The iconv() function in the GNU C Library versions 2.43 and earlier may crash due to an assertion failure when converting inputs from the IBM1390 or IBM1399 character sets, which may be used to remotely crash an application. This vulnerability can be trivially mitigated by removing the IBM1390 and IBM1399 character sets from systems that do not need them.

The remote Fedora 43 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-4b7780802c advisory.

    This update provides various security fixes.

    * Buffer overflow in `scanf` `%mc` (CVE-2026-5450)
    * `ns_sprintrrf` buffer overreads (CVE-2026-6238)
    * `ns_sprintrrf` buffer overflow in TSIG record processing (CVE-2026-5435)
    * Memory corruption in `ungetwc` (CVE-2026-5928)
    * Assertion failure in `iconv` with IBM1390, IBM1399 charsets (CVE-2026-4046)


Tenable has extracted the preceding description block directly from the Fedora 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 Fedora 44 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-ced72ab158 advisory.

    This update provides various security fixes.

    * Buffer overflow in `scanf` `%mc` (CVE-2026-5450)
    * `ns_sprintrrf` buffer overreads (CVE-2026-6238)
    * `ns_sprintrrf` buffer overflow in TSIG record processing (CVE-2026-5435)
    * Memory corruption in `ungetwc` (CVE-2026-5928)
    * Assertion failure in `iconv` with IBM1390, IBM1399 charsets (CVE-2026-4046)


Tenable has extracted the preceding description block directly from the Fedora 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 SLES15 host has a package installed that is affected by a vulnerability as referenced in the SUSE- SU-2026:1662-1 advisory.

    This update for glibc-livepatches fixes the following issue:

    Security fixes:

    - CVE-2026-4046: assertion failure when converting inputs may be used to remotely crash an application     (bsc#1261209).

    Other fixes:

    - Fix problems with livepatches targeting libc-2.31.so instead of      libc.so.6 in 15.4 (bsc#1263035).

Tenable has extracted the preceding description block directly from the SUSE 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 ALAS2023-2026-1622 advisory.

    The iconv() function in the GNU C Library versions 2.43 and earlier may crash due to an assertion failure     when converting inputs from the IBM1390 or IBM1399 character sets, which may be used to remotely crash an     application.



    This vulnerability can be trivially mitigated by removing the IBM1390 and IBM1399 character sets from     systems that do not need them. (CVE-2026-4046)

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.

The version of glibc installed on the remote host is prior to 2.26-64. It is, therefore, affected by a vulnerability as referenced in the ALAS2-2026-3272 advisory.

    The iconv() function in the GNU C Library versions 2.43 and earlier may crash due to an assertion failure     when converting inputs from the IBM1390 or IBM1399 character sets, which may be used to remotely crash an     application.



    This vulnerability can be trivially mitigated by removing the IBM1390 and IBM1399 character sets from     systems that do not need them. (CVE-2026-4046)

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.

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-014283 advisory.

    The iconv() function in the GNU C Library versions 2.43 and earlier may crash due to an assertion failure     when converting inputs from the IBM1390 or IBM1399 character sets, which may be used to remotely crash an     application.



    This vulnerability can be trivially mitigated by removing the IBM1390 and IBM1399 character sets from     systems that do not need them.

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 remote SUSE Linux SLES15 host has a package installed that is affected by a vulnerability as referenced in the SUSE- SU-2026:1498-1 advisory.

    This update for glibc-livepatches fixes the following issue:

    - CVE-2026-4046: assertion failure when converting inputs may be used to remotely crash an application     (bsc#1261209).

Tenable has extracted the preceding description block directly from the SUSE 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 remote SUSE Linux SLES15 host has a package installed that is affected by a vulnerability as referenced in the SUSE- SU-2026:1501-1 advisory.

    This update for glibc-livepatches fixes the following issue:

    - CVE-2026-4046: assertion failure when converting inputs may be used to remotely crash an application     (bsc#1261209).

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

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

An update of the glibc package has been released.

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

  - The iconv() function in the GNU C Library versions 2.43 and earlier may crash due to an assertion failure     when converting inputs from the IBM1390 or IBM1399 character sets, which may be used to remotely crash an     application. This vulnerability can be trivially mitigated by removing the IBM1390 and IBM1399 character     sets from systems that do not need them. (CVE-2026-4046)

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

ID	Name	Product	Family	Severity
312242	Fedora 43 : glibc (2026-4b7780802c)	Nessus	Fedora Local Security Checks	critical
311773	Fedora 44 : glibc (2026-ced72ab158)	Nessus	Fedora Local Security Checks	critical
311750	SUSE SLES15 Security Update : glibc-livepatches (SUSE-SU-2026:1662-1)	Nessus	SuSE Local Security Checks	high
311343	Amazon Linux 2023 : compat-libpthread-nonshared, glibc, glibc-all-langpacks (ALAS2023-2026-1622)	Nessus	Amazon Linux Local Security Checks	high
311224	Amazon Linux 2 : glibc, --advisory ALAS2-2026-3272 (ALAS-2026-3272)	Nessus	Amazon Linux Local Security Checks	high
309987	Unity Linux 20.1050e / 20.1060e / 20.1070e Security Update: glibc (UTSA-2026-014283)	Nessus	Unity Linux Local Security Checks	high
309165	SUSE SLES15 Security Update : glibc-livepatches (SUSE-SU-2026:1498-1)	Nessus	SuSE Local Security Checks	high
309119	SUSE SLES15 Security Update : glibc-livepatches (SUSE-SU-2026:1501-1)	Nessus	SuSE Local Security Checks	high
306996	Photon OS 5.0: Glibc PHSA-2026-5.0-0824	Nessus	PhotonOS Local Security Checks	high
304363	Linux Distros Unpatched Vulnerability : CVE-2026-4046	Nessus	Misc.	high

Detections

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CVE-2026-4046

high

Tenable Plugins

critical

critical

high

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high

high

high

high

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high