Out-of-bounds Read Affecting torvalds/linux package, versions [6.7,6.12.53)[6.13,6.17.3)
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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Test your applications- Snyk IDSNYK-UNMANAGED-TORVALDSLINUX-20700770
- published10 Oct 2026
- disclosed12 Nov 2025
- creditUnknown
Introduced: 12 Nov 2025
CVE-2025-40155 (opens in a new tab)How to fix?
Upgrade torvalds/linux to version 6.12.53, 6.17.3 or higher.
Overview
Affected versions of this package are vulnerable to Out-of-bounds Read in the pgtable_walk_level function. An attacker can cause disclosure of arbitrary kernel physical memory and trigger a denial of service by reading from a debugfs file associated with Intel IOMMU domain translation structures when the system is in legacy mode and certain page table conditions are met. This can result in leaking sensitive kernel data to userspace and potentially crashing the system due to a general protection fault, especially if the kernel is configured with CONFIG_INTEL_IOMMU_DEBUGFS and debugfs is mounted and accessible.
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