Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update
Affects Red HatSource GCVE Database
Not known to be exploited · CVSS 4.0 Medium : upgrade Red Hat to 1.44 when convenient.
Data as of 31 Oct 2026, 20:20 UTC
- EPSS
- 0.1% chance of exploitation in 30 days – higher than 3% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 1.44
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:LExploitation evidence
Disclosed: evidence found.
CVE published 23 Jun 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 31 Oct 2026.
What to do
Upgrade libidn to 1.44.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| GNUlibidn | Affected
| Fixed in
|
AI-suggested
No configuration-level mitigation is available because the vulnerability depends on uninitialized stack content, making behavior non-deterministic and input filtering ineffective. Users should update to a fixed version of the libidn package once it is released. If you cannot patch yet, applications processing untrusted internationalized domain names should treat the output of idna_to_unicode_8z8z()/idna_to_unicode_8zlz() as unverified, perform independent comparisons against the original ACE-encoded input, or switch to using libidn2 for IDNA processing, which is not affected by this vulnerability.
Description
This update for libidn fixes the following issue: - CVE-2026-57053: out-of-bounds read in `ToUnicode` APIs (bsc#1268965).
References
- access.redhat.com/errata/RHSA-2026:42125 (opens in a new tab)
- images.redhat.com (opens in a new tab)
- access.redhat.com/security/cve/CVE-2026-57053 (opens in a new tab)
- access.redhat.com/security/updates/classification/ (opens in a new tab)
- security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_42125.json (opens in a new tab)
- suse.com/support/security/rating/ (opens in a new tab)
- ftp.suse.com/pub/projects/security/csaf/opensuse-su-2026_21758-1.json (opens in a new tab)
- bugzilla.suse.com/1268965 (opens in a new tab)
- suse.com/security/cve/CVE-2026-57053/ (opens in a new tab)
- ftp.suse.com/pub/projects/security/csaf/suse-su-2026_23621-1.json (opens in a new tab)
- suse.com/support/update/announcement/2026/suse-su-202623621-1/ (opens in a new tab)
- lists.suse.com/pipermail/sle-security-updates/2026-September/029075.html (opens in a new tab)