{"id":"CVE-2022-49698","state":"PUBLISHED","title":"netfilter: use get_random_u32 instead of prandom","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: use get_random_u32 instead of prandom\n\nbh might occur while updating per-cpu rnd_state from user context,\nie. local_out path.\n\nBUG: using smp_processor_id() in preemptible [00000000] code: nginx/2725\ncaller is nft_ng_random_eval+0x24/0x54 [nft_numgen]\nCall Trace:\n check_preemption_disabled+0xde/0xe0\n nft_ng_random_eval+0x24/0x54 [nft_numgen]\n\nUse the random driver instead, this also avoids need for local prandom\nstate. Moreover, prandom now uses the random driver since d4150779e60f\n(\"random32: use real rng for non-deterministic randomness\").\n\nBased on earlier patch from Pablo Neira.","publishedAt":"2025-02-26T02:24:19.519Z","updatedAt":"2026-05-11T19:04:59.536Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"978d8f9055c3a7c35db2ac99cd2580b993396e33","status":"affected","lessThan":"15cc30ac2a8d7185f8ebf97dd1ddd90a7c79783b","versionType":"git"},{"version":"978d8f9055c3a7c35db2ac99cd2580b993396e33","status":"affected","lessThan":"d0906b0fffc9f19bc42708ca3e84e2089088386c","versionType":"git"},{"version":"978d8f9055c3a7c35db2ac99cd2580b993396e33","status":"affected","lessThan":"6ce71f83f798be7e1ca68707fec449fbecb38852","versionType":"git"},{"version":"978d8f9055c3a7c35db2ac99cd2580b993396e33","status":"affected","lessThan":"b1fd94e704571f98b21027340eecf821b2bdffba","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/netfilter/nft_meta.c","net/netfilter/nft_numgen.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.18","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.18","versionType":"semver"},{"version":"5.10.127","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.51","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"5.18.8","status":"unaffected","lessThanOrEqual":"5.18.*","versionType":"semver"},{"version":"5.19","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/netfilter/nft_meta.c","net/netfilter/nft_numgen.c"]}],"references":["https://git.kernel.org/stable/c/15cc30ac2a8d7185f8ebf97dd1ddd90a7c79783b","https://git.kernel.org/stable/c/d0906b0fffc9f19bc42708ca3e84e2089088386c","https://git.kernel.org/stable/c/6ce71f83f798be7e1ca68707fec449fbecb38852","https://git.kernel.org/stable/c/b1fd94e704571f98b21027340eecf821b2bdffba"],"weaknesses":[],"ingestedAt":"2026-10-29T20:05:26.763Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2022/49xxx/CVE-2022-49698.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2022-49698","state":"PUBLISHED","datePublished":"2025-02-26T02:24:19.519Z","dateUpdated":"2026-05-11T19:04:59.536Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2025-02-26T02:21:30.443Z"},"containers":{"cna":{"title":"netfilter: use get_random_u32 instead of prandom","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: use get_random_u32 instead of prandom\n\nbh might occur while updating per-cpu rnd_state from user context,\nie. local_out path.\n\nBUG: using smp_processor_id() in preemptible [00000000] code: nginx/2725\ncaller is nft_ng_random_eval+0x24/0x54 [nft_numgen]\nCall Trace:\n check_preemption_disabled+0xde/0xe0\n nft_ng_random_eval+0x24/0x54 [nft_numgen]\n\nUse the random driver instead, this also avoids need for local prandom\nstate. Moreover, prandom now uses the random driver since d4150779e60f\n(\"random32: use real rng for non-deterministic randomness\").\n\nBased on earlier patch from Pablo Neira."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"978d8f9055c3a7c35db2ac99cd2580b993396e33","status":"affected","lessThan":"15cc30ac2a8d7185f8ebf97dd1ddd90a7c79783b","versionType":"git"},{"version":"978d8f9055c3a7c35db2ac99cd2580b993396e33","status":"affected","lessThan":"d0906b0fffc9f19bc42708ca3e84e2089088386c","versionType":"git"},{"version":"978d8f9055c3a7c35db2ac99cd2580b993396e33","status":"affected","lessThan":"6ce71f83f798be7e1ca68707fec449fbecb38852","versionType":"git"},{"version":"978d8f9055c3a7c35db2ac99cd2580b993396e33","status":"affected","lessThan":"b1fd94e704571f98b21027340eecf821b2bdffba","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/netfilter/nft_meta.c","net/netfilter/nft_numgen.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.18","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.18","versionType":"semver"},{"version":"5.10.127","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.51","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"5.18.8","status":"unaffected","lessThanOrEqual":"5.18.*","versionType":"semver"},{"version":"5.19","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/netfilter/nft_meta.c","net/netfilter/nft_numgen.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/15cc30ac2a8d7185f8ebf97dd1ddd90a7c79783b"},{"url":"https://git.kernel.org/stable/c/d0906b0fffc9f19bc42708ca3e84e2089088386c"},{"url":"https://git.kernel.org/stable/c/6ce71f83f798be7e1ca68707fec449fbecb38852"},{"url":"https://git.kernel.org/stable/c/b1fd94e704571f98b21027340eecf821b2bdffba"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T19:04:59.536Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.18","versionEndExcluding":"5.10.127"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.18","versionEndExcluding":"5.15.51"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.18","versionEndExcluding":"5.18.8"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.18","versionEndExcluding":"5.19"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}