Detections
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RHEL 8 : glibc (RHSA-2026:76777)

critical Nessus Plugin ID 363767

Synopsis

The remote Red Hat host is missing one or more security updates for glibc.

Description

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:76777 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: Process abort due to invalid memory in wordexp (CVE-2026-6368)

 * glibc: Denial of Service via stack exhaustion during tilde expansion (CVE-2026-6791)

 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 these issues but has instead relied only on the application's self-reported version number.

Solution

Update the RHEL glibc package based on the guidance in RHSA-2026:76777.

See Also

https://access.redhat.com/errata/RHSA-2026:76777

https://access.redhat.com/security/updates/classification/#moderate

https://issues.redhat.com/browse/RHEL-173106

http://www.nessus.org/u?b196650e

Plugin Details

Severity: Critical

ID: 363767

File Name: redhat-RHSA-2026-76777.nasl

Version: 1.1

Type: Local

Agent: unix

Published: 10/7/2026

Updated: 10/7/2026

Supported Sensors: Nessus Agent, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.9

Percentile: 52.41

Vendor

Vendor Severity: Moderate

CVSS v2

Risk Factor: Medium

Base Score: 5.7

Temporal Score: 4.2

Vector: CVSS2#AV:L/AC:L/Au:S/C:P/I:P/A:C

CVSS Score Source: CVE-2026-6791

CVSS v3

Risk Factor: Medium

Base Score: 5.9

Temporal Score: 5.2

Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

CVSS v4

Risk Factor: Critical

Base Score: 9

Threat Score: 6.6

Threat Vector: CVSS:4.0/E:U

Vector: CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:H/SC:N/SI:L/SA:H

Vulnerability Information

CPE: cpe:/o:redhat:enterprise_linux:8, cpe:/o:redhat:rhel_eus:8.10, p-cpe:/a:redhat:enterprise_linux:compat-libpthread-nonshared, p-cpe:/a:redhat:enterprise_linux:glibc-all-langpacks, p-cpe:/a:redhat:enterprise_linux:glibc-benchtests, p-cpe:/a:redhat:enterprise_linux:glibc-common, p-cpe:/a:redhat:enterprise_linux:glibc-devel, p-cpe:/a:redhat:enterprise_linux:glibc-doc, p-cpe:/a:redhat:enterprise_linux:glibc-gconv-extra, p-cpe:/a:redhat:enterprise_linux:glibc-headers, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-aa, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-af, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-agr, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-ak, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-am, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-an, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-anp, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-ar, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-as, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-ast, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-ayc, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-az, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-be, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-bem, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-ber, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-bg, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-bhb, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-bho, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-bi, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-bn, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-bo, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-br, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-brx, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-bs, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-byn, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-ca, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-ce, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-chr, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-cmn, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-crh, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-cs, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-csb, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-cv, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-cy, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-da, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-de, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-doi, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-dsb, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-dv, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-dz, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-el, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-en, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-eo, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-es, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-et, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-eu, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-fa, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-ff, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-fi, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-fil, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-fo, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-fr, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-fur, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-fy, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-ga, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-gd, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-gez, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-gl, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-gu, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-gv, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-ha, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-hak, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-he, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-hi, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-hif, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-hne, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-hr, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-hsb, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-ht, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-hu, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-hy, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-ia, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-id, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-ig, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-ik, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-is, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-it, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-iu, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-ja, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-ka, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-kab, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-kk, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-kl, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-km, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-kn, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-ko, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-kok, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-ks, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-ku, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-kw, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-ky, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-lb, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-lg, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-li, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-lij, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-ln, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-lo, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-lt, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-lv, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-lzh, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-mag, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-mai, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-mfe, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-mg, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-mhr, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-mi, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-miq, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-mjw, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-mk, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-ml, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-mn, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-mni, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-mr, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-ms, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-mt, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-my, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-nan, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-nb, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-nds, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-ne, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-nhn, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-niu, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-nl, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-nn, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-nr, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-nso, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-oc, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-om, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-or, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-os, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-pa, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-pap, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-pl, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-ps, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-pt, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-quz, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-raj, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-ro, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-ru, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-rw, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-sa, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-sah, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-sat, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-sc, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-sd, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-se, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-sgs, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-shn, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-shs, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-si, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-sid, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-sk, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-sl, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-sm, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-so, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-sq, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-sr, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-ss, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-st, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-sv, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-sw, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-szl, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-ta, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-tcy, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-te, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-tg, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-th, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-the, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-ti, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-tig, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-tk, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-tl, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-tn, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-to, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-tpi, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-tr, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-ts, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-tt, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-ug, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-uk, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-unm, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-ur, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-uz, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-ve, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-vi, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-wa, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-wae, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-wal, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-wo, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-xh, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-yi, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-yo, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-yue, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-yuw, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-zh, p-cpe:/a:redhat:enterprise_linux:glibc-langpack-zu, p-cpe:/a:redhat:enterprise_linux:glibc-locale-source, p-cpe:/a:redhat:enterprise_linux:glibc-minimal-langpack, p-cpe:/a:redhat:enterprise_linux:glibc-nss-devel, p-cpe:/a:redhat:enterprise_linux:glibc-static, p-cpe:/a:redhat:enterprise_linux:glibc-utils, p-cpe:/a:redhat:enterprise_linux:glibc, p-cpe:/a:redhat:enterprise_linux:libnsl, p-cpe:/a:redhat:enterprise_linux:nscd, p-cpe:/a:redhat:enterprise_linux:nss_db, p-cpe:/a:redhat:enterprise_linux:nss_hesiod

Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list, Host/cpu

Exploit Ease: No known exploits are available

Patch Publication Date: 10/7/2026

Vulnerability Publication Date: 8/10/2026

Reference Information

CVE: CVE-2026-6368, CVE-2026-6791

CWE: 120, 1341

RHSA: 2026:76777