Summary
Package updates are available for Amazon Linux 2023 that fix the following vulnerabilities: CVE-2026-103963: A flaw was found in glib-networking. When establishing connections using Transport Layer Security (TLS) version 1.3, the client-side session cache does not limit the number of session tickets retained for a single host. A malicious server can exploit this by sending excessive session ticket messages, causing the client application to continuously consume memory. This unbounded memory growth can exhaust system memory, resulting in a Denial of Service (DoS).
Fixed packages 5
| Release | Package | Fixed in |
|---|---|---|
| Amazon Linux · 2023 | glib-networking | 0:2.80.0-187.amzn2023.0.2 |
| Amazon Linux · 2023 | glib-networking-debuginfo | 0:2.80.0-187.amzn2023.0.2 |
| Amazon Linux · 2023 | glib-networking-debugsource | 0:2.80.0-187.amzn2023.0.2 |
| Amazon Linux · 2023 | glib-networking-tests | 0:2.80.0-187.amzn2023.0.2 |
| Amazon Linux · 2023 | glib-networking-tests-debuginfo | 0:2.80.0-187.amzn2023.0.2 |
Vulnerabilities 1
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High 7.5
Glib-networking: unbounded tls 1.3 session ticket queue growth in glib-networking allows remote denial of service
A flaw was found in glib-networking. When establishing connections using Transport Layer Security (TLS) version 1.3, the client-side session cache does not limit the number of session tickets retained for a single host. A malicious server can exploit this by …
References
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web
https://alas.aws.amazon.com/cve/html/CVE-2026-103963.html