CVE-2026-31470

Last refreshed2026-10-17

Status: UPDATED | Advisory ID: CVE-2026-31470

Key Details

CVE	CVE-2026-31470
CVSS Score / Version	7.1 (High) / CVSS v3.1
Updated	2026-10-16
CVSS Vector	`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H`
CVSS Prose	attack vector is local; attack complexity is low; privileges required is low; user interaction is none; scope is unchanged; confidentiality impact is high; integrity impact is none; availability impact is high.
Affected products	Linux Kernel
Classified as	CWE-787 (Out-of-bounds Write)

Vendor	Product	Affected Versions	Patch Status
Linux	Linux Kernel

Vendor

Product

Affected Versions

Patch Status

Linux

Linux Kernel

Subsystems	OT Supporting Infrastructure
Sectors	All Sectors

In the Linux kernel, the following vulnerability has been resolved:

virt: tdx-guest: Fix handling of host controlled 'quote' buffer length

Validate host controlled value `quote_buf->out_len` that determines how

many bytes of the quote are copied out to guest userspace. In TDX

environments with remote attestation, quotes are not considered private,

and can be forwarded to an attestation server.

Catch scenarios where the host specifies a response length larger than

the guest's allocation, or otherwise races modifying the response while

the guest consumes it.

This prevents contents beyond the pages allocated for `quote_buf`

(up to TSM_REPORT_OUTBLOB_MAX) from being read out to guest userspace,

and possibly forwarded in attestation requests.

Recall that some deployments want per-container configs-tsm-report

interfaces, so the leak may cross container protection boundaries, not

just local root. (NVD)

Monitor Linux's web page for any future patch releases.

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2026-31470
CVE	https://www.cve.org/CVERecord?id=CVE-2026-31470

Source

Reference

NVD

CVE