CVE-2026-98440KVM: arm64: nv: Delay freeing of shadow S2 structures until VM destruction
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Oct 19, 2026
- First seen by InfoSec Signals
- Oct 18, 2026
Affected products
Linux Linux linux:linux (from the name) | from 4f128f8e1aaac189f83d0f828bcdb2986d8d2e51 before 876049f026b4dfaca0cc78ec81be0e639ca8525d; from 4f128f8e1aaac189f83d0f828bcdb2986d8d2e51 before 22e82acec93a681071ed36f70eabe2d0c4e0bebd; from 4f128f8e1aaac189f83d0f828bcdb2986d8d2e51 before 5bf1c9175e657b3c2dc1cf77403031ac7aadcf66; from 4f128f8e1aaac189f83d0f828bcdb2986d8d2e51 before e5843f4effaa2ffac3e789ecd4456403564961d4 | CNA record |
References
- https://git.kernel.org/stable/c/876049f026b4dfaca0cc78ec81be0e639ca8525d
- https://git.kernel.org/stable/c/22e82acec93a681071ed36f70eabe2d0c4e0bebd
- https://git.kernel.org/stable/c/5bf1c9175e657b3c2dc1cf77403031ac7aadcf66
- https://git.kernel.org/stable/c/e5843f4effaa2ffac3e789ecd4456403564961d4
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.