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Fencer Vulns
medium 6.0

CVE-2023-1544 json

Qemu: pvrdma: out-of-bounds read in pvrdma_ring_next_elem_read()

published 2023-03-23 3 y ago modified 2026-06-17 4 mo ago also EUVD-2023-23779

cvss
6.0
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 23%
public exploits
0
none known

Summary

A flaw was found in the QEMU implementation of VMWare's paravirtual RDMA device. This flaw allows a crafted guest driver to allocate and initialize a huge number of page tables to be used as a ring of descriptors for CQ and async events, potentially leading to an out-of-bounds read and crash of QEMU.

Patch / fix

  • qemu rdma 8.2.0
  • qemu Debian 12 1:7.2+dfsg-7+deb12u3
  • qemu Debian 14, Debian 13 1:8.2.0+ds-1

debian advisories DEBIAN-CVE-2023-1544

  • qemu Ubuntu 20.04 LTS 1:4.2-3ubuntu6.28
  • qemu Ubuntu 22.04 LTS 1:6.2+dfsg-2ubuntu6.16

ubuntu advisories UBUNTU-CVE-2023-1544

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • qemu SLE Micro 5.2 5.2.0-150300.138.1
  • qemu SLES for SAP 15 SP4, SLES 15 SP4-LTSS, SLE Micro 5.4 +5 more 6.2.0-150400.37.46.1
  • qemu SLE Module for Server Applications 15 SP5, SLE Module for Package Hub 15 SP5, SLE Module for Basesystem 15 SP5 +2 more 7.1.0-150500.49.12.1
  • qemu SLES LTSS Extended Security 12 SP5, SLES 12 SP5-LTSS 3.1.1.1-84.1
  • qemu SLES LTSS Extended Security 12 SP5, SLES 12 SP5-LTSS 3.1.1.1-81.1

suse advisories SUSE-SU-2026:2406-1SUSE-SU-2026:0070-1SUSE-SU-2026:0043-1SUSE-SU-2025:4523-1SUSE-SU-2024:1103-1

  • qemu CBL-Mariner 2.0 6.2.0-23
  • qemu Azure Linux 3.0 8.2.0-1

azure linux advisories AZL-25807AZL-35166

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2023-1544 updated cvss 6.0

QEMU: pvrdma: out-of-bounds read in pvrdma_ring_next_elem_read()

  • Red Hat Enterprise Linux 6 qemu-img, qemu-kvm, qemu-kvm-tools, qemu-guest-agent, qemu-guest-agent-win32 Red Hat Enterprise Linux 7 qemu-img, qemu-kvm, libcacard, qemu-img-ma, qemu-kvm-ma, qemu-kvm-tools, +5 more Red Hat Enterprise Linux 8 qemu-img, qemu-kvm, qemu-kvm-core, qemu-kvm-tests, qemu-kvm-common, qemu-guest-agent, +8 more Red Hat Enterprise Linux 8 Advanced Virtualization qemu-img, qemu-kvm, qemu-kiwi, qemu-kvm-core, qemu-kvm-tests, qemu-kvm-common, +9 more Red Hat Enterprise Linux 9 qemu-img, qemu-kvm, qemu-kvm-core, qemu-kvm-tools, qemu-pr-helper, qemu-kvm-common, +16 more Red Hat OpenStack Platform 13 (Queens) qemu-img-rhev, qemu-kvm-rhev, qemu-kvm-tools-rhev, qemu-kvm-common-rhev
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
2 y ago

Exploit prediction

0.31% chance of exploitation in the next 30 days, higher than 23% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 6.0 CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H
NVD 3.1 6.3 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:N/I:N/A:H

Affected products

  • qemu rdma

Classification

Weakness
  • CWE-125 Out-of-bounds Read
  • CWE-770 Allocation of Resources Without Limits or Throttling

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.