Red Hat Security Advisory: coreutils security update
Affects Red Hat coreutilsSource GCVE Database
Mentioned vulnerabilities
Not known to be exploited · CVSS 4.6 Medium.
Data as of 5 Nov 2026, 22:34 UTC
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:L/SC:N/SI:N/SA:NExploitation evidence
Disclosed: evidence found.
CVE published 24 Jul 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 5 Nov 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| GNUcoreutils | Affected
| Fixed in– |
Description
The coreutils packages contain the GNU Core Utilities and represent a combination of the previously used GNU fileutils, sh-utils, and textutils packages. Security Fix(es): * coreutils: GNU coreutils uniq: Denial of Service and information disclosure via out-of-bounds read with multibyte input (CVE-2026-56391) * coreutils: GNU coreutils unexpand: Denial of Service via crafted tab stop values (CVE-2026-56392) 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.
References
- access.redhat.com/errata/RHSA-2026:67886 (opens in a new tab)
- access.redhat.com/security/updates/classification/ (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2506691 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2506694 (opens in a new tab)
- security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_67886.json (opens in a new tab)