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 shad…
Impact
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 packages
This record carries no package version data, so it cannot be matched against a dependency list automatically. Read the advisory and compare your version by hand.
References
- NVD record
- CVE.org record
- https://git.kernel.org/stable/c/22e82acec93a681071ed36f70eabe2d0c4e0bebd
- https://git.kernel.org/stable/c/5bf1c9175e657b3c2dc1cf77403031ac7aadcf66
- https://git.kernel.org/stable/c/876049f026b4dfaca0cc78ec81be0e639ca8525d
- https://git.kernel.org/stable/c/e5843f4effaa2ffac3e789ecd4456403564961d4