{
  "threat_severity" : "Moderate",
  "public_date" : "2024-08-17T00:00:00Z",
  "bugzilla" : {
    "description" : "kernel: block: initialize integrity buffer to zero before writing it to media",
    "id" : "2305512",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2305512"
  },
  "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-401",
  "details" : [ "In the Linux kernel, the following vulnerability has been resolved:\nblock: initialize integrity buffer to zero before writing it to media\nMetadata added by bio_integrity_prep is using plain kmalloc, which leads\nto random kernel memory being written media.  For PI metadata this is\nlimited to the app tag that isn't used by kernel generated metadata,\nbut for non-PI metadata the entire buffer leaks kernel memory.\nFix this by adding the __GFP_ZERO flag to allocations for writes.", "A flaw was found in the Linux kernel, where it initialized the integrity buffer to zero before writing it to media. Metadata added by bio_integrity_prep uses plain kmalloc, which leads to random kernel memory being written. Protection Information (PI) metadata is limited to the app tag not used by kernel-generated metadata, but for non-PI metadata, the entire buffer leaks kernel memory, potentially exposing sensitive internal kernel data." ],
  "affected_release" : [ {
    "product_name" : "Red Hat Enterprise Linux 8",
    "release_date" : "2024-11-05T00:00:00Z",
    "advisory" : "RHSA-2024:8870",
    "cpe" : "cpe:/a:redhat:enterprise_linux:8::nfv",
    "package" : "kernel-rt-0:4.18.0-553.27.1.rt7.368.el8_10"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "release_date" : "2024-11-05T00:00:00Z",
    "advisory" : "RHSA-2024:8856",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8",
    "package" : "kernel-0:4.18.0-553.27.1.el8_10"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "release_date" : "2024-12-11T00:00:00Z",
    "advisory" : "RHSA-2024:10939",
    "cpe" : "cpe:/a:redhat:enterprise_linux:9",
    "package" : "kernel-0:5.14.0-503.16.1.el9_5"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "release_date" : "2024-10-30T00:00:00Z",
    "advisory" : "RHSA-2024:8617",
    "cpe" : "cpe:/a:redhat:enterprise_linux:9",
    "package" : "kernel-0:5.14.0-427.42.1.el9_4"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "release_date" : "2024-12-11T00:00:00Z",
    "advisory" : "RHSA-2024:10939",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9",
    "package" : "kernel-0:5.14.0-503.16.1.el9_5"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "release_date" : "2024-10-30T00:00:00Z",
    "advisory" : "RHSA-2024:8617",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9",
    "package" : "kernel-0:5.14.0-427.42.1.el9_4"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9.2 Extended Update Support",
    "release_date" : "2024-12-04T00:00:00Z",
    "advisory" : "RHSA-2024:10772",
    "cpe" : "cpe:/a:redhat:rhel_eus:9.2",
    "package" : "kernel-0:5.14.0-284.95.1.el9_2"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9.2 Extended Update Support",
    "release_date" : "2024-12-04T00:00:00Z",
    "advisory" : "RHSA-2024:10773",
    "cpe" : "cpe:/a:redhat:rhel_eus:9.2::nfv",
    "package" : "kernel-rt-0:5.14.0-284.95.1.rt14.380.el9_2"
  } ],
  "package_state" : [ {
    "product_name" : "Red Hat Enterprise Linux 6",
    "fix_state" : "Out of support scope",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:6"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7",
    "fix_state" : "Out of support scope",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7",
    "fix_state" : "Out of support scope",
    "package_name" : "kernel-rt",
    "cpe" : "cpe:/o:redhat:enterprise_linux:7"
  }, {
    "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-2024-43854\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-43854\nhttps://lore.kernel.org/linux-cve-announce/2024081734-CVE-2024-43854-5586@gregkh/T" ],
  "name" : "CVE-2024-43854",
  "mitigation" : {
    "value" : "Fix this issue by adding the __GFP_ZERO flag to allocations for writes.",
    "lang" : "en:us"
  },
  "csaw" : false
}