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CVE-2025-4918VulnerabilityPublished Updated

Red Hat Security Advisory: firefox security update

Affects Red HatSource GCVE Database

0

Mentioned vulnerabilities

Not known to be exploited.

Data as of 25 Oct 2026, 19:02 UTC

Severity
High

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

EPSS
9.5% chance of exploitation in 30 days – higher than 95% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 3 Jun 2025

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  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), the Metasploit, Exploit-DB and nuclei-templates index as of 2026-10-25.

What to do

Affected software

ProductAffectedFixed in
Red Hatredhat/firefoxpkg:rpm/redhat/firefoxOther threatsAffected
  • =7.*
Fixed in–

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Red Hat has released updated Firefox packages for Red Hat Enterprise Linux 7 Extended Lifecycle Support to address these vulnerabilities. Users should apply the provided security update (firefox-128.10.1-1.el7_9) as detailed in the Red Hat advisory RHSA-2025:8465 and the referenced update article (https://access.redhat.com/articles/11258). No additional mitigation steps are indicated by the vendor.

Description

Red Hat has issued a security advisory for Mozilla Firefox addressing two vulnerabilities involving out-of-bounds access: one when resolving Promise objects (CVE-2025-4918) and another when optimizing linear sums (CVE-2025-4919). These issues affect Red Hat Enterprise Linux 7 Extended Lifecycle Support versions. The vulnerabilities are rated as important by Red Hat Product Security. Updates are available to remediate these issues.

References

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