The remote Redhat Enterprise Linux 8 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2026:33227 advisory.

    The glibc packages provide the standard C libraries (libc), POSIX thread libraries (libpthread), standard     math libraries (libm), and the name service cache daemon (nscd) used by multiple programs on the system.
    Without these libraries, the Linux system cannot function correctly.

    Security Fix(es):

    * glibc: glibc: Heap Buffer Overflow in `scanf` with `%mc` format specifier and large width     (CVE-2026-5450)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise 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 AlmaLinux 9 host has packages installed that are affected by a vulnerability as referenced in the ALSA-2026:33226 advisory.

    * glibc: glibc: Heap Buffer Overflow in `scanf` with `%mc` format specifier and large width     (CVE-2026-5450)


    Bug Fix(es) and Enhancement(s):

      * glibc: counter overflow in __wcsmbs_clone_conv if setlocale is called (JIRA:AlmaLinux-145156)

Tenable has extracted the preceding description block directly from the AlmaLinux 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.

According to the versions of the glibc packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

    Calling the scanf family of functions with a %mc (malloc'd character match) in the GNU C Library version     2.7 to version 2.43 with a format width specifier with an explicit width greater than 1024 could result in     a one byte heap buffer overflow.(CVE-2026-5450)

    Calling the ungetwc function on a FILE stream with wide characters encoded in a character set that has     overlaps between its single byte and multi-byte character encodings, in the GNU C Library version 2.43 or     earlier, may result in an attempt to read bytes before an allocated buffer, potentially resulting in     unintentional disclosure of neighboring data in the heap, or a program crash._x000D_
    _x000D_     A bug in the wide character pushback implementation (_IO_wdefault_pbackfail in libio/wgenops.c) causes     ungetwc() to operate on the regular character buffer (fp-_IO_read_ptr) instead of the actual wide-     stream read pointer (fp-_wide_data-_IO_read_ptr). The program crash may happen in cases where fp-
    _IO_read_ptr is not initialized and hence points to NULL. The buffer under-read requires a special     situation where the input character encoding is such that there are overlaps between single byte     representations and multibyte representations in that encoding, resulting in spurious matches. The     spurious match case is not possible in the standard Unicode character sets.(CVE-2026-5928)

    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._x000D_
    _x000D_
    _x000D_
    _x000D_     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 EulerOS glibc security advisory.

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

According to the versions of the glibc packages installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities :

    Calling the ungetwc function on a FILE stream with wide characters encoded in a character set that has     overlaps between its single byte and multi-byte character encodings, in the GNU C Library version 2.43 or     earlier, may result in an attempt to read bytes before an allocated buffer, potentially resulting in     unintentional disclosure of neighboring data in the heap, or a program crash.A bug in the wide character     pushback implementation (_IO_wdefault_pbackfail in libio/wgenops.c) causes ungetwc() to operate on the     regular character buffer (fp-_IO_read_ptr) instead of the actual wide-stream read pointer (fp-
    _wide_data-_IO_read_ptr). The program crash may happen in cases where fp-_IO_read_ptr is not     initialized and hence points to NULL. The buffer under-read requires a special situation where the input     character encoding is such that there are overlaps between single byte representations and multibyte     representations in that encoding, resulting in spurious matches. The spurious match case is not possible     in the standard Unicode character sets.(CVE-2026-5928)

    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)

    Calling the scanf family of functions with a %mc (malloc'd character match) in the GNU C Library version     2.7 to version 2.43 with a format width specifier with an explicit width greater than 1024 could result in     a one byte heap buffer overflow.(CVE-2026-5450)

Tenable has extracted the preceding description block directly from the EulerOS Virtualization glibc security advisory.

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

According to the versions of the glibc packages installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities :

    Calling the ungetwc function on a FILE stream with wide characters encoded in a character set that has     overlaps between its single byte and multi-byte character encodings, in the GNU C Library version 2.43 or     earlier, may result in an attempt to read bytes before an allocated buffer, potentially resulting in     unintentional disclosure of neighboring data in the heap, or a program crash.A bug in the wide character     pushback implementation (_IO_wdefault_pbackfail in libio/wgenops.c) causes ungetwc() to operate on the     regular character buffer (fp-_IO_read_ptr) instead of the actual wide-stream read pointer (fp-
    _wide_data-_IO_read_ptr). The program crash may happen in cases where fp-_IO_read_ptr is not     initialized and hence points to NULL. The buffer under-read requires a special situation where the input     character encoding is such that there are overlaps between single byte representations and multibyte     representations in that encoding, resulting in spurious matches. The spurious match case is not possible     in the standard Unicode character sets.(CVE-2026-5928)

    Calling the scanf family of functions with a %mc (malloc'd character match) in the GNU C Library version     2.7 to version 2.43 with a format width specifier with an explicit width greater than 1024 could result in     a one byte heap buffer overflow.(CVE-2026-5450)

    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 EulerOS Virtualization glibc 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 Oracle Linux 9 host has packages installed that are affected by a vulnerability as referenced in the ELSA-2026-50370 advisory.

    - CVE-2026-5450: Fix buffer overflow in scanf (RHEL-172710)
    - CVE-2026-4046: Fix assertion failure in IBM1390 and IBM1399 iconv modules       (RHEL-162901)

Tenable has extracted the preceding description block directly from the Oracle 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 Oracle Linux 9 host has packages installed that are affected by a vulnerability as referenced in the ELSA-2026-33226 advisory.

    - CVE-2026-5450: Fix buffer overflow in scanf (RHEL-172710)

Tenable has extracted the preceding description block directly from the Oracle 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.

ID	Name	Product	Family	Published	Updated	Severity
323848	RHEL 8 : glibc (RHSA-2026:33227)	Nessus	Red Hat Local Security Checks	6/30/2026	6/30/2026	critical
323947	AlmaLinux 9 : glibc (ALSA-2026:33226)	Nessus	Alma Linux Local Security Checks	6/30/2026	6/30/2026	critical
317382	Photon OS 5.0: Glibc PHSA-2026-5.0-0857	Nessus	PhotonOS Local Security Checks	5/28/2026	7/22/2026	critical
320226	EulerOS 2.0 SP13 : glibc (EulerOS-SA-2026-2333)	Nessus	Huawei Local Security Checks	6/10/2026	6/10/2026	critical
320234	EulerOS 2.0 SP13 : glibc (EulerOS-SA-2026-2290)	Nessus	Huawei Local Security Checks	6/10/2026	6/10/2026	critical
328521	EulerOS Virtualization 2.12.0 : glibc (EulerOS-SA-2026-2772)	Nessus	Huawei Local Security Checks	7/21/2026	7/21/2026	critical
328578	EulerOS Virtualization 2.10.1 : glibc (EulerOS-SA-2026-2819)	Nessus	Huawei Local Security Checks	7/21/2026	7/21/2026	critical
325060	Oracle Linux 9 : glibc (ELSA-2026-50370)	Nessus	Oracle Linux Local Security Checks	7/3/2026	7/3/2026	critical
324333	Oracle Linux 9 : glibc (ELSA-2026-33226)	Nessus	Oracle Linux Local Security Checks	7/1/2026	7/1/2026	critical

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