Improper Access Control Affecting torvalds/linux package, versions [6.8,6.12.110)[6.13,6.18.51)[6.19,7.2.5)
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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- published11 Oct 2026
- disclosed16 Sept 2026
- creditUnknown
Introduced: 16 Sep 2026
CVE-2026-89908 (opens in a new tab)How to fix?
Upgrade torvalds/linux to version 6.12.110, 6.18.51, 7.2.5 or higher.
Overview
Affected versions of this package are vulnerable to Improper Access Control in the kvm_arch_prepare_memory_region process. An attacker can gain unauthorized access to host memory and potentially modify or corrupt host data by exploiting improper handling of memory region flags during KVM memory slot updates, leading to incorrect mapping of guest physical addresses to host physical pages.
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