Smithy-RS is a Rust code generation and runtime framework that generates HTTP clients and servers from Smithy interface definitions, powering the AWS SDK for Rust and custom service implementations. Uncontrolled recursion in the JSON, CBOR, and XML deserializer functions emitted by Amazon smithy-rs code generation could allow remote attackers to cause a denial of service (process abort via stack exhaustion) via a small request containing deeply nested data for a recursive model shape to a generated SDK or server. To mitigate this issue, users should upgrade to aws-sdk-rust release-2026-06-02 or later. Users building custom servers with smithy-rs codegen should regenerate from smithy-rs release-2026-06-01 or later.

The version of amazon-efs-utils installed on the remote host is prior to 3.1.3-1. It is, therefore, affected by a vulnerability as referenced in the ALAS2-2026-4044 advisory.

    Smithy-RS is a Rust code generation and runtime framework that generates HTTP clients and servers from     Smithy interface definitions, powering the AWS SDK for Rust and custom service implementations.



    Uncontrolled recursion in the JSON, CBOR, and XML deserializer functions emitted by Amazon smithy-rs code     generation could allow remote attackers to cause a denial of service (process abort via stack exhaustion)     via a small request containing deeply nested data for a recursive model shape to a generated SDK or     server.



    To mitigate this issue, users should upgrade to aws-sdk-rust release-2026-06-02 or later. Users building     custom servers with smithy-rs codegen should regenerate from smithy-rs release-2026-06-01 or later.
    (CVE-2026-15957)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

It is, therefore, affected by a vulnerability as referenced in the ALAS2023-2026-3333 advisory.

    Smithy-RS is a Rust code generation and runtime framework that generates HTTP clients and servers from     Smithy interface definitions, powering the AWS SDK for Rust and custom service implementations.



    Uncontrolled recursion in the JSON, CBOR, and XML deserializer functions emitted by Amazon smithy-rs code     generation could allow remote attackers to cause a denial of service (process abort via stack exhaustion)     via a small request containing deeply nested data for a recursive model shape to a generated SDK or     server.



    To mitigate this issue, users should upgrade to aws-sdk-rust release-2026-06-02 or later. Users building     custom servers with smithy-rs codegen should regenerate from smithy-rs release-2026-06-01 or later.
    (CVE-2026-15957)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2026-3116 advisory.

    Smithy-RS is a Rust code generation and runtime framework that generates HTTP clients and servers from     Smithy interface definitions, powering the AWS SDK for Rust and custom service implementations.



    Uncontrolled recursion in the JSON, CBOR, and XML deserializer functions emitted by Amazon smithy-rs code     generation could allow remote attackers to cause a denial of service (process abort via stack exhaustion)     via a small request containing deeply nested data for a recursive model shape to a generated SDK or     server.



    To mitigate this issue, users should upgrade to aws-sdk-rust release-2026-06-02 or later. Users building     custom servers with smithy-rs codegen should regenerate from smithy-rs release-2026-06-01 or later.
    (CVE-2026-15957)

    libgit2 version 1.9.4 and below is vulnerable to a heap out-of-bounds read in set_data() in     src/libgit2/transports/smart_pkt.c.

    The vulnerable code uses a fixed-size strncmp (smart_pkt.c:239) against the unvalidated capability buffer     of a smart-protocol pkt-line. When the bytes following the pkt-line in the contiguous receive buffer     happen to continue with ct-format=, the comparison spuriously matches, advancing format_str past the     pkt-line boundary. The following memchr(format_str, ' ', len - (format_str - line)) (smart_pkt.c:246) then     underflows its size_t size argument to ~SIZE_MAX and walks the heap looking for a space byte. An     unauthenticated remote attacker who controls (or man-in-the-middles) a Git server reached over     HTTP/HTTPS/SSH/git:// can trigger this on the FIRST ref-pkt of the refs advertisement, before any     capability negotiation has taken place. The OOB walk causes a process crash (SIGSEGV) when memchr enters     an unmapped page, and -- on heap layouts where memchr finds a stray space byte before crashing -- can     additionally drive the git_error_set(...'%.*s', format_len, format_str) formatter to copy a large window     of heap memory into the error string. (CVE-2026-53587)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Type	Severity
373428	Amazon Linux 2 : amazon-efs-utils (ALAS-2026-4044)	Nessus	Amazon Linux Local Security Checks	Local	high
371876	Amazon Linux 2023 : amazon-efs-utils (ALAS2023-2026-3333)	Nessus	Amazon Linux Local Security Checks	Local	high
351074	Amazon Linux 2023 : network-flow-monitor-agent (ALAS2023-2026-3116)	Nessus	Amazon Linux Local Security Checks	Local	high

Detections

Analytics

CVE-2026-15957

high

Tenable Plugins

high

high

high