Arm CPU TLBI completion permission bypass privilege escalation
CVE-2025-10263 is a critical Arm CPU erratum affecting multiple Arm cores, including C1-Ultra, C1-Premium, Neoverse V3/V3AE/V2/V1/N2/N1, Cortex-X925/X4/X3/X2/X1/X1C, and Cortex-A710/A78/A78AE/A78C/A77/A76/A76AE. The flaw arises from a timing/ordering condition during memory permission changes: completion of certain memory accesses is not guaranteed by completion of a TLBI, so a broadcast TLBI and subsequent DSB may complete before an overlapping store from another processing element is globally observed. As a result, software may still complete a write to a location that has just been changed from writable to non-writable. This can bypass Stage 1 translation, Stage 2 translation, or GPT protection and may permit writes into memory owned by a higher exception level.
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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
13 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
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.