Vulnerability-Lookup

ALSA-2026:58571

Vulnerability from osv_almalinux – Published: 2026-08-24 00:00 – Updated: 2026-08-25 08:36 – Source website

Summary

Moderate: qemu-kvm security, bug fix, and enhancement update

Details

Kernel-based Virtual Machine (KVM) is a full virtualization solution for Linux on a variety of architectures. The qemu-kvm packages provide the user-space component for running virtual machines that use KVM.

Security Fix(es):

qemu-kvm: Heap buffer overflow in virtio-blk SCSI request handling (CVE-2026-48914)

Bug Fix(es) and Enhancement(s):

qemu-kvm hung during drain after double pause [almalinux-10.2.z] (JIRA:AlmaLinux-190702)
qemu-img create/convert fails on target block device with 4k sector size [almalinux-10.2.z] (JIRA:AlmaLinux-207389)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

References

URL

Type

	https://access.redhat.com/errata/RHSA-2026:58571	ADVISORY
	https://access.redhat.com/security/cve/CVE-2026-48914	REPORT
	https://bugzilla.redhat.com/2488283	REPORT
	https://errata.almalinux.org/10/ALSA-2026-58571.html	ADVISORY

JSON

To clipboard

{
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        "ecosystem": "AlmaLinux:10",
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      },
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  ],
  "details": "Kernel-based Virtual Machine (KVM) is a full virtualization solution for Linux on a variety of architectures. The qemu-kvm packages provide the user-space component for running virtual machines that use KVM.  \n\nSecurity Fix(es):  \n\n  * qemu-kvm: Heap buffer overflow in virtio-blk SCSI request handling (CVE-2026-48914)\n\n\nBug Fix(es) and Enhancement(s):  \n\n  * qemu-kvm hung during drain after double pause [almalinux-10.2.z] (JIRA:AlmaLinux-190702)\n  * qemu-img create/convert fails on target block device with 4k sector size [almalinux-10.2.z] (JIRA:AlmaLinux-207389)\n\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.\n",
  "id": "ALSA-2026:58571",
  "modified": "2026-08-25T08:36:51Z",
  "published": "2026-08-24T00:00:00Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://access.redhat.com/errata/RHSA-2026:58571"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-48914"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2488283"
    },
    {
      "type": "ADVISORY",
      "url": "https://errata.almalinux.org/10/ALSA-2026-58571.html"
    }
  ],
  "related": [
    "CVE-2026-48914"
  ],
  "summary": "Moderate: qemu-kvm security, bug fix, and enhancement update"
}

CVE-2026-48914 (GCVE-0-2026-48914)

Vulnerability from cvelistv5 – Published: 2026-06-12 09:42 – Updated: 2026-08-31 17:13

Title

Qemu-kvm: heap buffer overflow in virtio-blk scsi request handling

Summary

A flaw was found in QEMU's virtio-blk device. The issue arises because the device does not properly validate the size of input descriptors before writing data. A malicious guest with high privileges could exploit this vulnerability by submitting a malformed virtio-blk SCSI request, leading to an out-of-bounds write in the host heap memory and a potential denial of service (DoS) for the QEMU process.

Severity

6.7 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-06-12 09:57 UTC

CWE

CWE-122 - Heap-based Buffer Overflow

Assigner

redhat redhat root

References

5 references

URL	Tags
https://access.redhat.com/errata/RHSA-2026:39311	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:58571	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2026-48914	vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2488283	issue-trackingx_refsource_REDHAT
https://lore.kernel.org/qemu-devel/20260526154957…

Impacted products

8 products

Vendor	Product	Version
		Affected: 1.1.0 , ≤ 11.0.1 (semver)
Red Hat	Red Hat Enterprise Linux 10	Unaffected: 18:10.1.0-16.el10_2.5 , < * (rpm) cpe:/o:redhat:enterprise_linux:10.2
Red Hat	Red Hat Enterprise Linux 9	Unaffected: 17:10.1.0-17.el9_8.4 , < * (rpm) cpe:/a:redhat:enterprise_linux:9::appstream
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 8	cpe:/o:redhat:enterprise_linux:8
Red Hat	Red Hat Enterprise Linux for NVIDIA 26	cpe:/a:redhat:enterprise_linux_nvidia:
Red Hat	Red Hat OpenShift Container Platform 4	cpe:/a:redhat:openshift:4

Date Public

2026-05-26 00:00

Credits

Red Hat would like to thank Feifan Qian <bea1e@proton.me> for reporting this issue.

Show details on NVD website

JSON

To clipboard

{
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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.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

ALSA-2026:58571

CVE-2026-48914 (GCVE-0-2026-48914)

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