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AWS linux medium security documentation change

Service: linux · 2025-11-19 · Security-related medium

File: linux/al2023/release-notes/relnotes-2023.9.20251105.md

Summary

Added known issue about runc tmpfs permissions affecting container launches

Security assessment

Documents a security-related runtime issue (incorrect tmpfs permissions in runc) that could impact container security boundaries, with reference to a fixed version. This directly addresses a security vulnerability in container isolation.

Diff

diff --git a/linux/al2023/release-notes/relnotes-2023.9.20251105.md b/linux/al2023/release-notes/relnotes-2023.9.20251105.md
index 2da8e21d8..57b3bc832 100644
--- a//linux/al2023/release-notes/relnotes-2023.9.20251105.md
+++ b//linux/al2023/release-notes/relnotes-2023.9.20251105.md
@@ -48,0 +49,7 @@ This release represents an update to the 9th quarterly release of AL2023. AL2023
+###### Known Issues
+
+  * A change introduced in `runc-1.3.2-2.amzn2023.0.1` that changed the default tmpfs directory permissions may cause issues when launching containers. This issue has been addressed in `runc-1.3.3-2.amzn2023.0.1` released in AL2023 version `2023.9.20251110`.
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