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CVE-2022-1158 is a memory-safety vulnerability in the Linux kernel's KVM component. During guest page-table updates, cmpxchg_gpte improperly uses vm_pgoff as an offset to obtain a page frame number. Because user-mode processes control both vaddr and vm_pgoff, an unprivileged local host user can cause writes beyond the mapped userspace guest-memory region. These writes can trigger use-after-free conditions, potentially corrupt kernel memory, and cause denial of service. The defect was introduced upstream in Linux 5.2.
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A Linux kernel KVM vulnerability in which cmpxchg_gpte can write to page frame numbers outside the userspace region. Red Hat advisory RHSA-2022:8989, rated Important, provides kpatch-patch security updates for Red Hat Enterprise Linux 8.2 Update Services for SAP Solutions.
Linux kernel vulnerability addressed by this kernel-rt update; no issue description is provided in the content.
Unknown.
Linux kernel vulnerability addressed by RHSA-2022:7683; no flaw details are provided in this advisory text.
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Every observed campaign linking this CVE to a named adversary.
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YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.