Answer in brief
CVE-2026-31470 records a High severity (CVSS 7.1) vulnerability in virt: tdx-guest: Fix handling of host controlled 'quote' buffer length. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.1. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=f4738f56d1dc62aaba69b33702a5ab098f1b8c63 <a079a62883e3365de592cea9f7a669d8115433b0 || >=f4738f56d1dc62aaba69b33702a5ab098f1b8c63 <6f3c8795ae9ba74fa10fe979293d1904712d3fb1 || >=f4738f56d1dc62aaba69b33702a5ab098f1b8c63 <02ca2d9d197723696cb9cc0cb159eb7e8bf5f89b || >=f4738f56d1dc62aaba69b33702a5ab098f1b8c63 <c3fd16c3b98ed726294feab2f94f876290bf7b61 | a079a62883e3365de592cea9f7a669d8115433b0, 6f3c8795ae9ba74fa10fe979293d1904712d3fb1, 02ca2d9d197723696cb9cc0cb159eb7e8bf5f89b, c3fd16c3b98ed726294feab2f94f876290bf7b61 |
| Linux/Linuxgeneric | 6.7 | Not reported |
Published upstream
Apr 22, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 16, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Oct 16, 2026
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.
Quoted source text, attributed separately from HOL analysis.