{
  "threat_severity" : "Important",
  "public_date" : "2026-05-06T00:00:00Z",
  "bugzilla" : {
    "description" : "kernel: fs/smb/client: fix out-of-bounds read in cifs_sanitize_prepath",
    "id" : "2467015",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2467015"
  },
  "cvss3" : {
    "cvss3_base_score" : "8.1",
    "cvss3_scoring_vector" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
    "status" : "verified"
  },
  "cwe" : "CWE-125",
  "details" : [ "In the Linux kernel, the following vulnerability has been resolved:\nfs/smb/client: fix out-of-bounds read in cifs_sanitize_prepath\nWhen cifs_sanitize_prepath is called with an empty string or a string\ncontaining only delimiters (e.g., \"/\"), the current logic attempts to\ncheck *(cursor2 - 1) before cursor2 has advanced. This results in an\nout-of-bounds read.\nThis patch adds an early exit check after stripping prepended\ndelimiters. If no path content remains, the function returns NULL.\nThe bug was identified via manual audit and verified using a\nstandalone test case compiled with AddressSanitizer, which\ntriggered a SEGV on affected inputs.", "A flaw was found in the Linux kernel's CIFS (Common Internet File System) client. When the `cifs_sanitize_prepath` function processes specially crafted input, such as an empty string or a string containing only delimiters, it can attempt to read data beyond its allocated memory buffer. This out-of-bounds read can lead to a system crash, resulting in a denial of service." ],
  "statement" : "An Important out-of-bounds read flaw in the Linux kernel's CIFS client can lead to a system crash and denial of service. This vulnerability, present in Red Hat Enterprise Linux 8, 9, and 10, and Red Hat In-Vehicle OS 2, can be triggered by processing specially crafted input to the `cifs_sanitize_prepath` function, potentially disrupting system availability.",
  "affected_release" : [ {
    "product_name" : "Red Hat Enterprise Linux 10",
    "release_date" : "2026-07-02T00:00:00Z",
    "advisory" : "RHSA-2026:34911",
    "cpe" : "cpe:/o:redhat:enterprise_linux:10.2",
    "package" : "kernel-0:6.12.0-211.30.1.el10_2"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "release_date" : "2026-07-07T00:00:00Z",
    "advisory" : "RHSA-2026:36365",
    "cpe" : "cpe:/a:redhat:enterprise_linux:8::nfv",
    "package" : "kernel-rt-0:4.18.0-553.141.1.rt7.482.el8_10"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "release_date" : "2026-07-07T00:00:00Z",
    "advisory" : "RHSA-2026:36366",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8",
    "package" : "kernel-0:4.18.0-553.141.1.el8_10"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "release_date" : "2026-07-06T00:00:00Z",
    "advisory" : "RHSA-2026:36018",
    "cpe" : "cpe:/a:redhat:enterprise_linux:9",
    "package" : "kernel-0:5.14.0-687.22.1.el9_8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "release_date" : "2026-07-06T00:00:00Z",
    "advisory" : "RHSA-2026:36018",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9",
    "package" : "kernel-0:5.14.0-687.22.1.el9_8"
  }, {
    "product_name" : "Red Hat OpenShift Container Platform 4.22",
    "release_date" : "2026-07-21T00:00:00Z",
    "advisory" : "RHSA-2026:40764",
    "cpe" : "cpe:/a:redhat:openshift:4.22::el9",
    "package" : "rhcos-4.22.9.8.202607152026-0"
  } ],
  "package_state" : [ {
    "product_name" : "Red Hat Enterprise Linux 10",
    "fix_state" : "Not affected",
    "package_name" : "libkrun",
    "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 9",
    "fix_state" : "Fix deferred",
    "package_name" : "kernel-rt",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9"
  } ],
  "references" : [ "https://www.cve.org/CVERecord?id=CVE-2026-43112\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-43112\nhttps://lore.kernel.org/linux-cve-announce/2026050625-CVE-2026-43112-f37f@gregkh/T" ],
  "name" : "CVE-2026-43112",
  "csaw" : false
}