FKIE_CVE-2018-15572

Vulnerability from fkie_nvd - Published: 2018-08-20 02:29 - Updated: 2026-06-17 01:42
Severity
6.5 (Medium) - CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
Summary
The spectre_v2_select_mitigation function in arch/x86/kernel/cpu/bugs.c in the Linux kernel before 4.18.1 does not always fill RSB upon a context switch, which makes it easier for attackers to conduct userspace-userspace spectreRSB attacks.
References
cve@mitre.orghttp://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=fdf82a7856b32d905c39afc85e34364491e46346Mitigation, Patch, Vendor Advisory
cve@mitre.orghttps://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.18.1Mitigation, Patch, Vendor Advisory
cve@mitre.orghttps://github.com/torvalds/linux/commit/fdf82a7856b32d905c39afc85e34364491e46346Mitigation, Patch, Third Party Advisory
cve@mitre.orghttps://lists.debian.org/debian-lts-announce/2018/10/msg00003.htmlMailing List, Third Party Advisory
cve@mitre.orghttps://usn.ubuntu.com/3775-1/Third Party Advisory
cve@mitre.orghttps://usn.ubuntu.com/3775-2/Third Party Advisory
cve@mitre.orghttps://usn.ubuntu.com/3776-1/Third Party Advisory
cve@mitre.orghttps://usn.ubuntu.com/3776-2/Third Party Advisory
cve@mitre.orghttps://usn.ubuntu.com/3777-1/Third Party Advisory
cve@mitre.orghttps://usn.ubuntu.com/3777-2/Third Party Advisory
cve@mitre.orghttps://usn.ubuntu.com/3777-3/Third Party Advisory
cve@mitre.orghttps://www.debian.org/security/2018/dsa-4308Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=fdf82a7856b32d905c39afc85e34364491e46346Mitigation, Patch, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.18.1Mitigation, Patch, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/torvalds/linux/commit/fdf82a7856b32d905c39afc85e34364491e46346Mitigation, Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2018/10/msg00003.htmlMailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://usn.ubuntu.com/3775-1/Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://usn.ubuntu.com/3775-2/Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://usn.ubuntu.com/3776-1/Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://usn.ubuntu.com/3776-2/Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://usn.ubuntu.com/3777-1/Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://usn.ubuntu.com/3777-2/Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://usn.ubuntu.com/3777-3/Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.debian.org/security/2018/dsa-4308Third Party Advisory
Impacted products
Vendor Product Version
debian debian_linux 8.0
debian debian_linux 9.0
canonical ubuntu_linux 12.04
canonical ubuntu_linux 14.04
canonical ubuntu_linux 16.04
canonical ubuntu_linux 18.04
linux linux_kernel *
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "source": "cve@mitre.org"
    }
  ],
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  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "The spectre_v2_select_mitigation function in arch/x86/kernel/cpu/bugs.c in the Linux kernel before 4.18.1 does not always fill RSB upon a context switch, which makes it easier for attackers to conduct userspace-userspace spectreRSB attacks."
    },
    {
      "lang": "es",
      "value": "La funci\u00f3n spectre_v2_select_mitigation en arch/x86/kernel/cpu/bugs.c en el kernel de Linux en versiones anteriores a la 4.18.1 no siempre completa RSB en un cambio de contexto, lo que hace que sea m\u00e1s f\u00e1cil para los atacantes realizar ataques spectreRSB espacio de usuario-espacio de usuario."
    }
  ],
  "id": "CVE-2018-15572",
  "lastModified": "2026-06-17T01:42:46.340",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "LOW",
        "cvssData": {
          "accessComplexity": "LOW",
          "accessVector": "LOCAL",
          "authentication": "NONE",
          "availabilityImpact": "NONE",
          "baseScore": 2.1,
          "confidentialityImpact": "PARTIAL",
          "integrityImpact": "NONE",
          "vectorString": "AV:L/AC:L/Au:N/C:P/I:N/A:N",
          "version": "2.0"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 2.9,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
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          "baseScore": 6.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "CHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N",
          "version": "3.0"
        },
        "exploitabilityScore": 2.0,
        "impactScore": 4.0,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2018-08-20T02:29:00.263",
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  "vulnStatus": "Modified",
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          "value": "NVD-CWE-noinfo"
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  ]
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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