{
  "threat_severity" : "Low",
  "public_date" : "2025-10-01T00:00:00Z",
  "bugzilla" : {
    "description" : "kernel: Linux kernel: Denial of Service due to race condition in IOMMU pasid unbinding",
    "id" : "2400711",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2400711"
  },
  "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" : "verified"
  },
  "cwe" : "CWE-911",
  "details" : [ "In the Linux kernel, the following vulnerability has been resolved:\niommu/amd/iommu_v2: Fix pasid_state refcount dec hit 0 warning on pasid unbind\nWhen unbinding pasid - a race condition exists vs outstanding page faults.\nTo prevent this, the pasid_state object contains a refcount.\n* set to 1 on pasid bind\n* incremented on each ppr notification start\n* decremented on each ppr notification done\n* decremented on pasid unbind\nSince refcount_dec assumes that refcount will never reach 0:\nthe current implementation causes the following to be invoked on\npasid unbind:\nREFCOUNT_WARN(\"decrement hit 0; leaking memory\")\nFix this issue by changing refcount_dec to refcount_dec_and_test\nto explicitly handle refcount=1.", "A flaw was found in the Linux kernel's iommu/amd/iommu_v2 component. A local attacker with low privileges could exploit a race condition during pasid unbinding when outstanding page faults exist. This vulnerability causes a reference count to incorrectly decrement to zero, leading to a memory leak and ultimately a Denial of Service (DoS)." ],
  "affected_release" : [ {
    "product_name" : "Red Hat Enterprise Linux 8",
    "release_date" : "2024-05-22T00:00:00Z",
    "advisory" : "RHSA-2024:3138",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8",
    "package" : "kernel-0:4.18.0-553.el8_10"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "release_date" : "2024-04-30T00:00:00Z",
    "advisory" : "RHSA-2024:2394",
    "cpe" : "cpe:/a:redhat:enterprise_linux:9",
    "package" : "kernel-0:5.14.0-427.13.1.el9_4"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "release_date" : "2024-04-30T00:00:00Z",
    "advisory" : "RHSA-2024:2394",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9",
    "package" : "kernel-0:5.14.0-427.13.1.el9_4"
  } ],
  "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" : "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-rt",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9"
  } ],
  "references" : [ "https://www.cve.org/CVERecord?id=CVE-2023-53501\nhttps://nvd.nist.gov/vuln/detail/CVE-2023-53501\nhttps://lore.kernel.org/linux-cve-announce/2025100127-CVE-2023-53501-5859@gregkh/T" ],
  "name" : "CVE-2023-53501",
  "csaw" : false
}