Vulnerability-Lookup

CVE-2025-8860 (GCVE-0-2025-8860)

Vulnerability from cvelistv5 – Published: 2026-02-18 20:49 – Updated: 2026-02-19 14:35

Title

Qemu-kvm: uefi-vars: information disclosure vulnerability in uefi_vars_write callback

Summary

A flaw was found in QEMU in the uefi-vars virtual device. When the guest writes to register UEFI_VARS_REG_BUFFER_SIZE, the .write callback `uefi_vars_write` is invoked. The function allocates a heap buffer without zeroing the memory, leaving the buffer filled with residual data from prior allocations. When the guest later reads from register UEFI_VARS_REG_PIO_BUFFER_TRANSFER, the .read callback `uefi_vars_read` returns leftover metadata or other sensitive process memory from the previously allocated buffer, leading to an information disclosure vulnerability.

Severity ?

3.3 (Low)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

CWE

CWE-212 - Improper Removal of Sensitive Information Before Storage or Transfer

Assigner

fedora

References

URL

Tags

	https://access.redhat.com/security/cve/CVE-2025-8860	vdb-entryx_refsource_REDHAT
	https://bugzilla.redhat.com/show_bug.cgi?id=2387588	issue-trackingx_refsource_REDHAT

Impacted products

Vendor

Product

Version

Affected: 10.0.0 , < 10.1.0 (semver)

Red Hat	Red Hat Enterprise Linux 10	cpe:/o:redhat:enterprise_linux:10
Red Hat	Red Hat Enterprise Linux 6	cpe:/o:redhat:enterprise_linux:6
Red Hat	Red Hat Enterprise Linux 7	cpe:/o:redhat:enterprise_linux:7
Red Hat	Red Hat Enterprise Linux 7	cpe:/o:redhat:enterprise_linux:7
Red Hat	Red Hat Enterprise Linux 8	cpe:/o:redhat:enterprise_linux:8
Red Hat	Red Hat Enterprise Linux 8 Advanced Virtualization	cpe:/a:redhat:advanced_virtualization:8::el8
Red Hat	Red Hat Enterprise Linux 8 Advanced Virtualization	cpe:/a:redhat:advanced_virtualization:8::el8
Red Hat	Red Hat Enterprise Linux 9	cpe:/o:redhat:enterprise_linux:9
Red Hat	Red Hat OpenShift Container Platform 4	cpe:/a:redhat:openshift:4

Credits

Red Hat would like to thank ZDI (zdi-disclosures@trendmicro.com) for reporting this issue.

Show details on NVD website

JSON

To clipboard

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GHSA-XRJ7-V4X4-74HR

Vulnerability from github – Published: 2026-02-18 21:31 – Updated: 2026-02-18 21:31

Details

A flaw was found in QEMU in the uefi-vars virtual device. When the guest writes to register UEFI_VARS_REG_BUFFER_SIZE, the .write callback uefi_vars_write is invoked. The function allocates a heap buffer without zeroing the memory, leaving the buffer filled with residual data from prior allocations. When the guest later reads from register UEFI_VARS_REG_PIO_BUFFER_TRANSFER, the .read callback uefi_vars_read returns leftover metadata or other sensitive process memory from the previously allocated buffer, leading to an information disclosure vulnerability.

Severity ?

3.3 (Low)


                  
                    CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Show details on source website

JSON

To clipboard

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  "modified": "2026-02-18T21:31:23Z",
  "published": "2026-02-18T21:31:23Z",
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}

FKIE_CVE-2025-8860

Vulnerability from fkie_nvd - Published: 2026-02-18 21:16 - Updated: 2026-02-19 15:53

Severity ?

3.3 (Low) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Summary

References

	URL	Tags
	patrick@puiterwijk.org	https://access.redhat.com/security/cve/CVE-2025-8860
	patrick@puiterwijk.org	https://bugzilla.redhat.com/show_bug.cgi?id=2387588

Impacted products

	Vendor	Product	Version

JSON

To clipboard

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          "baseSeverity": "LOW",
          "confidentialityImpact": "LOW",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 1.4,
        "source": "patrick@puiterwijk.org",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-02-18T21:16:22.260",
  "references": [
    {
      "source": "patrick@puiterwijk.org",
      "url": "https://access.redhat.com/security/cve/CVE-2025-8860"
    },
    {
      "source": "patrick@puiterwijk.org",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2387588"
    }
  ],
  "sourceIdentifier": "patrick@puiterwijk.org",
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-212"
        }
      ],
      "source": "patrick@puiterwijk.org",
      "type": "Secondary"
    }
  ]
}

Sightings

Author	Source	Type	Date

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.

Detection rules are retrieved from Rulezet.

Action not permitted

CVE-2025-8860 (GCVE-0-2025-8860)

GHSA-XRJ7-V4X4-74HR

FKIE_CVE-2025-8860

Tags

Sightings

Nomenclature