CVE-2026-98433KVM: PPC: Book3S HV: fix secure device page leak on uv_page_in() failure
- —Not scoredno CVSS score yet
- 0.17%Exploitation in 30 daysEPSS · top 94% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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.
Timeline
ID reserved
By Linux
- 23 days later
· 23 days later
Published
- 1 day later
· 1 day later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
No CVSS score yet: neither the CNA, CISA nor NVD has scored this CVE. NVD status: Received.
- EPSS (exploitation in 30 days)
- 0.17% · top 94% of all CVEs (12 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Not scored.
Affected products
- affected ca9f4942670c37407bb109090eaf776ce2ccc54c – < ed2f2ff63cb7e71204096e765c6d02c3b6974b95
- affected ca9f4942670c37407bb109090eaf776ce2ccc54c – < 8f3b7746874b39fc20e0363c9076c7787d4765ba
- affected ca9f4942670c37407bb109090eaf776ce2ccc54c – < a933d7024359e2e566b07903d1294b84f90482ae
- affected ca9f4942670c37407bb109090eaf776ce2ccc54c – < c41088b2765af1e97e7bb05f906ae1823eca0388
- affected ca9f4942670c37407bb109090eaf776ce2ccc54c – < f3d4b2fc30c97cf8e6f8b880d2de9c17ecac7f5b
- affected ca9f4942670c37407bb109090eaf776ce2ccc54c – < dfb84274932737e338ff5eb27f34b4c8ecb01b50
- affected ca9f4942670c37407bb109090eaf776ce2ccc54c – < fcbff8008b0e08cd53b611bd0ff7e01f5b962f80
- affected ca9f4942670c37407bb109090eaf776ce2ccc54c – < 0a416ee20bcccddf91ca5b63696a23b9d11d73aa
- affected 5.5
- unaffected < 5.5
- unaffected 5.10.271 – ≤ 5.10.*
- unaffected 5.15.222 – ≤ 5.15.*
- unaffected 6.1.189 – ≤ 6.1.*
- unaffected 6.6.158 – ≤ 6.6.*
- unaffected 6.12.112 – ≤ 6.12.*
- unaffected 6.18.54 – ≤ 6.18.*
- unaffected 7.2.8 – ≤ 7.2.*
- unaffected 7.3 – ≤ *
References
References8
- https://git.kernel.org/stable/c/ed2f2ff63cb7e71204096e765c6d02c3b6974b95 (opens in a new tab)
- https://git.kernel.org/stable/c/8f3b7746874b39fc20e0363c9076c7787d4765ba (opens in a new tab)
- https://git.kernel.org/stable/c/a933d7024359e2e566b07903d1294b84f90482ae (opens in a new tab)
- https://git.kernel.org/stable/c/c41088b2765af1e97e7bb05f906ae1823eca0388 (opens in a new tab)
- https://git.kernel.org/stable/c/f3d4b2fc30c97cf8e6f8b880d2de9c17ecac7f5b (opens in a new tab)
- https://git.kernel.org/stable/c/dfb84274932737e338ff5eb27f34b4c8ecb01b50 (opens in a new tab)
- https://git.kernel.org/stable/c/fcbff8008b0e08cd53b611bd0ff7e01f5b962f80 (opens in a new tab)
- https://git.kernel.org/stable/c/0a416ee20bcccddf91ca5b63696a23b9d11d73aa (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-103671 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
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[](https://cveledger.app/cve/CVE-2026-98433)Record last updated .