Protection Mechanism Failure Affecting torvalds/linux package, versions [6.14,6.18.57)[6.19,7.2.11)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published24 Oct 2026
- disclosed23 Oct 2026
- creditUnknown
Introduced: 23 Oct 2026
NewCVE-2026-99017 (opens in a new tab)How to fix?
Upgrade torvalds/linux to version 6.18.57, 7.2.11 or higher.
Overview
Affected versions of this package are vulnerable to Protection Mechanism Failure in the initialization process for RISC-V architectures with T-Head C9xx CPUs due to improper detection of CPU vulnerability state during early boot. An attacker can bypass intended mitigations by leveraging a system where the early alternatives are not executed, resulting in the continued exposure of vulnerable CPU features.
Note: The Linux kernel project assigns a CVE to every bug fix it ships, whether or not the bug has been shown to be exploitable. This advisory was generated from that process and has not been individually assessed for exploitability. See the kernel's CVE process documentation: https://github.com/torvalds/linux/blob/master/Documentation/process/cve.rst