"affected","lessThan":"c5c89beaa628d6ac527c6eb2e01b2b52eb417f59","versionType":"git"},{"version":"0597f2680d666a3bcf101ac0c771ba7e50016bbd","status":"affected","lessThan":"042465e7d3d3127e21f04e42c1639e2518b98915","versionType":"git"},{"version":"0597f2680d666a3bcf101ac0c771ba7e50016bbd","status":"affected","lessThan":"291685fc8d2e4cf75ed3a23c810883653f407f46","versionType":"git"},{"version":"0597f2680d666a3bcf101ac0c771ba7e50016bbd","status":"affected","lessThan":"3161186a2ff81288e9a5f35daf1911153764ecae","versionType":"git"},{"version":"0597f2680d666a3bcf101ac0c771ba7e50016bbd","status":"affected","lessThan":"0234d7ca0317be0a623300e1693cd794bbfdf8af","versionType":"git"},{"version":"0597f2680d666a3bcf101ac0c771ba7e50016bbd","status":"affected","lessThan":"1a7a8ac9a9f0ad0d410c901cb6f233833518844c","versionType":"git"},{"version":"0597f2680d666a3bcf101ac0c771ba7e50016bbd","status":"affected","lessThan":"e2dd0f1f8c4e6334699ea6382e52f6da0c7e45eb","versionType":"git"},{"version":"0597f2680d666a3bcf101ac0c771ba7e50016bbd","status":"affected","lessThan":"387d744fa7e499d2c3748a4e60e02ebb24e7fb16","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/netfilter/nfnetlink_log.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"2.6.14","status":"affected"},{"version":"0","status":"unaffected","lessThan":"2.6.14","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":"6.12.111","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.53","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.7","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/netfilter/nfnetlink_log.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/c5c89beaa628d6ac527c6eb2e01b2b52eb417f59"},{"url":"https://git.kernel.org/stable/c/042465e7d3d3127e21f04e42c1639e2518b98915"},{"url":"https://git.kernel.org/stable/c/291685fc8d2e4cf75ed3a23c810883653f407f46"},{"url":"https://git.kernel.org/stable/c/3161186a2ff81288e9a5f35daf1911153764ecae"},{"url":"https://git.kernel.org/stable/c/0234d7ca0317be0a623300e1693cd794bbfdf8af"},{"url":"https://git.kernel.org/stable/c/1a7a8ac9a9f0ad0d410c901cb6f233833518844c"},{"url":"https://git.kernel.org/stable/c/e2dd0f1f8c4e6334699ea6382e52f6da0c7e45eb"},{"url":"https://git.kernel.org/stable/c/387d744fa7e499d2c3748a4e60e02ebb24e7fb16"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-19T09:12:05.094Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.14","versionEndExcluding":"5.10.271"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.14","versionEndExcluding":"5.15.222"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.14","versionEndExcluding":"6.1.189"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.14","versionEndExcluding":"6.6.158"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.14","versionEndExcluding":"6.12.111"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.14","versionEndExcluding":"6.18.53"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.14","versionEndExcluding":"7.2.7"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.14","versionEndExcluding":"7.3"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}