{
  "threat_severity" : "Moderate",
  "public_date" : "2026-05-19T00:00:00Z",
  "bugzilla" : {
    "description" : "kernel: crypto: pcrypt - Fix handling of MAY_BACKLOG requests",
    "id" : "2479812",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2479812"
  },
  "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-770",
  "details" : [ "In the Linux kernel, the following vulnerability has been resolved:\ncrypto: pcrypt - Fix handling of MAY_BACKLOG requests\nMAY_BACKLOG requests can return EBUSY.  Handle them by checking\nfor that value and filtering out EINPROGRESS notifications.", "A flaw was found in the Linux kernel's `pcrypt` component. This vulnerability involves how the system handles certain requests, specifically `MAY_BACKLOG` requests, which can indicate a temporary busy state. If not properly managed, the system's processing of these requests could lead to resource exhaustion or instability." ],
  "affected_release" : [ {
    "product_name" : "Red Hat Enterprise Linux 10",
    "release_date" : "2026-08-20T00:00:00Z",
    "advisory" : "RHSA-2026:57251",
    "cpe" : "cpe:/o:redhat:enterprise_linux:10.2",
    "package" : "kernel-0:6.12.0-211.49.1.el10_2"
  }, {
    "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 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-2026-43493\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-43493\nhttps://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-43493.mbox" ],
  "name" : "CVE-2026-43493",
  "csaw" : false
}