CVE-2023-52762

Local denial of service via truncated DMA size

Published May 21, 2024 · Updated May 11, 2026

Integer overflow in the Linux virtio-blk driver allows local users to cause denial of service through a DMA limit larger than U32_MAX. The driver assigns the size_t return from virtio_max_dma_size() to a u32 max_size value without first clamping it, so oversized values truncate and can become zero. Exploitation requires local low-privilege access and a virtio-blk configuration where the calculated limit exceeds U32_MAX; the exact availability failure mode is not published.

CVSS severity5.5
Medium
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Integer overflow in the Linux virtio-blk driver allows local users to cause denial of service through a DMA limit larger than U32_MAX. The driver assigns the size_t return from virtio_max_dma_size() to a u32 max_size value without first clamping it, so oversized values truncate and can become zero. Exploitation requires local low-privilege access and a virtio-blk configuration where the calculated limit exceeds U32_MAX; the exact availability failure mode is not published.

The record

CVE
CVE-2023-52762
Published
May 21, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-190, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 21, 2024CVE publishedPublication date reported by the CVE source.
  2. May 11, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=5.1
  2. Affected versionversion=fd1068e1860e44aaaa337b516df4518d1ce98da1 <017278f141141367f7d14b203e930b45b6ffffb9
  3. Affected versionversion=fd1068e1860e44aaaa337b516df4518d1ce98da1 <472bd4787406bef2e8b41ee4c74d960a06a49a48
  4. Affected versionversion=fd1068e1860e44aaaa337b516df4518d1ce98da1 <72775cad7f572bb2501f9ea609e1d20e68f0b38b
  5. Affected versionversion=fd1068e1860e44aaaa337b516df4518d1ce98da1 <d667fe301dcbcb12d1d6494fc4b8abee2cb75d90
  6. Affected versionversion=fd1068e1860e44aaaa337b516df4518d1ce98da1 <fafb51a67fb883eb2dde352539df939a251851be

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.1; version=fd1068e1860e44aaaa337b516df4518d1ce98da1 <017278f141141367f7d14b203e930b45b6ffffb9; version=fd1068e1860e44aaaa337b516df4518d1ce98da1 <472bd4787406bef2e8b41ee4c74d960a06a49a48; version=fd1068e1860e44aaaa337b516df4518d1ce98da1 <72775cad7f572bb2501f9ea609e1d20e68f0b38b; version=fd1068e1860e44aaaa337b516df4518d1ce98da1 <d667fe301dcbcb12d1d6494fc4b8abee2cb75d90; version=fd1068e1860e44aaaa337b516df4518d1ce98da1 <fafb51a67fb883eb2dde352539df939a251851be

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-190Integer Overflow or Wraparound
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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