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NVD / CVE Program· CNA Linux

CVE-2026-53195: USB: serial: io_ti: fix heap overflow in build_i2c_fw_hdr()

HighCVSS 7.8 · v3.1—No exploit Fix available

Noroxi assessment

Priority: Monitor (action score 31/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.14% (FIRST EPSS).
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: Linux Linux 0fd2b00b2d3d05e3eaa13342b3dfb0fa85c226ae, 130d6567eb148040eed1b73e1414ad6c27d22bd5, 294692d3296eee3391c348d7ea6401916d27806c; azl3 kernel 6.6.141.1-1 on Azure Linux 3.0 6.6.143.1-1.

Low priority for now. Upgrade to Linux Linux 0fd2b00b2d3d05e3eaa13342b3dfb0fa85c226ae, 130d6567eb148040eed1b73e1414ad6c27d22bd5, 294692d3296eee3391c348d7ea6401916d27806c; azl3 kernel 6.6.141.1-1 on Azure Linux 3.0 6.6.143.1-1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

In the Linux kernel, the following vulnerability has been resolved: USB: serial: io_ti: fix heap overflow in build_i2c_fw_hdr() build_i2c_fw_hdr() allocates a fixed-size buffer of (16*1024 - 512) + sizeof(struct ti_i2c_firmware_rec) bytes, then copies le16_to_cpu(img_header->Length) bytes into it without validating that Length fits within the available space after the firmware record header. img_header->Length is a __le16 from the firmware file and can be up to 65535. check_fw_sanity() validates the total firmware size but not img_header->Length specifically. Fix by rejecting images where img_header->Length exceeds the available destination space.

Published
Jun 25, 2026
Updated
Nov 6, 2026
EPSS
0.1% · 3th percentile

Report tools

JSON

Action score

31

Monitor

Low priority for now.

CVSS
31 / 40 · 7.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2026-53195

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
linuxlinux kernel

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • 2.6.12affected
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 3e187152f44d76d7633a3855ffd0099e1588b82aaffected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before b7faf660eefa2047ebc2959ff76da2b6eae2e9e3affected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 2fd64bf0ad66ab5de0c73524591d879427ba5abaaffected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 4cb722747ed25971f35cc47ce5c0e79d7f717713affected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 130d6567eb148040eed1b73e1414ad6c27d22bd5affected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 294692d3296eee3391c348d7ea6401916d27806caffected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 5a79b634ee58786ca627268daefa7744f2af2e14affected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 0fd2b00b2d3d05e3eaa13342b3dfb0fa85c226aeaffected · git
    • before 2.6.12not affected · semver
Affected versions · NVD (9)

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • linux linux kernel2.6.12.1 and later · before 5.10.259
  • linux linux kernel5.11 and later · before 5.15.210
  • linux linux kernel5.16 and later · before 6.1.176
  • linux linux kernel6.2 and later · before 6.6.143
  • linux linux kernel6.7 and later · before 6.12.94
  • linux linux kernel6.13 and later · before 6.18.36
  • linux linux kernel6.19 and later · before 7.0.13
  • linux linux kernel2.6.12
  • linux linux kernel7.1

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.176-16.1.176-1
Debian:13linuxbefore 6.12.94-16.12.94-1
Debian:14linuxbefore 7.0.13-17.0.13-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-31431crypto: algif_aead - Revert to operating out-of-placeKEV
    90Now
  • CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe…KEV
    89Now
  • CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV
    85Now

Published before and after this one in the same product

  • ← EarlierCVE-2026-53193Jun 25, 2026 · ALSA: timer: Forcibly close timer instances at closing
    31Monitor
  • ← EarlierCVE-2026-53194Jun 25, 2026 · USB: serial: kl5kusb105: fix bulk-out buffer overflow
    31Monitor
  • Later →CVE-2026-53196Jun 25, 2026 · USB: serial: io_ti: fix heap overflow in get_manuf_info()
    27Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux0fd2b00b2d3d05e3eaa13342b3dfb0fa85c226aeVendor (CNA)
Linux Linux130d6567eb148040eed1b73e1414ad6c27d22bd5Vendor (CNA)
Linux Linux294692d3296eee3391c348d7ea6401916d27806cVendor (CNA)
Linux Linux2fd64bf0ad66ab5de0c73524591d879427ba5abaVendor (CNA)
Linux Linux3e187152f44d76d7633a3855ffd0099e1588b82aVendor (CNA)
Linux Linux4cb722747ed25971f35cc47ce5c0e79d7f717713Vendor (CNA)
Linux Linux5a79b634ee58786ca627268daefa7744f2af2e14Vendor (CNA)
Linux Linuxb7faf660eefa2047ebc2959ff76da2b6eae2e9e3Vendor (CNA)
azl3 kernel 6.6.141.1-1 on Azure Linux 3.06.6.143.1-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
debian:linux6.1.176-1 · Debian:12Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

Not on record for this CVE: EPSS history · patch commit or PR link · researcher credit · variant or chain candidate · public bounty program.

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-787 · Out-of-bounds Write

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

References

Show all references (7 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records