{
  "threat_severity" : "Moderate",
  "public_date" : "2026-07-20T00:00:00Z",
  "bugzilla" : {
    "description" : "kernel: netfilter: ipset: fix race between dump and ip_set_list resize",
    "id" : "2502889",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2502889"
  },
  "cvss3" : {
    "cvss3_base_score" : "7.0",
    "cvss3_scoring_vector" : "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
    "status" : "verified"
  },
  "cwe" : "CWE-825",
  "details" : [ "In the Linux kernel, the following vulnerability has been resolved:\nnetfilter: ipset: fix race between dump and ip_set_list resize\nThe release path of ip_set_dump_do() and ip_set_dump_done() read\ninst->ip_set_list via ip_set_ref_netlink(), a plain rcu_dereference_raw()\nof the array pointer. These run from netlink_recvmsg() without the nfnl\nmutex and without an RCU read-side critical section.\nA concurrent ip_set_create() can grow the array: it publishes the new\narray, calls synchronize_net() and then kvfree()s the old one. Since the\ndump paths read the array outside any RCU reader, synchronize_net() does\nnot wait for them and the old array can be freed while they still index\ninto it, causing a use-after-free.\nThe dumped set itself stays pinned via set->ref_netlink, so only the\narray load needs protecting. Take rcu_read_lock() around it, matching\nip_set_get_byname() and __ip_set_put_byindex().\nBUG: KASAN: slab-use-after-free in ip_set_dump_do (net/netfilter/ipset/ip_set_core.c:1697)\nRead of size 8 at addr ffff88800b5c4018 by task exploit/150\nCall Trace:\n...\nkasan_report (mm/kasan/report.c:595)\nip_set_dump_do (net/netfilter/ipset/ip_set_core.c:1697)\nnetlink_dump (net/netlink/af_netlink.c:2325)\nnetlink_recvmsg (net/netlink/af_netlink.c:1976)\nsock_recvmsg (net/socket.c:1159)\n__sys_recvfrom (net/socket.c:2315)\n...\nOops: general protection fault, probably for non-canonical address ... KASAN NOPTI\nKASAN: maybe wild-memory-access in range [0x02d6...d0-0x02d6...d7]\nRIP: 0010:ip_set_dump_do (net/netfilter/ipset/ip_set_core.c:1698)\nKernel panic - not syncing: Fatal exception", "A flaw was found in the Linux kernel's netfilter ipset component. A race condition exists between the `ip_set_list` resize operation and dump operations. This can lead to a use-after-free vulnerability, where memory is accessed after it has been deallocated. A successful exploitation of this flaw could result in a kernel panic, effectively causing a Denial of Service (DoS) on the system." ],
  "affected_release" : [ {
    "product_name" : "Red Hat Enterprise Linux 10",
    "release_date" : "2026-09-01T00:00:00Z",
    "advisory" : "RHSA-2026:61887",
    "cpe" : "cpe:/o:redhat:enterprise_linux:10.2",
    "package" : "kernel-0:6.12.0-211.50.1.el10_2"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "release_date" : "2026-08-26T00:00:00Z",
    "advisory" : "RHSA-2026:59737",
    "cpe" : "cpe:/a:redhat:enterprise_linux:8::nfv",
    "package" : "kernel-rt-0:4.18.0-553.158.1.rt7.499.el8_10"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "release_date" : "2026-08-26T00:00:00Z",
    "advisory" : "RHSA-2026:59821",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8",
    "package" : "kernel-0:4.18.0-553.158.1.el8_10"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "release_date" : "2026-08-26T00:00:00Z",
    "advisory" : "RHSA-2026:59723",
    "cpe" : "cpe:/a:redhat:enterprise_linux:9",
    "package" : "kernel-0:5.14.0-687.42.1.el9_8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "release_date" : "2026-08-26T00:00:00Z",
    "advisory" : "RHSA-2026:59723",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9",
    "package" : "kernel-0:5.14.0-687.42.1.el9_8"
  } ],
  "package_state" : [ {
    "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" : "Not affected",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7",
    "fix_state" : "Not affected",
    "package_name" : "kernel-rt",
    "cpe" : "cpe:/o:redhat:enterprise_linux:7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "fix_state" : "Affected",
    "package_name" : "kernel-rt",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9"
  }, {
    "product_name" : "Red Hat Hardened Images",
    "fix_state" : "Not affected",
    "package_name" : "erlang27",
    "cpe" : "cpe:/a:redhat:hummingbird:1",
    "impact" : "important"
  } ],
  "references" : [ "https://www.cve.org/CVERecord?id=CVE-2026-64189\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-64189\nhttps://lore.kernel.org/linux-cve-announce/2026072051-CVE-2026-64189-b911@gregkh/T" ],
  "name" : "CVE-2026-64189",
  "csaw" : false
}