CVE-2023-53080

Kernel memory corruption via truncated UMEM chunk count

Published May 2, 2025 · Updated Aug 5, 2026

Integer overflow in Linux kernel AF_XDP UMEM registration from 4.18 allows local users to corrupt kernel memory via a crafted UMEM size. xdp_umem_reg stores the calculated chunk count in a u32 without rejecting overflow, undersizing the heads array while retaining the full UMEM length. Access requires CAP_NET_RAW in the applicable user and network namespace plus sufficient memory locking; crafted fill-queue addresses can read or write adjacent kernel heap data or panic the host.

CVSS severity7.8
High
EPSS probability0.22%
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 Linux kernel AF_XDP UMEM registration from 4.18 allows local users to corrupt kernel memory via a crafted UMEM size. xdp_umem_reg stores the calculated chunk count in a u32 without rejecting overflow, undersizing the heads array while retaining the full UMEM length. Access requires CAP_NET_RAW in the applicable user and network namespace plus sufficient memory locking; crafted fill-queue addresses can read or write adjacent kernel heap data or panic the host.

The record

CVE
CVE-2023-53080
Published
May 2, 2025
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 2, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 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=4.18
  2. Affected versionversion=bbff2f321a864ee07c9d3d1245af498023146951 <3cfc3564411acf96bf2fb791f706a1aa4f872c1d
  3. Affected versionversion=bbff2f321a864ee07c9d3d1245af498023146951 <580634b03a55f04a3c1968bcbd97736c079c6601
  4. Affected versionversion=bbff2f321a864ee07c9d3d1245af498023146951 <a069909acc4435eeb41d05ccc03baa447cc01b7e
  5. Affected versionversion=bbff2f321a864ee07c9d3d1245af498023146951 <bb2e3bfb2a79db0c2057c6f701b782954394c67f
  6. Affected versionversion=bbff2f321a864ee07c9d3d1245af498023146951 <c7df4813b149362248d6ef7be41a311e27bf75fe

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.18; version=bbff2f321a864ee07c9d3d1245af498023146951 <3cfc3564411acf96bf2fb791f706a1aa4f872c1d; version=bbff2f321a864ee07c9d3d1245af498023146951 <580634b03a55f04a3c1968bcbd97736c079c6601; version=bbff2f321a864ee07c9d3d1245af498023146951 <a069909acc4435eeb41d05ccc03baa447cc01b7e; version=bbff2f321a864ee07c9d3d1245af498023146951 <bb2e3bfb2a79db0c2057c6f701b782954394c67f; version=bbff2f321a864ee07c9d3d1245af498023146951 <c7df4813b149362248d6ef7be41a311e27bf75fe

Published CVSS scores

5.5NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
7.8Linux kernel CVE teamCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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

T1068Exploitation for Privilege Escalation

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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