What’s Vulnerable › Vulnerabilities

CVE-2026-53148: thunderbolt: Clamp XDomain response data copy to allocation size

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-06-25 · updated 2026-10-15
• Weakness: CWE-787

Description

In the Linux kernel, the following vulnerability has been resolved: thunderbolt: Clamp XDomain response data copy to allocation size tb_xdp_properties_request() derives the per-packet copy length from the response header without checking that it fits in the previously allocated data buffer. A malicious peer can set its length field larger than the declared data_length, causing memcpy to write past the kcalloc allocation. Clamp the per-packet copy length so that the cumulative offset never exceeds data_len.

Affected products

• 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 — fixed in 5.10.259, 5.15.210, 6.1.176, 6.12.94, 6.18.36, 6.6.143

How to fix

Upgrade to a fixed version: Linux kernel 5.10.259, 5.15.210, 6.1.176, 6.12.94. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/05a43157676c243c248d1c6d9dcecbe6eba2f35d
• https://git.kernel.org/stable/c/0b334279a82d79fb4723bd4f614305de1ab69caa
• https://git.kernel.org/stable/c/322e93448d908434ae5545660fcbe8f5a7a8e141
• https://git.kernel.org/stable/c/5db10c8ad8c09f72c847dfeef3d876098257f505
• https://git.kernel.org/stable/c/6021d39ccd979713b39b980286020d8f9a45efd1
• https://git.kernel.org/stable/c/89ae04365e01d5ae4aae83044a8bbd2a9aaf8d0d
• https://git.kernel.org/stable/c/906035d5c3784570191d259cbf9a0ac1617852b5
• https://git.kernel.org/stable/c/fcbd0cdab92838854a5818be7ed8a097164ef6d5
• https://access.redhat.com/security/cve/CVE-2026-53148
• https://bugzilla.redhat.com/show_bug.cgi?id=2492756
• https://cert-portal.siemens.com/productcert/html/ssa-784472.html
• https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-53148.json

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