CVE-2026-53195

Kernel memory corruption via unchecked firmware length

Published Jun 25, 2026 · Updated Jun 25, 2026

Heap-based buffer overflow in the Linux Kernel io_ti USB serial driver allows local users to corrupt kernel memory via crafted firmware. build_i2c_fw_hdr() copies the firmware-controlled img_header->Length into a fixed-size heap buffer without checking the remaining space after the record header. Exploitation requires local low-privileged access and delivery of the image to the driver; successful corruption can expose or modify data and crash the host.

CVSS severity7.8
High
EPSS probability0.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap-based buffer overflow in the Linux Kernel io_ti USB serial driver allows local users to corrupt kernel memory via crafted firmware. build_i2c_fw_hdr() copies the firmware-controlled img_header->Length into a fixed-size heap buffer without checking the remaining space after the record header. Exploitation requires local low-privileged access and delivery of the image to the driver; successful corruption can expose or modify data and crash the host.

The record

CVE
CVE-2026-53195
Published
Jun 25, 2026
Updated
Jun 25, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-787, T1068
Attack vector
local
Privileges
authenticated

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

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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=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <0fd2b00b2d3d05e3eaa13342b3dfb0fa85c226ae
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <130d6567eb148040eed1b73e1414ad6c27d22bd5
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <294692d3296eee3391c348d7ea6401916d27806c
  4. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <2fd64bf0ad66ab5de0c73524591d879427ba5aba
  5. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <3e187152f44d76d7633a3855ffd0099e1588b82a
  6. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <4cb722747ed25971f35cc47ce5c0e79d7f717713
  7. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <5a79b634ee58786ca627268daefa7744f2af2e14
  8. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <b7faf660eefa2047ebc2959ff76da2b6eae2e9e3
  9. Affected versionversion=2.6.12

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <0fd2b00b2d3d05e3eaa13342b3dfb0fa85c226ae; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <130d6567eb148040eed1b73e1414ad6c27d22bd5; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <294692d3296eee3391c348d7ea6401916d27806c; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <2fd64bf0ad66ab5de0c73524591d879427ba5aba; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <3e187152f44d76d7633a3855ffd0099e1588b82a; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <4cb722747ed25971f35cc47ce5c0e79d7f717713; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <5a79b634ee58786ca627268daefa7744f2af2e14; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <b7faf660eefa2047ebc2959ff76da2b6eae2e9e3; version=2.6.12

Published CVSS scores

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.

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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-787Out-of-bounds Write
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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