USN-8728-2: Linux kernel (Azure) vulnerabilities
Ubuntu patches Azure Linux kernel flaws, including local privilege-escalation issues on Arm and AMD Zen 2.
Ubuntu published USN-8728-2 for Linux kernel packages used on Azure. CVE-2025-10263 involves Arm processors completing a broadcast TLB invalidation before related memory writes are globally observed, which a local attacker might use to write memory after permissions were revoked. CVE-2025-54518 concerns incomplete isolation of shared resources in the operation cache on some AMD Zen 2 processors, potentially allowing local privilege escalation. The notice also refers to additional kernel issues without naming them in the provided text.
- USN-8728-2 patches the Azure Linux kernel.
- CVE-2025-10263: Arm TLB invalidation race may allow local memory writes after revocation.
- CVE-2025-54518: AMD Zen 2 operation-cache isolation flaw may enable local privilege escalation.
- No exploitation in the wild is stated.
- Products
- Linux kernelAzure
Vulnerabilities mentioned
All| CVE | Vulnerability | CVSS | EPSS | Signals | Published |
|---|---|---|---|---|---|
| CVE-2025-10263 | Arm C1-Ultra, C1-Premium, Neoverse V3 & V3AE, Neoverse V2, Neoverse V1, Neoverse-N2, Neoverse-N1, Cortex-X925, Cortex-X4, Cortex-X3, Cortex-X2, Cortex-X1 &… | 9.1 | <1% | ||
| CVE-2025-54518 | Improper isolation of shared resources within the CPU operation cache on Zen 2-based products could allow an attacker to corrupt instructions executed at a… | 7.3 | <1% |
From the original article
It was discovered that some Arm processors could complete a broadcast translation lookaside buffer (TLB) invalidation before memory writes made through the invalidated translation were globally observed. A local attacker could possibly use this to write to memory after permission to do so had been revoked, bypassing memory protections or escalating privileges.
ubuntu.com
A short excerpt; the article and its images belong to the publisher. Summary, key facts and assessment above are AI-written from the article and can be wrong.