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THREAT OPS › Threat News › [NVD] CVE-2026-68166 — In the Linux kernel, the following vulnerability has been resolved: userfaultfd: prevent registration of special VMAs Vova Tokarev says: userfaultfd allows registration on shadow stack VMAs. With userfaultfd access, you can register on the shadow stack, discard a page ...

[NVD] CVE-2026-68166 — In the Linux kernel, the following vulnerability has been resolved: userfaultfd: prevent registration of special VMAs Vova Tokarev says: userfaultfd allows registration on shadow stack VMAs. With userfaultfd access, you can register on the shadow stack, discard a page ...

mednvdPublished 2026-08-10

CVE-2026-68166 CVSS: None Published: 2026-08-10T13:20:03.110

In the Linux kernel, the following vulnerability has been resolved:

userfaultfd: prevent registration of special VMAs

Vova Tokarev says:

userfaultfd allows registration on shadow stack VMAs. With userfaultfd access, you can register on the shadow stack, discard a page ... and inject a page with chosen return addresses via UFF

Indicators of compromise

CVE-2026-68166cve

Original source: https://nvd.nist.gov/vuln/detail/CVE-2026-68166