{"id":"DEBIAN-CVE-2022-49911","details":"In the Linux kernel, the following vulnerability has been resolved:  netfilter: ipset: enforce documented limit to prevent allocating huge memory  Daniel Xu reported that the hash:net,iface type of the ipset subsystem does not limit adding the same network with different interfaces to a set, which can lead to huge memory usage or allocation failure.  The quick reproducer is  $ ipset create ACL.IN.ALL_PERMIT hash:net,iface hashsize 1048576 timeout 0 $ 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  The backtrace when vmalloc fails:          [Tue Oct 25 00:13:08 2022] ipset: vmalloc error: size 1073741848, exceeds total pages         \u003c...\u003e         [Tue Oct 25 00:13:08 2022] Call Trace:         [Tue Oct 25 00:13:08 2022]  \u003cTASK\u003e         [Tue Oct 25 00:13:08 2022]  dump_stack_lvl+0x48/0x60         [Tue Oct 25 00:13:08 2022]  warn_alloc+0x155/0x180         [Tue Oct 25 00:13:08 2022]  __vmalloc_node_range+0x72a/0x760         [Tue Oct 25 00:13:08 2022]  ? hash_netiface4_add+0x7c0/0xb20         [Tue Oct 25 00:13:08 2022]  ? __kmalloc_large_node+0x4a/0x90         [Tue Oct 25 00:13:08 2022]  kvmalloc_node+0xa6/0xd0         [Tue Oct 25 00:13:08 2022]  ? hash_netiface4_resize+0x99/0x710         \u003c...\u003e  The fix is to enforce the limit documented in the ipset(8) manpage:  \u003e  The internal restriction of the hash:net,iface set type is that the same \u003e  network prefix cannot be stored with more than 64 different interfaces \u003e  in a single set.","modified":"2026-08-27T23:04:30.714477280Z","published":"2025-05-01T15:16:16.260Z","upstream":["CVE-2022-49911"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2022-49911"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:12","purl":"pkg:deb/debian/linux?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.0.8-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2022-49911.json"}},{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.0.8-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2022-49911.json"}},{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.0.8-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2022-49911.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}