{
  "threat_severity" : "Moderate",
  "public_date" : "2025-10-07T00:00:00Z",
  "bugzilla" : {
    "description" : "kernel: scsi: target: iscsi: Fix buffer overflow in lio_target_nacl_info_show()",
    "id" : "2402191",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2402191"
  },
  "cvss3" : {
    "cvss3_base_score" : "6.7",
    "cvss3_scoring_vector" : "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H",
    "status" : "draft"
  },
  "cwe" : "CWE-787",
  "details" : [ "In the Linux kernel, the following vulnerability has been resolved:\nscsi: target: iscsi: Fix buffer overflow in lio_target_nacl_info_show()\nThe function lio_target_nacl_info_show() uses sprintf() in a loop to print\ndetails for every iSCSI connection in a session without checking for the\nbuffer length. With enough iSCSI connections it's possible to overflow the\nbuffer provided by configfs and corrupt the memory.\nThis patch replaces sprintf() with sysfs_emit_at() that checks for buffer\nboundries." ],
  "statement" : "A buffer overflow in lio_target_nacl_info_show() (configfs path) used sprintf() in a loop, allowing writes past the sysfs buffer when many iSCSI connections exist. The fix switches to sysfs_emit_at() which enforces bounds. For the CVSS the PR:H because triggering requires local access to the iSCSI target’s configfs attributes—typically restricted to root/CAP_SYS_ADMIN or dedicated management users.",
  "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" : "Fix deferred",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7",
    "fix_state" : "Fix deferred",
    "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",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8"
  }, {
    "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",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9"
  }, {
    "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-2023-53676\nhttps://nvd.nist.gov/vuln/detail/CVE-2023-53676\nhttps://lore.kernel.org/linux-cve-announce/2025100707-CVE-2023-53676-e7fb@gregkh/T" ],
  "name" : "CVE-2023-53676",
  "csaw" : false
}