ubuntu-cve-2017-17426
Vulnerability from osv_ubuntu
Published
2017-12-05 00:00
Modified
2025-07-16 04:53
Summary
Details

The malloc function in the GNU C Library (aka glibc or libc6) 2.26 could return a memory block that is too small if an attempt is made to allocate an object whose size is close to SIZE_MAX, potentially leading to a subsequent heap overflow. This occurs because the per-thread cache (aka tcache) feature enables a code path that lacks an integer overflow check.

Severity
8.1 (High)
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
N/A (UNKNOWN)
medium
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "glibc-doc",
            "binary_version": "2.27-3ubuntu1"
          },
          {
            "binary_name": "glibc-source",
            "binary_version": "2.27-3ubuntu1"
          },
          {
            "binary_name": "libc-bin",
            "binary_version": "2.27-3ubuntu1"
          },
          {
            "binary_name": "libc-bin-dbgsym",
            "binary_version": "2.27-3ubuntu1"
          },
          {
            "binary_name": "libc-dev-bin",
            "binary_version": "2.27-3ubuntu1"
          },
          {
            "binary_name": "libc-dev-bin-dbgsym",
            "binary_version": "2.27-3ubuntu1"
          },
          {
            "binary_name": "libc6",
            "binary_version": "2.27-3ubuntu1"
          },
          {
            "binary_name": "libc6-amd64",
            "binary_version": "2.27-3ubuntu1"
          },
          {
            "binary_name": "libc6-amd64-dbgsym",
            "binary_version": "2.27-3ubuntu1"
          },
          {
            "binary_name": "libc6-armel",
            "binary_version": "2.27-3ubuntu1"
          },
          {
            "binary_name": "libc6-armel-dbgsym",
            "binary_version": "2.27-3ubuntu1"
          },
          {
            "binary_name": "libc6-dbg",
            "binary_version": "2.27-3ubuntu1"
          },
          {
            "binary_name": "libc6-dev",
            "binary_version": "2.27-3ubuntu1"
          },
          {
            "binary_name": "libc6-dev-amd64",
            "binary_version": "2.27-3ubuntu1"
          },
          {
            "binary_name": "libc6-dev-armel",
            "binary_version": "2.27-3ubuntu1"
          },
          {
            "binary_name": "libc6-dev-i386",
            "binary_version": "2.27-3ubuntu1"
          },
          {
            "binary_name": "libc6-dev-s390",
            "binary_version": "2.27-3ubuntu1"
          },
          {
            "binary_name": "libc6-dev-x32",
            "binary_version": "2.27-3ubuntu1"
          },
          {
            "binary_name": "libc6-i386",
            "binary_version": "2.27-3ubuntu1"
          },
          {
            "binary_name": "libc6-i386-dbgsym",
            "binary_version": "2.27-3ubuntu1"
          },
          {
            "binary_name": "libc6-pic",
            "binary_version": "2.27-3ubuntu1"
          },
          {
            "binary_name": "libc6-s390",
            "binary_version": "2.27-3ubuntu1"
          },
          {
            "binary_name": "libc6-s390-dbgsym",
            "binary_version": "2.27-3ubuntu1"
          },
          {
            "binary_name": "libc6-udeb",
            "binary_version": "2.27-3ubuntu1"
          },
          {
            "binary_name": "libc6-x32",
            "binary_version": "2.27-3ubuntu1"
          },
          {
            "binary_name": "libc6-x32-dbgsym",
            "binary_version": "2.27-3ubuntu1"
          },
          {
            "binary_name": "locales",
            "binary_version": "2.27-3ubuntu1"
          },
          {
            "binary_name": "locales-all",
            "binary_version": "2.27-3ubuntu1"
          },
          {
            "binary_name": "multiarch-support",
            "binary_version": "2.27-3ubuntu1"
          },
          {
            "binary_name": "nscd",
            "binary_version": "2.27-3ubuntu1"
          },
          {
            "binary_name": "nscd-dbgsym",
            "binary_version": "2.27-3ubuntu1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "glibc",
        "purl": "pkg:deb/ubuntu/glibc@2.27-3ubuntu1?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.27-3ubuntu1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.26-0ubuntu2",
        "2.26-0ubuntu2.1",
        "2.27-0ubuntu2",
        "2.27-0ubuntu3"
      ]
    }
  ],
  "aliases": [],
  "details": "The malloc function in the GNU C Library (aka glibc or libc6) 2.26 could return a memory block that is too small if an attempt is made to allocate an object whose size is close to SIZE_MAX, potentially leading to a subsequent heap overflow. This occurs because the per-thread cache (aka tcache) feature enables a code path that lacks an integer overflow check.",
  "id": "UBUNTU-CVE-2017-17426",
  "modified": "2025-07-16T04:53:10Z",
  "published": "2017-12-05T00:00:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2017-17426"
    },
    {
      "type": "REPORT",
      "url": "https://sourceware.org/bugzilla/show_bug.cgi?id=22375"
    },
    {
      "type": "REPORT",
      "url": "https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=34697694e8a93b325b18f25f7dcded55d6baeaf6"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-3534-1"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2017-17426"
    }
  ],
  "related": [
    "USN-3534-1"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2017-17426"
  ],
  "withdrawn": "2025-07-18T16:44:16Z"
}



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