Summary
Package updates are available for Amazon Linux 2023 that fix the following vulnerabilities: CVE-2026-22703: Cosign provides code signing and transparency for containers and binaries. Prior to versions 2.6.2 and 3.0.4, Cosign bundle can be crafted to successfully verify an artifact even if the embedded Rekor entry does not reference the artifact's digest, signature or public key. When verifying a Rekor entry, Cosign verifies the Rekor entry signature, and also compares the artifact's digest, the user's public key from either a Fulcio certificate or provided by the user, and the artifact signature to the Rekor entry contents. Without these comparisons, Cosign would accept any response from Rekor as valid. A malicious actor that has compromised a user's identity or signing key could construct a valid Cosign bundle by including any arbitrary Rekor entry, thus preventing the user from being able to audit the signing event. This issue has been patched in versions 2.6.2 and 3.0.4. CVE-2025-68121: crypto/tls: Config.Clone copies automatically generated session ticket keys, session resumption does not account for the expiration of full certificate chain CVE-2025-61730: crypto/tls: handshake messages may be processed at the incorrect encryption level CVE-2025-61728: archive/zip: denial of service when parsing arbitrary ZIP archives CVE-2025-61726: net/http: memory exhaustion in Request.ParseForm CVE-2025-47913: SSH clients receiving SSH_AGENT_SUCCESS when expecting a typed response will panic and cause early termination of the client process.
Fixed packages 1
| Release | Package | Fixed in |
|---|---|---|
| Amazon Linux · 2023 | runfinch-finch | 0:1.14.1-1.amzn2023.0.1 |
Vulnerabilities 6
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Critical 9.1
Unexpected session resumption in crypto/tls
During session resumption in crypto/tls, if the underlying Config has its ClientCAs or RootCAs fields mutated between the initial handshake and the resumed handshake, the resumed handshake may succeed when it should have failed. This may happen when a user ca…
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High 7.5
Potential denial of service in golang.org/x/crypto/ssh/agent
SSH clients receiving SSH_AGENT_SUCCESS when expecting a typed response will panic and cause early termination of the client process.
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High 7.5
Memory exhaustion in query parameter parsing in net/url
The net/url package does not set a limit on the number of query parameters in a query. While the maximum size of query parameters in URLs is generally limited by the maximum request header size, the net/http.Request.ParseForm method can parse large URL-encode…
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Medium 6.5
Excessive CPU consumption when building archive index in archive/zip
archive/zip uses a super-linear file name indexing algorithm that is invoked the first time a file in an archive is opened. This can lead to a denial of service when consuming a maliciously constructed ZIP archive.
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Medium 5.5
Cosign verification accepts any valid Rekor entry under certain conditions
Cosign provides code signing and transparency for containers and binaries. Prior to versions 2.6.2 and 3.0.4, Cosign bundle can be crafted to successfully verify an artifact even if the embedded Rekor entry does not reference the artifact's digest, signature …
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Medium 5.3
Handshake messages may be processed at the incorrect encryption level in crypto/tls
During the TLS 1.3 handshake if multiple messages are sent in records that span encryption level boundaries (for instance the Client Hello and Encrypted Extensions messages), the subsequent messages may be processed before the encryption level changes. This c…
References
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web
https://alas.aws.amazon.com/cve/html/CVE-2025-47913.html
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web
https://alas.aws.amazon.com/cve/html/CVE-2025-61726.html
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web
https://alas.aws.amazon.com/cve/html/CVE-2025-61728.html
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web
https://alas.aws.amazon.com/cve/html/CVE-2025-61730.html
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web
https://alas.aws.amazon.com/cve/html/CVE-2025-68121.html
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web
https://alas.aws.amazon.com/cve/html/CVE-2026-22703.html