{
  "threat_severity" : "Low",
  "public_date" : "2026-03-28T00:00:00Z",
  "bugzilla" : {
    "description" : "kernel: nf_tables: nft_dynset: fix possible stateful expression memleak in error path",
    "id" : "2452569",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2452569"
  },
  "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" : "draft"
  },
  "cwe" : "CWE-772",
  "details" : [ "In the Linux kernel, the following vulnerability has been resolved:\nnf_tables: nft_dynset: fix possible stateful expression memleak in error path\nIf cloning the second stateful expression in the element via GFP_ATOMIC\nfails, then the first stateful expression remains in place without being\nreleased.\n  unreferenced object (percpu) 0x607b97e9cab8 (size 16):\n    comm \"softirq\", pid 0, jiffies 4294931867\n    hex dump (first 16 bytes on cpu 3):\n      00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00\n    backtrace (crc 0):\n      pcpu_alloc_noprof+0x453/0xd80\n      nft_counter_clone+0x9c/0x190 [nf_tables]\n      nft_expr_clone+0x8f/0x1b0 [nf_tables]\n      nft_dynset_new+0x2cb/0x5f0 [nf_tables]\n      nft_rhash_update+0x236/0x11c0 [nf_tables]\n      nft_dynset_eval+0x11f/0x670 [nf_tables]\n      nft_do_chain+0x253/0x1700 [nf_tables]\n      nft_do_chain_ipv4+0x18d/0x270 [nf_tables]\n      nf_hook_slow+0xaa/0x1e0\n      ip_local_deliver+0x209/0x330", "A flaw was found in the Linux kernel's nf_tables component. This memory leak vulnerability occurs when cloning a stateful expression fails, leading to an unreleased expression. This can result in a Denial of Service (DoS) due to resource exhaustion." ],
  "package_state" : [ {
    "product_name" : "Red Hat Enterprise Linux 10",
    "fix_state" : "Fix deferred",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:10"
  }, {
    "product_name" : "Red Hat Enterprise Linux 6",
    "fix_state" : "Not affected",
    "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 8",
    "fix_state" : "Fix deferred",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "fix_state" : "Fix deferred",
    "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",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9"
  }, {
    "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-2026-23399\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-23399\nhttps://lore.kernel.org/linux-cve-announce/2026032820-CVE-2026-23399-60d0@gregkh/T" ],
  "name" : "CVE-2026-23399",
  "csaw" : false
}