mount-s3: Improper handling of HPACK dynamic table size updates in the AWS Common Runtime aws-c-http library might allow a remo...
CVE-2026-12043 is fixed in 6 products on 1 platform, first by ALAS2023-2026-3233, released November 7, 2026. It is not reported as exploited. Patch Radar priority: High.
Improper handling of HPACK dynamic table size updates in the AWS Common Runtime aws-c-http library might allow a remote threat actor operating a server to cause memory corruption on a connecting client application, potentially leading to arbitrary code execution, via a crafted sequence of HTTP/2 HEADERS frames.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| mount-s3 · amzn 2023 | 1.23.0-1.amzn2023 | ALAS2023-2026-3233 | Nov 7, 2026 |
| mount-s3-debuginfo · amzn 2023 | 1.23.0-1.amzn2023 | ALAS2023-2026-3233 | Nov 7, 2026 |
| mount-s3-debugsource · amzn 2023 | 1.23.0-1.amzn2023 | ALAS2023-2026-3233 | Nov 7, 2026 |
| python-awscrt-debugsource · amzn 2023 | 0.36.4-1.amzn2023.0.2 | ALAS2023-2026-3280 | Nov 7, 2026 |
| python3-awscrt · amzn 2023 | 0.36.4-1.amzn2023.0.2 | ALAS2023-2026-3280 | Nov 7, 2026 |
| python3-awscrt-debuginfo · amzn 2023 | 0.36.4-1.amzn2023.0.2 | ALAS2023-2026-3280 | Nov 7, 2026 |
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