An issue was discovered in yasm version 1.3.0. There is a NULL pointer dereference in yasm_expr_get_intnum() in libyasm/expr.c.

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2025-680614 advisory.

    An issue was discovered in yasm version 1.3.0. There is a NULL pointer dereference in     yasm_expr_get_intnum() in libyasm/expr.c.

Tenable has extracted the preceding description block directly from the Unity Linux security advisory.

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

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - An issue was discovered in yasm version 1.3.0. There is a NULL pointer dereference in     yasm_expr_get_intnum() in libyasm/expr.c. (CVE-2021-33454)

Note that Nessus relies on the presence of the package as reported by the vendor.

The version of yasm installed on the remote Azure Linux 3.0 host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the CVE-2021-33454 advisory.

  - An issue was discovered in yasm version 1.3.0. There is a NULL pointer dereference in     yasm_expr_get_intnum() in libyasm/expr.c. (CVE-2021-33454)

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

The version of yasm installed on the remote CBL Mariner 2.0 host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the CVE-2021-33454 advisory.

  - An issue was discovered in yasm version 1.3.0. There is a NULL pointer dereference in     yasm_expr_get_intnum() in libyasm/expr.c. (CVE-2021-33454)

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

The version of yasm installed on the remote host is prior to 1.2.0-1.5. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS-2023-1724 advisory.

    An issue was discovered in yasm version 1.3.0. There is a NULL pointer dereference in     yasm_expr_get_intnum() in libyasm/expr.c. (CVE-2021-33454)

    An issue was discovered in yasm version 1.3.0. There is a NULL pointer dereference in     nasm_parser_directive() in modules/parsers/nasm/nasm-parse.c. (CVE-2021-33459)

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.

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2023-157 advisory.

    An issue was discovered in yasm version 1.3.0. There is a NULL pointer dereference in     yasm_expr_get_intnum() in libyasm/expr.c. (CVE-2021-33454)

    An issue was discovered in yasm version 1.3.0. There is a NULL pointer dereference in     nasm_parser_directive() in modules/parsers/nasm/nasm-parse.c. (CVE-2021-33459)

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	Severity
267602	Unity Linux 20.1070e Security Update: yasm (UTSA-2025-680614)	Nessus	Unity Linux Local Security Checks	medium
256753	Linux Distros Unpatched Vulnerability : CVE-2021-33454	Nessus	Misc.	medium
215584	Azure Linux 3.0 Security Update: yasm (CVE-2021-33454)	Nessus	Azure Linux Local Security Checks	medium
202198	CBL Mariner 2.0 Security Update: yasm (CVE-2021-33454)	Nessus	MarinerOS Local Security Checks	medium
173934	Amazon Linux AMI : yasm (ALAS-2023-1724)	Nessus	Amazon Linux Local Security Checks	medium
173843	Amazon Linux 2023 : yasm, yasm-devel (ALAS2023-2023-157)	Nessus	Amazon Linux Local Security Checks	medium

Detections

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CVE-2021-33454

medium

Tenable Plugins

medium

medium

medium

medium

medium

medium