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CVE-2025-10263 is a hardware vulnerability affecting multiple Arm CPU families, including Arm C1, Neoverse, and Cortex cores, in which completion of a broadcast Translation Lookaside Buffer Invalidate followed by a Data Synchronization Barrier is not guaranteed to imply global observation of prior writes translated by the invalidated TLB entry. Under complex microarchitectural conditions, a store on one processing element can remain not globally observed even after another processing element completes the TLBI and barrier sequence. This can permit stale or revoked translation state to remain effectively usable for writes, allowing writes to resources owned by a higher exception level and bypassing intended stage 1, stage 2, or GPT-based protection boundaries. In virtualization contexts, this creates a path for a guest to continue writing to memory after permissions have been revoked by the hypervisor.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
Patch, then assume compromise.
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.
55 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A Xen vulnerability tracked as XSA-493 and addressed in Alpine Linux 3.22.5 and 3.23.5.
A Linux kernel race condition in TLBI operations that can allow privilege gain.
A critical AMD hardware/firmware translation-related flaw involving TLB invalidation behavior that could allow bypass of translation protections and execution of untrusted code on the host.
A privilege escalation vulnerability impacting Windows Kernel.
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.