# CVE-2026-68480 — Linux

> As of 2026-08-18, CVE-2026-68480 is a vulnerability in Linux, EPSS 0.2% (13.1th percentile). Threadlinqs Intelligence links 1 tracked threat campaign to CVE-2026-68480, most recently “TONTOU: Interrupt-Injection Attack Bypasses Spectre v2 (eIBRS/Safe RET) Defenses on Intel and AMD CPUs”.

**Last updated:** 2026-08-18

## What is CVE-2026-68480?

In the Linux kernel, the following vulnerability has been resolved: x86/bugs: Make Safe-RET robust against interrupt injection An attacker injecting interrupts while the Safe-RET mitigation executes on machines affected by SRSO can neutralize the safe return sequence, potentially leading to data leakage through speculative execution. Fixup register state as if the Safe-RET sequence executed successfully by "emulating" it, in a manner of speaking, and avoid executing a RET instruction after returning from the interrupt.

1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 83 days ago.

## Severity and exploitation probability

- **EPSS (FIRST):** 0.2% probability of exploitation in the next 30 days, higher than 13.1% of all scored CVEs
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 0.5/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2026-08-06, last modified 2026-08-18

## Is CVE-2026-68480 being exploited?

It currently carries a trending score of 22 in the Threadlinqs vulnerability feed.

## Affected products and versions

- [Linux](https://intel.threadlinqs.com/vendors/linux): Linux

## How to fix CVE-2026-68480

No vendor patch reference has been recorded for CVE-2026-68480 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

## Threat activity tracking CVE-2026-68480

1 tracked threat in the Threadlinqs corpus references CVE-2026-68480, either in the campaign’s CVE list or as an indicator on the campaign record.

- [TONTOU: Interrupt-Injection Attack Bypasses Spectre v2 (eIBRS/Safe RET) Defenses on Intel and AMD CPUs](https://intel.threadlinqs.com/threat/TL-2026-1954) — HIGH · 2026-08-06

## Sources

Enriched from CVE.org, FIRST EPSS, GitHub Security Advisories. Last verified by Threadlinqs on 2026-10-10.

**Other references**

- [git.kernel.org](https://git.kernel.org/stable/c/dfefa3c51370f84acb643cddf98bb42c885d0483)
- [git.kernel.org (52db77a13be224e09eb4ba6b4252ae8ab9085c2c)](https://git.kernel.org/stable/c/52db77a13be224e09eb4ba6b4252ae8ab9085c2c)
- [git.kernel.org (d0208e08d64d99383e09852a76cc3038c5a4c3ab)](https://git.kernel.org/stable/c/d0208e08d64d99383e09852a76cc3038c5a4c3ab)
- [git.kernel.org (6703dba1d14cbd6647cd1ccfa3a3fa94b64dd096)](https://git.kernel.org/stable/c/6703dba1d14cbd6647cd1ccfa3a3fa94b64dd096)
- [git.kernel.org (e262f28a69ae9e0791248f93b0173c1d1f3e1d5d)](https://git.kernel.org/stable/c/e262f28a69ae9e0791248f93b0173c1d1f3e1d5d)

_Showing 5 of 9 recorded references._

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-68480
Full detection coverage and IOCs for threats exploiting CVE-2026-68480 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp