CVE-2026-98164High· 7.1▾ TwilightIn the Linux kernel, the following vulnerability has been resolved: KVM: x86/mmu: Check write tracking in all address spaces kvm_gfn_is_write_tracked() checks only the supplied memslot, but page tracking is per-address-space and shadow…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 39.1 · likelihood 0 · exploitation 0
Need a working PoC? Pro members can cast a request and our team develops one — it lands right here.
Exploit-prediction probability, daily snapshots since Sep 30.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
0.2%
— → 5.5
none → medium
Last analysed / modified upstream
5.5 → 7.1
medium → high
In the Linux kernel, the following vulnerability has been resolved:
KVM: x86/mmu: Check write tracking in all address spaces
kvm_gfn_is_write_tracked() checks only the supplied memslot, but page tracking is per-address-space and shadow pages are shared across all address spaces. With SMM, a GFN can therefore be write-tracked in one address space and appear untracked through the other.
Check the supplied slot first, then the slot for the other address space. This ensures all callers honor write tracking regardless of the active address space. In particular, it prevents mmu_try_to_unsync_pages() from marking an upper-level shadow page unsync and eventually triggering the BUG in pte_list_remove().
[invert direction of the conditional. - Paolo]
linux_kernel >= 4.2, < 6.1.187linux_kernel >= 6.2, < 6.6.156linux_kernel >= 6.7, < 6.12.108linux_kernel >= 6.13, < 6.18.49linux_kernel >= 6.19, < 7.1.13linux_kernel = 7.2Upgrade past the affected range:
linux_kernel 7.1.13Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
CVE-2020-36558Medium· 5.1A race condition in the Linux kernel before 5.5.7 involving VT_RESIZEX could lead to a NULL pointer dereference and general protection fault.
CVE-2022-0500High· 7.8A flaw was found in unrestricted eBPF usage by the BPF_BTF_LOAD, leading to a possible out-of-bounds memory write in the Linux kernel’s BPF subsystem due to the way a user loads BTF
CVE-2021-38198Medium· 5.5arch/x86/kvm/mmu/paging_tmpl.h in the Linux kernel before 5.12.11 incorrectly computes the access permissions of a shadow page, leading to a missing guest protection page fault.
CVE-2020-36311Medium· 5.5An issue was discovered in the Linux kernel before 5.9
CVE-2020-14390Medium· 5.6A flaw was found in the Linux kernel in versions before 5.9-rc6
CVE-2020-10781Medium· 5.5A flaw was found in the Linux Kernel before 5.8-rc6 in the ZRAM kernel module, where a user with a local account and the ability to read the /sys/class/zram-control/hot_add file can create ZRAM device nodes in the /dev/ directory