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CVE-2022-1852 is a NULL pointer dereference in the Linux kernel KVM module's x86 instruction-emulation path. When an Intel-hosted guest executes an illegal instruction, KVM can enter undefined-instruction emulation with no permission-check callback, leaving the emulation context's check_perm callback NULL. Vulnerable breakpoint and decode-result handling can also permit instruction emulation to proceed with an incompletely decoded instruction and stale emulation context. The resulting NULL dereference in x86_emulate_insn can crash or disrupt the host kernel.
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What an attacker gets, and what they’ve been doing with it.
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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.
12 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.