KVM: PPC: Book3S HV: fix secure device page leak on uv_page_in() failure
In the Linux kernel, the following vulnerability has been resolved: KVM: PPC: Book3S HV: fix secure device page leak on uv_page_in() failure In kvmppc_svm_page_in(), if uv_page_in() fails after kvmppc_uvmem_get_page() has succeeded, the secure device page is never released. kvmppc_uvmem_get_page() sets a bit in kvmppc_uvmem_bitmap, allocates a kvmppc_uvmem_page_pvt struct, marks the GFN as KVMPPC_GFN_UVMEM_PFN, and calls zone_device_page_init() which sets refcount=1 and locks the page. The subsequent goto out_finalize skips the *mig.dst assignment, so migrate_vma_finalize() is a no-op for the page, and none of those resources are ever reclaimed. Each occurrence permanently consumes one entry from the firmware-bounded secure memory pool (kvmppc_uvmem_bitmap), leaks pvt, and leaves the GFN marked as secure — making it unusable for the lifetime of the VM. The twin __kvmppc_svm_page_out() already handles the analogous uv_page_out() failure correctly with unlock_page(dpage); __free_page(dpage). Apply the same pattern here: unlock_page() followed by put_page(), which chains through free_zone_device_folio() into kvmppc_uvmem_folio_free() to clear the bitmap bit, free pvt, and reset the GFN state. Reachable whenever uv_page_in() returns an error (e.g. UV pool exhaustion) on any POWER9/10 + Ultravisor/PEF system.
CVE-2026-98433
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-2026-98433
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": "ca9f4942670c37407bb109090eaf776ce2ccc54c",
"lessThan": "ed2f2ff63cb7e71204096e765c6d02c3b6974b95",
"versionType": "git"
},
{
"status": "affected",
"version": "ca9f4942670c37407bb109090eaf776ce2ccc54c",
"lessThan": "8f3b7746874b39fc20e0363c9076c7787d4765ba",
"versionType": "git"
},
{
"status": "affected",
"version": "ca9f4942670c37407bb109090eaf776ce2ccc54c",
"lessThan": "a933d7024359e2e566b07903d1294b84f90482ae",
"versionType": "git"
},
{
"status": "affected",
"version": "ca9f4942670c37407bb109090eaf776ce2ccc54c",
"lessThan": "c41088b2765af1e97e7bb05f906ae1823eca0388",
"versionType": "git"
},
{
"status": "affected",
"version": "ca9f4942670c37407bb109090eaf776ce2ccc54c",
"lessThan": "f3d4b2fc30c97cf8e6f8b880d2de9c17ecac7f5b",
"versionType": "git"
},
{
"status": "affected",
"version": "ca9f4942670c37407bb109090eaf776ce2ccc54c",
"lessThan": "dfb84274932737e338ff5eb27f34b4c8ecb01b50",
"versionType": "git"
},
{
"status": "affected",
"version": "ca9f4942670c37407bb109090eaf776ce2ccc54c",
"lessThan": "fcbff8008b0e08cd53b611bd0ff7e01f5b962f80",
"versionType": "git"
},
{
"status": "affected",
"version": "ca9f4942670c37407bb109090eaf776ce2ccc54c",
"lessThan": "0a416ee20bcccddf91ca5b63696a23b9d11d73aa",
"versionType": "git"
}
],
"programFiles": [
"arch/powerpc/kvm/book3s_hv_uvmem.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.5"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.5",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.271",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.222",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.189",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.158",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.112",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.54",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.8",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"arch/powerpc/kvm/book3s_hv_uvmem.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-98433
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #38496 · Revision 1
- Added to Heist Feed
- Publisher date