KVM: arm64: nv: Delay freeing of shadow S2 structures until VM destruction
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.
CVE-2026-98440
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-98440
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "4f128f8e1aaac189f83d0f828bcdb2986d8d2e51",
"lessThan": "876049f026b4dfaca0cc78ec81be0e639ca8525d",
"versionType": "git"
},
{
"status": "affected",
"version": "4f128f8e1aaac189f83d0f828bcdb2986d8d2e51",
"lessThan": "22e82acec93a681071ed36f70eabe2d0c4e0bebd",
"versionType": "git"
},
{
"status": "affected",
"version": "4f128f8e1aaac189f83d0f828bcdb2986d8d2e51",
"lessThan": "5bf1c9175e657b3c2dc1cf77403031ac7aadcf66",
"versionType": "git"
},
{
"status": "affected",
"version": "4f128f8e1aaac189f83d0f828bcdb2986d8d2e51",
"lessThan": "e5843f4effaa2ffac3e789ecd4456403564961d4",
"versionType": "git"
}
],
"programFiles": [
"arch/arm64/include/asm/kvm_nested.h",
"arch/arm64/kvm/arm.c",
"arch/arm64/kvm/nested.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.11"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.11",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.12.113",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.56",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.9",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"arch/arm64/include/asm/kvm_nested.h",
"arch/arm64/kvm/arm.c",
"arch/arm64/kvm/nested.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-98440
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #55592 · Revision 1
- Added to Heist Feed
- Publisher date