Description
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.
To remediate this issue, users should upgrade to aws-c-http version 0.11.0.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| AWS | aws-c-http | 0.4.22 – ≤ 0.10.15 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | mount-s3 | 1.23.0-1.amzn2023 | ALAS2023-2026-3233 |
| Amazon Linux 2023 | python3-awscrt | 0.36.4-1.amzn2023.0.2 | ALAS2023-2026-3280 |
Advisories 2
- ALAS2023-2026-3280 Important: python-awscrt security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Oct 28, 2026
- ALAS2023-2026-3233 Important: mount-s3 security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Oct 26, 2026