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CVE-2026-45447VulnerabilityPublished Updated

Red Hat Security Advisory: compat-openssl11 security update

Affects Red Hat compat-openssl11Source GCVE Database

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Not known to be exploited.

Data as of 29 Oct 2026, 08:12 UTC

Severity
High

Rated by Threat Radar · No CVSS score from NVD or the CNA

EPSS
4.0% chance of exploitation in 30 days – higher than 90% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 23 Jul 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: evidence found.

    Public exploit code: GitHub proofs of concept

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq 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), GitHub proofs of concept, the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.

What to do

AI-suggested

Red Hat has released an updated compat-openssl11 package (version 1.1.1k-5.el9_8.4) that fixes the heap use-after-free vulnerability. Users of Red Hat Enterprise Linux 9 should apply this update promptly. For detailed update instructions, refer to the Red Hat advisory at https://access.redhat.com/articles/11258. No additional mitigations are specified or required beyond applying the official update.

Description

A heap use-after-free vulnerability exists in the OpenSSL PKCS7_verify() function in the compat-openssl11 package used by Red Hat Enterprise Linux 9. This flaw could potentially lead to memory corruption. Red Hat has issued a security update to address this issue in the compat-openssl11 package. The update is rated as Important by Red Hat Product Security.

Reports on CVE-2026-45447

References

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