Red Hat Security Advisory: firefox security update
Affects Red Hat firefoxSource GCVE Database
Mentioned vulnerabilities
Not known to be exploited · fixed in Red Hat package updates : patch Red Hat firefox soon.
Data as of 3 Nov 2026, 23:50 UTC
Rated by Threat Radar · No CVSS score from NVD or the CNA
- Patch
- Available – fixed in 115.12.0
Exploitation evidence
Disclosed: evidence found.
CVE published 17 Jun 2024
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 3 Nov 2026.
What to do
AI-suggested
A security update upgrading Firefox to version 115.12.0 ESR is available from Red Hat. Users should apply this update promptly and restart Firefox for the changes to take effect. Red Hat provides official guidance on applying this update at https://access.redhat.com/articles/11258. No additional mitigation steps are indicated beyond applying the update and restarting the browser.
Description
Red Hat has issued a security update for Mozilla Firefox, upgrading it to version 115.12.0 ESR. This update addresses multiple security vulnerabilities including use-after-free bugs in networking and JavaScript object transplant, timing attacks leaking external protocol handlers, sandbox bypasses by iframes, cross-origin image leaks via Offscreen Canvas, memory corruption in text fragments, and other memory safety issues. The update is rated as important by Red Hat and requires restarting Firefox after installation.
References
- access.redhat.com/errata/RHSA-2024:3952 (opens in a new tab)
- access.redhat.com/security/updates/classification/ (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2291394 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2291395 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2291396 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2291397 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2291399 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2291400 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2291401 (opens in a new tab)
- security.access.redhat.com/data/csaf/v2/advisories/2024/rhsa-2024_3952.json (opens in a new tab)