{
  "threat_severity" : "Moderate",
  "public_date" : "2025-05-01T00:00:00Z",
  "bugzilla" : {
    "description" : "kernel: netfilter: ipset: enforce documented limit to prevent allocating huge memory",
    "id" : "2363421",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2363421"
  },
  "cvss3" : {
    "cvss3_base_score" : "5.5",
    "cvss3_scoring_vector" : "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
    "status" : "verified"
  },
  "details" : [ "In the Linux kernel, the following vulnerability has been resolved:\nnetfilter: ipset: enforce documented limit to prevent allocating huge memory\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.\nThe quick reproducer is\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\nThe backtrace when vmalloc fails:\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<...>\nThe fix is to enforce the limit documented in the ipset(8) manpage:\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_release" : [ {
    "product_name" : "Red Hat Enterprise Linux 9",
    "release_date" : "2023-05-09T00:00:00Z",
    "advisory" : "RHSA-2023:2458",
    "cpe" : "cpe:/a:redhat:enterprise_linux:9",
    "package" : "kernel-0:5.14.0-284.11.1.el9_2"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "release_date" : "2023-05-09T00:00:00Z",
    "advisory" : "RHSA-2023:2458",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9",
    "package" : "kernel-0:5.14.0-284.11.1.el9_2"
  } ],
  "package_state" : [ {
    "product_name" : "Red Hat Enterprise Linux 10",
    "fix_state" : "Not affected",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:10"
  }, {
    "product_name" : "Red Hat Enterprise Linux 6",
    "fix_state" : "Out of support scope",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:6"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7",
    "fix_state" : "Out of support scope",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7",
    "fix_state" : "Out of support scope",
    "package_name" : "kernel-rt",
    "cpe" : "cpe:/o:redhat:enterprise_linux:7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "fix_state" : "Not affected",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "fix_state" : "Not affected",
    "package_name" : "kernel-rt",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "fix_state" : "Fix deferred",
    "package_name" : "kernel-rt",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9"
  } ],
  "references" : [ "https://www.cve.org/CVERecord?id=CVE-2022-49911\nhttps://nvd.nist.gov/vuln/detail/CVE-2022-49911\nhttps://lore.kernel.org/linux-cve-announce/2025050105-CVE-2022-49911-2e28@gregkh/T" ],
  "name" : "CVE-2022-49911",
  "csaw" : false
}