Converting crafted EUC_JISX0213 input to UCS-4 or the internal wide character encoding, for example with iconv, in the GNU C Library version 2.3 to 2.44 may result in the converter making no progress, causing the calling application to hang. Some EUC_JISX0213 sequences decode to two code points. If the output buffer has room for only the first one, the converter stores the second in the conversion state and returns E2BIG, but it never clears that pending character after emitting it on the next call. The converter then keeps emitting the pending character without consuming further input, so an application that retries the conversion loops forever. The input must be attacker controlled and the application must convert it with an output buffer small enough to split the two code points. Only the EUC_JISX0213 character set is affected, which is not commonly used. The related defect in SHIFT_JISX0213 converter is tracked separately as CVE-2026-77117.

The remote SUSE Linux SLES12 / SLES_SAP12 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:4204-1 advisory.

    - CVE-2026-6368: wordexp WRDE_APPEND rollback restores stale we_wordv, leading to invalid free in wordfree       (bsc#1274726).
    - CVE-2026-6791: wordexp: unbounded alloca (strndupa) in parse_tilde (bsc#1274723).
    - CVE-2026-18374: overflow in the fopen ccs extension (bsc#1277262).
    - CVE-2026-19542: Fix out-of-bounds array write in tdelete (bsc#1276946).
    - CVE-2026-77117: non-progress DoS in SHIFT_JISX0213 -> UCS-4 conversion state handling (bsc#1277921).
    - CVE-2026-80489: non-progress DoS in SHIFT_JISX0213 -> UCS-4 conversion state handling (bsc#1277922).

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 Ubuntu 22.04 LTS / 26.04 LTS / Pro Realtime 22.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-8737-1 advisory.

    It was discovered that GNU C Library had a buffer overflow in the strfmon function when handling right-     justification padding. An attacker could possibly use this issue to cause a denial of service or execute     arbitrary code. This issue only affected Ubuntu 26.04 LTS. (CVE-2026-19499)

    It was discovered that GNU C Library had an out-of-bounds stack array access in the tdelete function. An     attacker could possibly use this issue to cause a denial of service or execute arbitrary code.
    (CVE-2026-19542)

    It was discovered that GNU C Library incorrectly handled memory when calling wordexp with the WRDE_APPEND     flag. An attacker could possibly use this issue to cause a denial of service. (CVE-2026-6368)

    It was discovered that GNU C Library had a stack overflow in the wordexp function when expanding paths     beginning with a tilde followed by a long username. An attacker could possibly use this issue to cause a     denial of service or execute arbitrary code. (CVE-2026-6791)

    It was discovered that GNU C Library had a hang in the SHIFT_JISX0213 character set converter. An attacker     could possibly use this issue to cause a denial of service. (CVE-2026-77117)

    It was discovered that GNU C Library had a hang in the EUC_JISX0213 character set converter. An attacker     could possibly use this issue to cause a denial of service. (CVE-2026-80489)

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

  - Debian Linux - glibc - None  Red Hat Enterprise Linux - glibc: Non-progress DoS in EUC_JISX0213 -> UCS-4     conversion state  Ubuntu Linux - EUC_JISX0213 converter hang in euc-jisx0213.c (CVE-2026-80489)

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

ID	Name	Product	Family	Type	Severity
346800	SUSE SLES12: glibc / glibc-32bit / glibc-devel / glibc-devel-32bit / etc (SUSE-SU-2026:4204-1)	Nessus	SuSE Local Security Checks	Local	critical
344610	Ubuntu 22.04 LTS / 26.04 LTS / Pro Realtime 22.04 LTS : GNU C Library vulnerabilities (USN-8737-1)	Nessus	Ubuntu Local Security Checks	Local	critical
341060	Linux Distros Unpatched Vulnerability : CVE-2026-80489	Nessus	Misc.	Local	medium

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CVE-2026-80489

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