{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2022-49911","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2025-05-01T14:05:17.248Z","datePublished":"2025-05-01T14:10:53.631Z","dateUpdated":"2026-05-11T19:09:05.818Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-05-11T19:09:05.818Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: ipset: enforce documented limit to prevent allocating huge memory\n\nDaniel Xu reported that the hash:net,iface type of the ipset subsystem does\nnot limit adding the same network with different interfaces to a set, which\ncan lead to huge memory usage or allocation failure.\n\nThe quick reproducer is\n\n$ ipset create ACL.IN.ALL_PERMIT hash:net,iface hashsize 1048576 timeout 0\n$ for i in $(seq 0 100); do /sbin/ipset add ACL.IN.ALL_PERMIT 0.0.0.0/0,kaf_$i timeout 0 -exist; done\n\nThe backtrace when vmalloc fails:\n\n        [Tue Oct 25 00:13:08 2022] ipset: vmalloc error: size 1073741848, exceeds total pages\n        <...>\n        [Tue Oct 25 00:13:08 2022] Call Trace:\n        [Tue Oct 25 00:13:08 2022]  <TASK>\n        [Tue Oct 25 00:13:08 2022]  dump_stack_lvl+0x48/0x60\n        [Tue Oct 25 00:13:08 2022]  warn_alloc+0x155/0x180\n        [Tue Oct 25 00:13:08 2022]  __vmalloc_node_range+0x72a/0x760\n        [Tue Oct 25 00:13:08 2022]  ? hash_netiface4_add+0x7c0/0xb20\n        [Tue Oct 25 00:13:08 2022]  ? __kmalloc_large_node+0x4a/0x90\n        [Tue Oct 25 00:13:08 2022]  kvmalloc_node+0xa6/0xd0\n        [Tue Oct 25 00:13:08 2022]  ? hash_netiface4_resize+0x99/0x710\n        <...>\n\nThe fix is to enforce the limit documented in the ipset(8) manpage:\n\n>  The internal restriction of the hash:net,iface set type is that the same\n>  network prefix cannot be stored with more than 64 different interfaces\n>  in a single set."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/netfilter/ipset/ip_set_hash_gen.h"],"versions":[{"version":"ccf0a4b7fc688561428290265e4effde41446668","lessThan":"42d20d5e24575c9afa2d66d9a51e7386db9514f5","status":"affected","versionType":"git"},{"version":"ccf0a4b7fc688561428290265e4effde41446668","lessThan":"a37ef32fe5956fe9248df68f6a61997845ba047e","status":"affected","versionType":"git"},{"version":"ccf0a4b7fc688561428290265e4effde41446668","lessThan":"510841da1fcc16f702440ab58ef0b4d82a9056b7","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/netfilter/ipset/ip_set_hash_gen.h"],"versions":[{"version":"5.11","status":"affected"},{"version":"0","lessThan":"5.11","status":"unaffected","versionType":"semver"},{"version":"5.15.78","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.0.8","lessThanOrEqual":"6.0.*","status":"unaffected","versionType":"semver"},{"version":"6.1","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.11","versionEndExcluding":"5.15.78"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.11","versionEndExcluding":"6.0.8"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.11","versionEndExcluding":"6.1"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/42d20d5e24575c9afa2d66d9a51e7386db9514f5"},{"url":"https://git.kernel.org/stable/c/a37ef32fe5956fe9248df68f6a61997845ba047e"},{"url":"https://git.kernel.org/stable/c/510841da1fcc16f702440ab58ef0b4d82a9056b7"}],"title":"netfilter: ipset: enforce documented limit to prevent allocating huge memory","x_generator":{"engine":"bippy-1.2.0"}}}}