Ubuntu Security NoticesUSN-8817-1

USN-8817-1: Linux kernel vulnerabilities

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 A local attacker could possibly use this to write to memory after permission to do so had been revoked, bypassing memory protections or escalating privileges. (CVE-2025-10263) Several security issues were discovered in the Linux kernel. An attacker could possibly use these to compromise the system. This update corrects flaws in the following subsystems: - ARM64 architecture; - InfiniBand drivers; - Network drivers; - TCM subsystem; - B.A.T.M.A.N. meshing protocol; - HSR network protocol; - IPv4 networking; - IPv6 networking; - Netfilter; - RDS protocol; (CVE-2026-53131, CVE-2026-53186, CVE-2026-53216, CVE-2026-53221, CVE-2026-53354, CVE-2026-53355, CVE-2026-63886, CVE-2026-63887, CVE-2026-63888, CVE-2026-63912, CVE-2026-63922, CVE-2026-63924, CVE-2026-63984, CVE-2026-63992, CVE-2026-63993, CVE-2026-63994, CVE-2026-64000, CVE-2026-64007, CVE-2026-64091)

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Scope

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Next step

What the vendor recommends

This update corrects flaws in the following subsystems: - ARM64 architecture; - InfiniBand drivers; - Network drivers; - TCM subsystem; - B.A.T.M.A.N.

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Timeline

When this advisory changed

Sep 24, 2026 at 3:01 PM UTC
Published by Ubuntu
The publication date reported by the vendor.
Sep 24, 2026 at 3:55 PM UTC
Added to SecurityAlert
We collected the advisory from the official source.
Sep 26, 2026 at 6:40 PM UTC
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Vendor: Ubuntu
Advisory ID: USN-8817-1
Last source check: Sep 26, 2026 at 6:40 PM UTC

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