Red Hat Security Advisory: compat-openssl10 security update
Affects Red Hat compat-openssl10Source GCVE Database
Not known to be exploited.
Data as of 30 Oct 2026, 01:29 UTC
Rated by Threat Radar · No CVSS score from NVD or the CNA
Exploitation evidence
Disclosed: evidence found.
CVE published 23 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 29 Oct 2026.
What to do
AI-suggested
Red Hat has released updated compat-openssl10 packages for Red Hat Enterprise Linux 8.6 Extended Life Cycle and AUS variants that fix this vulnerability. Users should apply the security update as described in Red Hat advisory RHSA-2026:44480 and the referenced article https://access.redhat.com/articles/11258 to remediate the issue. No additional mitigation steps are indicated by the vendor.
Description
A denial of service vulnerability (CVE-2026-28390) exists in the compat-openssl10 package used in Red Hat Enterprise Linux 8.6. The flaw is due to a NULL pointer dereference during CMS EnvelopedData processing in OpenSSL libraries provided for compatibility with older software. This vulnerability has been rated as having moderate security impact by Red Hat.