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Vulnerability record · CVE-2026-53148 · published 25 June 2026

CVE-2026-53148: Linux kernel out-of-bounds write vulnerability

Linux · Linux Kernel

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.

7.8 CVSS 3.1 High EPSS 0.14% · top 97.5% CWE-787 · Out-of-bounds write
7.8CVSS 3.1 base score
0.14%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
11References
15 Jul 2026Last modified by NVD

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.

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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/05a43157676c243c248d1c6d9dcecbe6eba2f35d Patch
https://git.kernel.org/stable/c/0b334279a82d79fb4723bd4f614305de1ab69caa Patch
https://git.kernel.org/stable/c/322e93448d908434ae5545660fcbe8f5a7a8e141 Patch
https://git.kernel.org/stable/c/5db10c8ad8c09f72c847dfeef3d876098257f505 Patch
https://git.kernel.org/stable/c/6021d39ccd979713b39b980286020d8f9a45efd1 Patch
https://git.kernel.org/stable/c/89ae04365e01d5ae4aae83044a8bbd2a9aaf8d0d Patch
https://git.kernel.org/stable/c/906035d5c3784570191d259cbf9a0ac1617852b5 Patch
https://git.kernel.org/stable/c/fcbd0cdab92838854a5818be7ed8a097164ef6d5 Patch
https://access.redhat.com/security/cve/CVE-2026-53148 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2492756 Third Party Advisory
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-53148.json Third Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2026-53148), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.