CVE-2026-98433: Linux kernel · KVM: PPC: Book3S HV: fix secure device page leak on uv_page_in() failure
Affects Linux kernelSource CVE Database V5
Not known to be exploited · fixed in fcbff8008b0e08cd53b611bd0ff7e01f5b962f80 : update Linux kernel when convenient.
Data as of 26 Oct 2026, 17:16 UTC
Rated Medium by Threat Radar's AI analysis · CVSS not yet scored by NVD
- EPSS
- 0.1% chance of exploitation in 30 days – higher than 5% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in fcbff8008b0e08cd53b611bd0ff7e01f5b962f80, f3d4b2fc30c97cf8e6f8b880d2de9c17ecac7f5b, ed2f2ff63cb7e71204096e765c6d02c3b6974b95 +5
Exploitation evidence
Disclosed: evidence found.
CVE published 18 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
Upgrade to a fixed release listed under Affected software.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| LinuxLinux | Affected
| Fixed in
|
| LinuxLinux | Affected
| Fixed in
|
| LinuxLinux | Affected
| Fixed in
|
| LinuxLinux | Affected
| Fixed in
|
| LinuxLinux | Affected
| Fixed in
|
| LinuxLinux | Affected
| Fixed in
|
AI-suggested
A fix is available and has been applied in the Linux kernel. Users should update to a fixed kernel version that includes the patch to ensure proper cleanup of secure device pages on uv_page_in() failure. No additional mitigation steps are required beyond applying the official fix.
Description
A vulnerability in the Linux kernel's KVM PPC Book3S HV subsystem causes a secure device page leak when uv_page_in() fails during kvmppc_svm_page_in(). This leak permanently consumes an entry from the secure memory pool, leaks allocated structures, and marks the guest frame number as secure, rendering it unusable for the VM's lifetime. The issue occurs on POWER9/10 systems with Ultravisor/PEF and is fixed by applying proper resource cleanup on failure paths.
References
- git.kernel.org/stable/c/ed2f2ff63cb7e71204096e765c6d02c3b6974b95 (opens in a new tab)
- git.kernel.org/stable/c/8f3b7746874b39fc20e0363c9076c7787d4765ba (opens in a new tab)
- git.kernel.org/stable/c/a933d7024359e2e566b07903d1294b84f90482ae (opens in a new tab)
- git.kernel.org/stable/c/c41088b2765af1e97e7bb05f906ae1823eca0388 (opens in a new tab)
- git.kernel.org/stable/c/f3d4b2fc30c97cf8e6f8b880d2de9c17ecac7f5b (opens in a new tab)
- git.kernel.org/stable/c/dfb84274932737e338ff5eb27f34b4c8ecb01b50 (opens in a new tab)
- git.kernel.org/stable/c/fcbff8008b0e08cd53b611bd0ff7e01f5b962f80 (opens in a new tab)
- git.kernel.org/stable/c/0a416ee20bcccddf91ca5b63696a23b9d11d73aa (opens in a new tab)