CVE-2026-53147thunderbolt: Validate XDomain request packet size before type cast
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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In the Linux kernel, the following vulnerability has been resolved: thunderbolt: Validate XDomain request packet size before type cast tb_xdp_handle_request() casts the received packet buffer to protocol-specific structs without verifying that the allocation is large enough for the target type. A peer can send a minimal XDomain packet that passes the generic header length check but is shorter than the struct accessed after the cast, causing out-of- bounds reads from the kmemdup allocation. Plumb the packet length through xdomain_request_work and validate it against the expected struct size before each cast.
- CVSS
- 8.1 HIGH (v3.1, CNA)CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
- Weakness (CWE)
- Not given
- 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 16, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from cdae7c07e3e3509eaabc18c1640a55dc5b99c179 before a770e62923090d7572f1f5a8507ae551d354a057; from cdae7c07e3e3509eaabc18c1640a55dc5b99c179 before 0dd61ba03d05187726ecdf9c0e2175a81b9b24f6; from cdae7c07e3e3509eaabc18c1640a55dc5b99c179 before 79235c8add5da4bf27a12f5a5dbb579f300c059e; from cdae7c07e3e3509eaabc18c1640a55dc5b99c179 before 46da5c3ea011e884028a91cf913db093920a915b; from cdae7c07e3e3509eaabc18c1640a55dc5b99c179 before 07cd2787cdf8942d24a1a3ef81aa89b526fb6381; from cdae7c07e3e3509eaabc18c1640a55dc5b99c179 before a504b9f2797b739e0304d537e8aa4ce883ecce39 | 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 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; 7.1; 7.1; and 4 more ranges | NVD |
References
- https://git.kernel.org/stable/c/a770e62923090d7572f1f5a8507ae551d354a057patch
- https://git.kernel.org/stable/c/0dd61ba03d05187726ecdf9c0e2175a81b9b24f6patch
- https://git.kernel.org/stable/c/79235c8add5da4bf27a12f5a5dbb579f300c059epatch
- https://git.kernel.org/stable/c/46da5c3ea011e884028a91cf913db093920a915bpatch
- https://git.kernel.org/stable/c/07cd2787cdf8942d24a1a3ef81aa89b526fb6381patch
- https://git.kernel.org/stable/c/a504b9f2797b739e0304d537e8aa4ce883ecce39patch
- 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.