Skip to content
CVE PROGRAM SOURCE RECORDUnscored

CVE-2026-98433

KVM: PPC: Book3S HV: fix secure device page leak on uv_page_in() failure

Read JSON ↗CVE.org ↗
Status
Published
Published
Updated
Assigning organization
Linux

Description

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • ca9f4942670c37407bb109090eaf776ce2ccc54c to < ed2f2ff63cb7e71204096e765c6d02c3b6974b95affected
  • ca9f4942670c37407bb109090eaf776ce2ccc54c to < 8f3b7746874b39fc20e0363c9076c7787d4765baaffected
  • ca9f4942670c37407bb109090eaf776ce2ccc54c to < a933d7024359e2e566b07903d1294b84f90482aeaffected
  • ca9f4942670c37407bb109090eaf776ce2ccc54c to < c41088b2765af1e97e7bb05f906ae1823eca0388affected
  • ca9f4942670c37407bb109090eaf776ce2ccc54c to < f3d4b2fc30c97cf8e6f8b880d2de9c17ecac7f5baffected
  • ca9f4942670c37407bb109090eaf776ce2ccc54c to < dfb84274932737e338ff5eb27f34b4c8ecb01b50affected
  • ca9f4942670c37407bb109090eaf776ce2ccc54c to < fcbff8008b0e08cd53b611bd0ff7e01f5b962f80affected
  • ca9f4942670c37407bb109090eaf776ce2ccc54c to < 0a416ee20bcccddf91ca5b63696a23b9d11d73aaaffected

Linux Linux

Default version status: affected

  • 5.5affected
  • 0 to < 5.5unaffected
  • 5.10.271 to ≤ 5.10.*unaffected
  • 5.15.222 to ≤ 5.15.*unaffected
  • 6.1.189 to ≤ 6.1.*unaffected
  • 6.6.158 to ≤ 6.6.*unaffected
  • 6.12.112 to ≤ 6.12.*unaffected
  • 6.18.54 to ≤ 6.18.*unaffected
  • 7.2.8 to ≤ 7.2.*unaffected
  • 7.3 to ≤ *unaffected

References