{
  "threat_severity" : "Important",
  "public_date" : "2026-06-24T00:00:00Z",
  "bugzilla" : {
    "description" : "kernel: netfilter: conntrack: remove sprintf usage",
    "id" : "2492329",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2492329"
  },
  "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-787",
  "details" : [ "In the Linux kernel, the following vulnerability has been resolved:\nnetfilter: conntrack: remove sprintf usage\nReplace it with scnprintf, the buffer sizes are expected to be large enough\nto hold the result, no need for snprintf+overflow check.\nIncrease buffer size in mangle_content_len() while at it.\nBUG: KASAN: stack-out-of-bounds in vsnprintf+0xea5/0x1270\nWrite of size 1 at addr [..]\nvsnprintf+0xea5/0x1270\nsprintf+0xb1/0xe0\nmangle_content_len+0x1ac/0x280\nnf_nat_sdp_session+0x1cc/0x240\nprocess_sdp+0x8f8/0xb80\nprocess_invite_request+0x108/0x2b0\nprocess_sip_msg+0x5da/0xf50\nsip_help_tcp+0x45e/0x780\nnf_confirm+0x34d/0x990\n[..]", "A flaw was found in the Linux kernel's netfilter conntrack module. This vulnerability arises from the use of `sprintf` and insufficient buffer sizing in the `mangle_content_len()` function, which can lead to a stack-out-of-bounds write. An attacker could potentially exploit this memory corruption issue to cause a denial of service or other unspecified impacts." ],
  "statement" : "An Important flaw was found in the Linux kernel's netfilter conntrack helper for SIP. A local attacker with low privileges could trigger a stack-out-of-bounds write by sending specially crafted SIP messages, potentially leading to a denial of service or privilege escalation. This vulnerability requires the system to process SIP traffic through netfilter.",
  "affected_release" : [ {
    "product_name" : "Red Hat Enterprise Linux 8",
    "release_date" : "2026-09-08T00:00:00Z",
    "advisory" : "RHSA-2026:64770",
    "cpe" : "cpe:/a:redhat:enterprise_linux:8::nfv",
    "package" : "kernel-rt-0:4.18.0-553.160.1.rt7.501.el8_10"
  } ],
  "package_state" : [ {
    "product_name" : "Red Hat Enterprise Linux 10",
    "fix_state" : "Affected",
    "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" : "Affected",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7",
    "fix_state" : "Affected",
    "package_name" : "kernel-rt",
    "cpe" : "cpe:/o:redhat:enterprise_linux:7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "fix_state" : "Affected",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "fix_state" : "Affected",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "fix_state" : "Affected",
    "package_name" : "kernel-rt",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9"
  } ],
  "references" : [ "https://www.cve.org/CVERecord?id=CVE-2026-53002\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-53002\nhttps://lore.kernel.org/linux-cve-announce/2026062447-CVE-2026-53002-8577@gregkh/T" ],
  "name" : "CVE-2026-53002",
  "mitigation" : {
    "value" : "To mitigate this issue, prevent the nf_conntrack_sip and nf_nat_sip modules from being loaded. See https://access.redhat.com/solutions/41278 for instructions.",
    "lang" : "en:us"
  },
  "csaw" : false
}