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CVE-2022-1852 is a NULL pointer dereference in the Linux kernel KVM x86 instruction-emulation path, affecting x86_emulate_insn in arch/x86/kvm/emulate.c. When an Intel-hosted guest executes an illegal instruction, KVM can process the resulting undefined-instruction exception through emulation. A breakpoint-related return value of zero may be incorrectly treated as EMULATION_OK, allowing x86_emulate_instruction() to proceed before the instruction has been successfully decoded and with stale emulation context. In this path, the permission-check callback can be absent, leaving ctxt->check_perm NULL and causing a kernel fault.
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No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
8 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A Linux kernel NULL-pointer dereference in x86_emulate_insn that may cause denial of service.
Linux kernel x86 instruction-emulation NULL-pointer dereference that may cause denial of service.
Linux kernel x86 instruction-emulation NULL-pointer dereference denial-of-service vulnerability.
Linux kernel x86 instruction-emulation NULL-pointer dereference that may cause denial of service.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
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.