CVE-2026-53148

Kernel memory overwrite via oversized XDomain response

Published Jun 25, 2026 · Updated Jun 25, 2026

Out-of-bounds write in Linux Kernel allows physically proximate attackers to corrupt kernel memory through an XDomain response. In tb_xdp_properties_request(), a response-controlled packet length drives memcpy past a kcalloc buffer because it is not clamped to the declared data_length. Reachability requires an attacker-controlled Thunderbolt XDomain peer; the overwrite can crash the kernel or corrupt kernel-resident data, but code execution is not established.

CVSS severity7.8
High
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Out-of-bounds write in Linux Kernel allows physically proximate attackers to corrupt kernel memory through an XDomain response. In tb_xdp_properties_request(), a response-controlled packet length drives memcpy past a kcalloc buffer because it is not clamped to the declared data_length. Reachability requires an attacker-controlled Thunderbolt XDomain peer; the overwrite can crash the kernel or corrupt kernel-resident data, but code execution is not established.

The record

CVE
CVE-2026-53148
Published
Jun 25, 2026
Updated
Jun 25, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-787
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Jun 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 25, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=4.15
  2. Affected versionversion=cdae7c07e3e3509eaabc18c1640a55dc5b99c179 <05a43157676c243c248d1c6d9dcecbe6eba2f35d
  3. Affected versionversion=cdae7c07e3e3509eaabc18c1640a55dc5b99c179 <0b334279a82d79fb4723bd4f614305de1ab69caa
  4. Affected versionversion=cdae7c07e3e3509eaabc18c1640a55dc5b99c179 <322e93448d908434ae5545660fcbe8f5a7a8e141
  5. Affected versionversion=cdae7c07e3e3509eaabc18c1640a55dc5b99c179 <5db10c8ad8c09f72c847dfeef3d876098257f505
  6. Affected versionversion=cdae7c07e3e3509eaabc18c1640a55dc5b99c179 <6021d39ccd979713b39b980286020d8f9a45efd1
  7. Affected versionversion=cdae7c07e3e3509eaabc18c1640a55dc5b99c179 <89ae04365e01d5ae4aae83044a8bbd2a9aaf8d0d
  8. Affected versionversion=cdae7c07e3e3509eaabc18c1640a55dc5b99c179 <906035d5c3784570191d259cbf9a0ac1617852b5
  9. Affected versionversion=cdae7c07e3e3509eaabc18c1640a55dc5b99c179 <fcbd0cdab92838854a5818be7ed8a097164ef6d5

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linux Kernelversion=4.15; version=cdae7c07e3e3509eaabc18c1640a55dc5b99c179 <05a43157676c243c248d1c6d9dcecbe6eba2f35d; version=cdae7c07e3e3509eaabc18c1640a55dc5b99c179 <0b334279a82d79fb4723bd4f614305de1ab69caa; version=cdae7c07e3e3509eaabc18c1640a55dc5b99c179 <322e93448d908434ae5545660fcbe8f5a7a8e141; version=cdae7c07e3e3509eaabc18c1640a55dc5b99c179 <5db10c8ad8c09f72c847dfeef3d876098257f505; version=cdae7c07e3e3509eaabc18c1640a55dc5b99c179 <6021d39ccd979713b39b980286020d8f9a45efd1; version=cdae7c07e3e3509eaabc18c1640a55dc5b99c179 <89ae04365e01d5ae4aae83044a8bbd2a9aaf8d0d; version=cdae7c07e3e3509eaabc18c1640a55dc5b99c179 <906035d5c3784570191d259cbf9a0ac1617852b5; version=cdae7c07e3e3509eaabc18c1640a55dc5b99c179 <fcbd0cdab92838854a5818be7ed8a097164ef6d5

Published CVSS scores

7.0Red HatCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
7.8NIST NVDCVSS: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
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write

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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo