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Vulnerability record · CVE-2026-53147 · published 25 June 2026

CVE-2026-53147: Linux kernel out-of-bounds read vulnerability

Linux · Linux Kernel

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.

8.1 CVSS 3.1 High EPSS 0.27% · top 83.1% CWE-125 · Out-of-bounds read
8.1CVSS 3.1 base score
0.27%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
6References
6 Jul 2026Last modified by NVD

Description

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://git.kernel.org/stable/c/07cd2787cdf8942d24a1a3ef81aa89b526fb6381 Patch
https://git.kernel.org/stable/c/0dd61ba03d05187726ecdf9c0e2175a81b9b24f6 Patch
https://git.kernel.org/stable/c/46da5c3ea011e884028a91cf913db093920a915b Patch
https://git.kernel.org/stable/c/79235c8add5da4bf27a12f5a5dbb579f300c059e Patch
https://git.kernel.org/stable/c/a504b9f2797b739e0304d537e8aa4ce883ecce39 Patch
https://git.kernel.org/stable/c/a770e62923090d7572f1f5a8507ae551d354a057 Patch

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Source: NIST National Vulnerability Database (record CVE-2026-53147), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.