CVE-2017-7518 (GCVE-0-2017-7518)

Vulnerability from cvelistv5 – Published: 2018-07-30 13:00 – Updated: 2024-08-05 16:04
VLAI
Summary
A flaw was found in the Linux kernel before version 4.12 in the way the KVM module processed the trap flag(TF) bit in EFLAGS during emulation of the syscall instruction, which leads to a debug exception(#DB) being raised in the guest stack. A user/process inside a guest could use this flaw to potentially escalate their privileges inside the guest. Linux guests are not affected by this.
Severity
5.5 (Medium)
CVSS:3.0/AV:A/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
CWE
Assigner
redhat CNA under the redhat root
CNA scorecard B 82/100 over 1045 records in the last 180 days details
References
URL Tags
https://access.redhat.com/errata/RHSA-2018:0412 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/articles/3290921 x_refsource_CONFIRM
https://usn.ubuntu.com/3619-2/ vendor-advisoryx_refsource_UBUNTU
https://access.redhat.com/errata/RHSA-2018:0395 vendor-advisoryx_refsource_REDHAT
https://usn.ubuntu.com/3754-1/ vendor-advisoryx_refsource_UBUNTU
http://www.securitytracker.com/id/1038782 vdb-entryx_refsource_SECTRACK
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2… x_refsource_CONFIRM
http://www.openwall.com/lists/oss-security/2017/06/23/5 mailing-listx_refsource_MLIST
https://usn.ubuntu.com/3619-1/ vendor-advisoryx_refsource_UBUNTU
https://www.debian.org/security/2017/dsa-3981 vendor-advisoryx_refsource_DEBIAN
https://www.spinics.net/lists/kvm/msg151817.html mailing-listx_refsource_MLIST
http://www.securityfocus.com/bid/99263 vdb-entryx_refsource_BID
Impacted products
Vendor Product Version CPE status
[UNKNOWN] Kernel: Affected: 4.12
guessed Create a notification for this product.
Date Public
2017-06-22 00:00
Show details on NVD website
To clipboard 

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          }
        ],
        "sourceIdentifier": "secalert@redhat.com",
        "vulnStatus": "Modified",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-250"
              }
            ],
            "source": "secalert@redhat.com",
            "type": "Secondary"
          },
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-755"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
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        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-06-30T11:30:03+00:00",
      "cve": "CVE-2017-7518",
      "id": "CVE-2017-7518",
      "initial_release_date": "2017-06-22T00:00:00+00:00",
      "product_status:fixed": "191",
      "product_status:known_not_affected": "43",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "Kernel: KVM: debug exception via syscall emulation",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2017/cve-2017-7518.json",
      "version": "3"
    }
  }
}



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