High 7.1Published Jun 25, 2026

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

Updated under an hour ago (Oct 26, 2026, 10:40 PM ET)

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No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

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.

CVSS: 7.1 HIGH (v3.1, CNA)CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N
Weakness (CWE): CWE-125
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Modified
Record last updated: Oct 19, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from cdae7c07e3e3509eaabc18c1640a55dc5b99c179 before c55da494dfb445fb28df3a9d293c2be6a299cd01; from cdae7c07e3e3509eaabc18c1640a55dc5b99c179 before 7720654b4842bcdfeb64bc002f6186041849e1e7; from cdae7c07e3e3509eaabc18c1640a55dc5b99c179 before 033dfa63bf6be2653441a1dccae4a8313a91bb9d; from cdae7c07e3e3509eaabc18c1640a55dc5b99c179 before fc261397295b8ad0654cec747b0ec25ea0011995; from cdae7c07e3e3509eaabc18c1640a55dc5b99c179 before a15b6d3136accb2bf84b04d9a3ddd991f7fbf1cb; from cdae7c07e3e3509eaabc18c1640a55dc5b99c179 before b5daa920f44cb582272fc9bfaeb67408776cbaef; from cdae7c07e3e3509eaabc18c1640a55dc5b99c179 before b2c1e5d9f1598cc1a4736d5c6bd1218f90805ee4; from cdae7c07e3e3509eaabc18c1640a55dc5b99c179 before 4db2bd2ed4785dbadaeeab9f4e346b21ac5fb8eb	CNA record
Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem siemens:simatic_s7_1500_tm_mfp_gnu_linux_subsystem (from the name)	all versions	CISA ADP
linux linux_kernel linux:linux_kernel	from 4.15 before 5.10.259; from 5.11 before 5.15.210; from 5.16 before 6.1.176; from 6.2 before 6.6.143; from 6.7 before 6.12.94; from 6.13 before 6.18.36; from 6.19 before 7.0.13; 7.1; and 6 more ranges	NVD

References

References

https://git.kernel.org/stable/c/c55da494dfb445fb28df3a9d293c2be6a299cd01	patch
https://git.kernel.org/stable/c/7720654b4842bcdfeb64bc002f6186041849e1e7	patch
https://git.kernel.org/stable/c/033dfa63bf6be2653441a1dccae4a8313a91bb9d	patch
https://git.kernel.org/stable/c/fc261397295b8ad0654cec747b0ec25ea0011995	patch
https://git.kernel.org/stable/c/a15b6d3136accb2bf84b04d9a3ddd991f7fbf1cb	patch
https://git.kernel.org/stable/c/b5daa920f44cb582272fc9bfaeb67408776cbaef	patch
https://git.kernel.org/stable/c/b2c1e5d9f1598cc1a4736d5c6bd1218f90805ee4	patch
https://git.kernel.org/stable/c/4db2bd2ed4785dbadaeeab9f4e346b21ac5fb8eb	patch
https://cert-portal.siemens.com/productcert/html/ssa-784472.html

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.