ITScape: Guest-to-host escape in KVM/arm64 vGIC-ITS
CVE-2026-46316, dubbed ITScape, is a Linux kernel vulnerability in KVM on arm64 affecting the in-kernel vGIC-ITS emulation, specifically vgic_its_invalidate_cache(). The bug is caused by a race during concurrent invalidation of the per-ITS translation cache. The function iterates cache entries with xa_for_each() and drops references with vgic_put_irq(), but historically put the iterated pointer rather than the value actually returned by xa_erase(). Because xa_erase() is atomic and multiple invalidation paths can run concurrently, the same cache-held reference could be dropped more than once. This creates a double-put condition that can free an IRQ-related entry while it is still mapped by an ITE, resulting in a use-after-free and memory corruption in host kernel context. Public reporting states the flaw can be triggered entirely from guest-side actions in KVM/arm64 and has been demonstrated as a guest-to-host escape yielding host kernel code execution.
Are you exposed to this one?
Mallory correlates every CVE against your assets, your vendors, and active adversary campaigns. Know which vulnerabilities matter for you, not just which ones are loud.
Impact, mitigation & remediation
What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
Impact
What an attacker gets, and what they’ve been doing with it.
Mitigation
If you can’t patch tonight, do this now.
Remediation
Patch, then assume compromise.
Exploits
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Affected products & vendors
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.
Recent activity
11 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A critical Linux kernel KVM arm64 guest-to-host escape vulnerability caused by a race condition in vGIC-ITS emulation, enabling host kernel memory corruption and arbitrary code execution from a guest VM.
A critical KVM/arm64 guest-to-host escape vulnerability in the in-kernel KVM VGIC-ITS emulation that can allow a guest VM to execute commands on the host with kernel/root privileges.
The version that knows your environment.
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.