CVE-2026-53148
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…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.14%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.14% probability · 3th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-787
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
EPSS 0.1% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://git.kernel.org/stable/c/05a43157676c243c248d1c6d9dcecbe6eba2f35dPatch
- https://git.kernel.org/stable/c/0b334279a82d79fb4723bd4f614305de1ab69caaPatch
- https://git.kernel.org/stable/c/322e93448d908434ae5545660fcbe8f5a7a8e141Patch
- https://git.kernel.org/stable/c/5db10c8ad8c09f72c847dfeef3d876098257f505Patch
- https://git.kernel.org/stable/c/6021d39ccd979713b39b980286020d8f9a45efd1Patch
- https://git.kernel.org/stable/c/89ae04365e01d5ae4aae83044a8bbd2a9aaf8d0dPatch
- https://git.kernel.org/stable/c/906035d5c3784570191d259cbf9a0ac1617852b5Patch
- https://git.kernel.org/stable/c/fcbd0cdab92838854a5818be7ed8a097164ef6d5Patch
- https://access.redhat.com/security/cve/CVE-2026-53148Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2492756Third Party Advisory
- https://cert-portal.siemens.com/productcert/html/ssa-784472.html
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-53148.jsonThird Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.