{
  "threat_severity" : "Moderate",
  "public_date" : "2026-03-10T00:00:00Z",
  "bugzilla" : {
    "description" : "kernel: Kernel: Race condition in espintcp can lead to denial of service",
    "id" : "2446109",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2446109"
  },
  "cvss3" : {
    "cvss3_base_score" : "5.8",
    "cvss3_scoring_vector" : "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:H",
    "status" : "draft"
  },
  "cwe" : "CWE-366",
  "details" : [ "In the Linux kernel, the following vulnerability has been resolved:\nespintcp: Fix race condition in espintcp_close()\nThis issue was discovered during a code audit.\nAfter cancel_work_sync() is called from espintcp_close(),\nespintcp_tx_work() can still be scheduled from paths such as\nthe Delayed ACK handler or ksoftirqd.\nAs a result, the espintcp_tx_work() worker may dereference a\nfreed espintcp ctx or sk.\nThe following is a simple race scenario:\ncpu0                             cpu1\nespintcp_close()\ncancel_work_sync(&ctx->work);\nespintcp_write_space()\nschedule_work(&ctx->work);\nTo prevent this race condition, cancel_work_sync() is\nreplaced with disable_work_sync().", "A flaw was found in the Linux kernel's espintcp component. A local attacker with low privileges could exploit a race condition in the espintcp_close() function. This could allow the espintcp_tx_work() worker to access freed memory, potentially leading to a system crash and resulting in a Denial of Service (DoS)." ],
  "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" : "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" : "Affected",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "fix_state" : "Will not fix",
    "package_name" : "kernel-rt",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9"
  } ],
  "references" : [ "https://www.cve.org/CVERecord?id=CVE-2026-23239\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-23239\nhttps://lore.kernel.org/linux-cve-announce/2026031031-CVE-2026-23239-1fc9@gregkh/T" ],
  "name" : "CVE-2026-23239",
  "csaw" : false
}