Use After Free vulnerability has been found in "io.c" program file of gawk (do_getline_redir() routine). This issue may lead to a crash. It affects gawk in versions 5.4.0 and below.

The remote CentOS Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the gawk-5.1.0-7.el9 build changelog.

  - Integer overflow vulnerability has been found in builtin.c program file of gawk. This issue may lead to     memory exhaustion on the hosting operating system and could be used to overwrite gawk heap metadata and     objects with attacker-controlled bytes. It affects gawk in versions 5.4.0 and below. (CVE-2026-40468)

  - Use After Free vulnerability has been found in io.c program file of gawk (do_getline_redir() routine).
    This issue may lead to a crash. It affects gawk in versions 5.4.0 and below. (CVE-2026-40467)

  - Buffer overflow vulnerability has been found in extension/readdir.c program file of gawk (ftype()     routine). This issue could be used to crash the program and potentially to achieve code execution,     although the latter has not been confirmed to be feasible. It affects gawk in versions 5.4.0 and below.
    (CVE-2026-40553)

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

An update of the gawk package has been released.

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2026-2035 advisory.

    Use After Free vulnerability has been found in io.c program file of gawk (do_getline_redir() routine).
    This issue may lead to a crash. It affects gawk in versions 5.4.0 and below. (CVE-2026-40467)

    Integer overflow vulnerability has been found in builtin.c program file of gawk. This issue may lead to     memory exhaustion on the hosting operating system and could be used to overwrite gawk heap metadata and     objects with attacker-controlled bytes. It affects gawk in versions 5.4.0 and below. (CVE-2026-40468)

    Buffer overflow vulnerability has been found in extension/readdir.c program file of gawk (ftype()     routine). This issue could be used to crash the program and potentially to achieve code execution,     although the latter has not been confirmed to be feasible. It affects gawk in versions 5.4.0 and below.
    (CVE-2026-40553)

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.

The remote SUSE Linux SLED15 / SLED_SAP15 / SLES15 / SLES_SAP15 host has a package installed that is affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:3455-1 advisory.

    - CVE-2026-40467: use-after-free in the `io.c` program file via the `do_getline_redir()` routine     (bsc#1271351).
    - CVE-2026-40468: integer overflow in the `builtin.c` program file (bsc#1271352).
    - CVE-2026-40553: buffer overflow in the `extension/readdir.c` program file via the `ftype()` routine     (bsc#1271354).

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

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

The remote openSUSE 16 host has a package installed that is affected by multiple vulnerabilities as referenced in the openSUSE-SU-2026:21393-1 advisory.

    - CVE-2026-40467: use-after-free vulnerability within the do_getline_redir() routine could lead to a     program crash       (bsc#1271351).
    - CVE-2026-40468: use-after-free vulnerability in gawk's io.c file could permit heap metadata     manipulation and host       memory exhaustion (bsc#1271352).
    - CVE-2026-40553: buffer overflow in the ftype() routine of the readdir extension could trigger a program     crash       (bsc#1271354).

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

Note that Nessus has not tested for these issues 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.

  - Use After Free vulnerability has been found in io.c program file of gawk (do_getline_redir() routine).
    This issue may lead to a crash. It affects gawk in versions 5.4.0 and below. (CVE-2026-40467)

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

ID	Name	Product	Family	Type	Severity
339714	CentOS 9 : gawk-5.1.0-7.el9	Nessus	CentOS Local Security Checks	Local	medium
338231	Photon OS 5.0: Gawk PHSA-2026-5.0-92-0966	Nessus	PhotonOS Local Security Checks	Local	medium
338229	Photon OS 5.0: Gawk PHSA-2026-5.0-91-0966	Nessus	PhotonOS Local Security Checks	Local	medium
332012	Amazon Linux 2023 : gawk, gawk-all-langpacks, gawk-devel (ALAS2023-2026-2035)	Nessus	Amazon Linux Local Security Checks	Local	medium
331838	SUSE SLED15 / SLES15 Security Update : gawk (SUSE-SU-2026:3455-1)	Nessus	SuSE Local Security Checks	Local	medium
329299	openSUSE 16 Security Update : gawk (openSUSE-SU-2026:21393-1)	Nessus	SuSE Local Security Checks	Local	medium
326570	Linux Distros Unpatched Vulnerability : CVE-2026-40467	Nessus	Misc.	Local	medium

Detections

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CVE-2026-40467

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Tenable Plugins

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medium