Calling tdelete on a sufficiently deep tree in the GNU C Library version 2.1 to 2.44 may write one pointer past the end of an alloca-allocated array on the stack, which may crash the application. The tdelete implementation keeps an explicit stack of parent nodes for rebalancing, which is grown as needed while descending the tree. Two rebalancing branches push an additional entry without checking the capacity, and write past the array when the stack is exactly full. Triggering this requires a node at a depth of exactly 40 (or 40 plus a multiple of 20), which implies a tree with at least a million nodes, so an attacker must drive a large number of insertions and deletions through an application that uses tsearch and tdelete. The written value is a pointer into a tree node and is not directly attacker controlled. No affected application in common distributions has been identified.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - Calling tdelete on a sufficiently deep tree in the GNU C Library version 2.1 to 2.44 may write one pointer
    past the end of an alloca-allocated array on the stack, which may crash the application. The tdelete
    implementation keeps an explicit stack of parent nodes for rebalancing, which is grown as needed while
    descending the tree. Two rebalancing branches push an additional entry without checking the capacity, and
    write past the array when the stack is exactly full. Triggering this requires a node at a depth of exactly
    40 (or 40 plus a multiple of 20), which implies a tree with at least a million nodes, so an attacker must
    drive a large number of insertions and deletions through an application that uses tsearch and tdelete. The
    written value is a pointer into a tree node and is not directly attacker controlled. No affected
    application in common distributions has been identified. (CVE-2026-19542)

The remote SUSE Linux SLES16 / SLES_SAP16 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:23934-1 advisory.

    - CVE-2026-6368: invalid free via wordexp WRDE_APPEND rollback (bsc#1274726).
    - CVE-2026-6791: stack overflow in wordexp tilde expansion (bsc#1274723).
    - CVE-2026-8674: reachable assert in `resolv/resolv_conf.c:update_from_conf` allows an attacker in a local     network to       trigger a process crash (bsc#1281297).
    - CVE-2026-18374: heap buffer overflow in the fopen ccs extension (bsc#1277262).
    - CVE-2026-19499: buffer overflow in strfmon right-justification padding (bsc#1276892).
    - CVE-2026-19542: out-of-bounds array write in tdelete (bsc#1276946).
    - CVE-2026-77117: SHIFT_JISX0213 decoding lacks pending character reset (bsc#1277921).
    - CVE-2026-80489: EUC_JISX0213 decoding lacks pending character reset (bsc#1277922).
    - CVE-2026-86805: TOCTOU race condition in the dynamic loader allows local attackers to escalate     privileges       (bsc#1282509).


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 packages installed that are affected by multiple vulnerabilities as referenced in the openSUSE-SU-2026:21968-1 advisory.

    - CVE-2026-6368: invalid free via wordexp WRDE_APPEND rollback (bsc#1274726).
    - CVE-2026-6791: stack overflow in wordexp tilde expansion (bsc#1274723).
    - CVE-2026-8674: reachable assert in `resolv/resolv_conf.c:update_from_conf` allows an attacker in a local     network to       trigger a process crash (bsc#1281297).
    - CVE-2026-18374: heap buffer overflow in the fopen ccs extension (bsc#1277262).
    - CVE-2026-19499: buffer overflow in strfmon right-justification padding (bsc#1276892).
    - CVE-2026-19542: out-of-bounds array write in tdelete (bsc#1276946).
    - CVE-2026-77117: SHIFT_JISX0213 decoding lacks pending character reset (bsc#1277921).
    - CVE-2026-80489: EUC_JISX0213 decoding lacks pending character reset (bsc#1277922).
    - CVE-2026-86805: TOCTOU race condition in the dynamic loader allows local attackers to escalate     privileges       (bsc#1282509).


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 SUSE Linux SLED15 / SLED_SAP15 / SLES15 / SLES_SAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:4250-1 advisory.

    - CVE-2026-6368: invalid free via wordexp WRDE_APPEND rollback (bsc#1274726).
    - CVE-2026-6791: stack overflow in wordexp tilde expansion (bsc#1274723).
    - CVE-2026-18374: heap buffer overflow in the fopen ccs extension (bsc#1277262).
    - CVE-2026-19499: buffer overflow in strfmon right-justification padding (bsc#1276892).
    - CVE-2026-19542: out-of-bounds array write in tdelete (bsc#1276946).
    - CVE-2026-77117: SHIFT_JISX0213 decoding lacks pending character reset (bsc#1277921).
    - CVE-2026-80489: EUC_JISX0213 decoding lacks pending character reset (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 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.

  - Calling tdelete on a sufficiently deep tree in the GNU C Library version 2.1 to 2.44 may write one pointer     past the end of an alloca-allocated array on the stack, which may crash the application. The tdelete     implementation keeps an explicit stack of parent nodes for rebalancing, which is grown as needed while     descending the tree. Two rebalancing branches push an additional entry without checking the capacity, and     write past the array when the stack is exactly full. Triggering this requires a node at a depth of exactly     40 (or 40 plus a multiple of 20), which implies a tree with at least a million nodes, so an attacker must     drive a large number of insertions and deletions through an application that uses tsearch and tdelete. The     written value is a pointer into a tree node and is not directly attacker controlled. No affected     application in common distributions has been identified. (CVE-2026-19542)

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

ID	Name	Product	Family	Type	Severity
464108	Echo: glibc: security update to 2.41-12+deb13u3+e4	Tenable Cloud Security	Echo Local Security Checks	Local	medium
464108	Echo: glibc: security update to 2.41-12+deb13u3+e4	Tenable Self-Hosted Container Security	Echo Local Security Checks	Local	medium
362572	SUSE SLES16: glibc / glibc-devel / glibc-devel-static / glibc-extra / etc (SUSE-SU-2026:23934-1)	Nessus	SuSE Local Security Checks	Local	critical
362508	openSUSE 16: cross-aarch64-glibc-devel / cross-ppc64le-glibc-devel / etc (openSUSE-SU-2026:21968-1)	Nessus	SuSE Local Security Checks	Local	critical
347899	SUSE SLED15: glibc / glibc-32bit / glibc-devel / glibc-devel-32bit / etc (SUSE-SU-2026:4250-1)	Nessus	SuSE Local Security Checks	Local	critical
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
339040	Linux Distros Unpatched Vulnerability : CVE-2026-19542	Nessus	Misc.	Local	medium

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