{
  "public_date" : "2026-05-06T00:00:00Z",
  "bugzilla" : {
    "description" : "kernel: io_uring/zcrx: fix user_ref race between scrub and refill paths",
    "id" : "2467110",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2467110"
  },
  "cwe" : "CWE-366",
  "details" : [ "A flaw was found in the `io_uring/zcrx` component of the Linux kernel. This vulnerability involves a race condition where two operations can manipulate the same memory counter simultaneously without proper synchronization. This can lead to a memory object being freed twice, followed by an out-of-bounds write. Such memory corruption could allow a local attacker to escalate privileges or execute arbitrary code, potentially compromising the system." ],
  "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" : "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" : "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" : "Not affected",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "fix_state" : "Not affected",
    "package_name" : "kernel-rt",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9"
  } ],
  "references" : [ "https://www.cve.org/CVERecord?id=CVE-2026-43121\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-43121\nhttps://lore.kernel.org/linux-cve-announce/2026050618-CVE-2026-43121-2a26@gregkh/T" ],
  "name" : "CVE-2026-43121",
  "csaw" : false
}