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NVD / CVE Program· CNA Linux

CVE-2026-53146: thunderbolt: Limit XDomain response copy to actual frame size

Noroxi assessment

Priority: Monitor (action score 28/100)

  • 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: 0.26% (FIRST EPSS).
  • Someone on the same network segment can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: Linux Linux 033dfa63bf6be2653441a1dccae4a8313a91bb9d, 4db2bd2ed4785dbadaeeab9f4e346b21ac5fb8eb, 7720654b4842bcdfeb64bc002f6186041849e1e7; 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 033dfa63bf6be2653441a1dccae4a8313a91bb9d, 4db2bd2ed4785dbadaeeab9f4e346b21ac5fb8eb, 7720654b4842bcdfeb64bc002f6186041849e1e7; 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: thunderbolt: Limit XDomain response copy to actual frame size tb_xdomain_copy() copies req->response_size bytes from the received packet buffer regardless of the actual frame size. When a short response arrives, this reads past the valid frame data in the DMA pool buffer into stale contents from previous transactions. Use the minimum of frame size and expected response size for the copy length.

HighCVSS 7.1 · v3.1—No exploit Fix available
Published
Jun 25, 2026
Updated
Oct 19, 2026
EPSS
0.2% · 17th percentile

Report tools

JSON

Action score

28

Monitor

Low priority for now.

CVSS
28 / 40 · 7.1 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · Linux
7.1
NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

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-2026-53146

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

Affected versions

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

  • linux linux kernel4.15 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 kernel7.1

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

    • 4.15affected
    • cdae7c07e3e3509eaabc18c1640a55dc5b99c179 and later · before c55da494dfb445fb28df3a9d293c2be6a299cd01affected · git
    • cdae7c07e3e3509eaabc18c1640a55dc5b99c179 and later · before 7720654b4842bcdfeb64bc002f6186041849e1e7affected · git
    • cdae7c07e3e3509eaabc18c1640a55dc5b99c179 and later · before 033dfa63bf6be2653441a1dccae4a8313a91bb9daffected · git
    • cdae7c07e3e3509eaabc18c1640a55dc5b99c179 and later · before fc261397295b8ad0654cec747b0ec25ea0011995affected · git
    • cdae7c07e3e3509eaabc18c1640a55dc5b99c179 and later · before a15b6d3136accb2bf84b04d9a3ddd991f7fbf1cbaffected · git
    • cdae7c07e3e3509eaabc18c1640a55dc5b99c179 and later · before b5daa920f44cb582272fc9bfaeb67408776cbaefaffected · git
    • cdae7c07e3e3509eaabc18c1640a55dc5b99c179 and later · before b2c1e5d9f1598cc1a4736d5c6bd1218f90805ee4affected · git
    • cdae7c07e3e3509eaabc18c1640a55dc5b99c179 and later · before 4db2bd2ed4785dbadaeeab9f4e346b21ac5fb8ebaffected · git
    • before 4.15not affected · semver

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-2026-53144Jun 25, 2026 · drm/amdkfd: fix NULL dereference in get_queue_ids()
    22Monitor
  • ← EarlierCVE-2026-53145Jun 25, 2026 · drm/gem: Try to fix change_handle ioctl, attempt 4
    31Monitor
  • Later →CVE-2026-53147Jun 25, 2026 · thunderbolt: Validate XDomain request packet size before type cast
    32Monitor

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 Linux033dfa63bf6be2653441a1dccae4a8313a91bb9dVendor (CNA)
Linux Linux4db2bd2ed4785dbadaeeab9f4e346b21ac5fb8ebVendor (CNA)
Linux Linux7720654b4842bcdfeb64bc002f6186041849e1e7Vendor (CNA)
Linux Linuxa15b6d3136accb2bf84b04d9a3ddd991f7fbf1cbVendor (CNA)
Linux Linuxb2c1e5d9f1598cc1a4736d5c6bd1218f90805ee4Vendor (CNA)
Linux Linuxb5daa920f44cb582272fc9bfaeb67408776cbaefVendor (CNA)
Linux Linuxc55da494dfb445fb28df3a9d293c2be6a299cd01Vendor (CNA)
Linux Linuxfc261397295b8ad0654cec747b0ec25ea0011995Vendor (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.

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Someone on the same network segment can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
low · data or configuration can be modified
Availability
none
Attack vector
Adjacent
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
Low
Availability impact
None

Weakness class (CWE)

CWE-125 · Out-of-bounds Read

CVSS vector

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

nvd-secondary

Attack context

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

ATT&CK techniques

—

Change log

  1. SSVC exploitation— → none
  2. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (8 more)

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

All records