CVE-2026-98440
In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: nv: Delay freeing of shadow S2 structures until VM destruction We free the shadow S2 structures from kvm_arch_flush_shadow_all(), which is a Bad Idea(tm). Freeing the page tables is fair game (this is what this callback is for), but freeing the container that could still be referenced by another part of the system is not great. Instead, grow separate destructors that gets called when we tear the VM down for good. From there, we can nuke both the individual MMUs as well as the global array that points to them, safe in the knowledge that the vcpus themselves have been destroyed already.
Affected versions
Linux kernel versions
6.11
and later are affected. Fixed in
6.12.113,
6.18.56,
7.2.9,
7.3
and their respective stable series.
References
4 totalFrequently asked questions
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What is CVE-2026-98440?
CVE-2026-98440 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 6.11 onward and has been patched in 6.12.113, 6.18.56, 7.2.9 and others. CVE-2026-98440 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
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Is there a patch available for CVE-2026-98440?
Yes. CVE-2026-98440 has been patched. Fixed versions include 6.12.113, 6.18.56, 7.2.9 and others. If you are running Linux kernel 6.11 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2026-98440 actively exploited?
No. CVE-2026-98440 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.