Bundesamt für Sicherheit in der Informationstechnik Fedora · Red Hat Enterprise Linux (libsoup): Mehrere Schwachstellen
Affects Bundesamt für Sicherheit in der Informationstechnik FedoraSource GCVE Database
Mentioned vulnerabilities
Not known to be exploited · CVSS 8.6 High.
Data as of 12 Nov 2026, 12:18 UTC
Thin evidence
One scorer or none| CNA (redhat) | CVSS 3.1 | 8.6 |
|---|
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:HExploitation evidence
Disclosed: evidence found.
CVE published 29 Sep 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 12 Nov 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| Red Hat Enterprise Linux 10libsoup3 | Affected– | Fixed in– |
| Red Hat Enterprise Linux 10libsoup3 | Affected– | Fixed in– |
| Red Hat Enterprise Linux 10.0 Extended Update Supportlibsoup3 | Affected– | Fixed in– |
| Red Hat Enterprise Linux 7 Extended Lifecycle Supportlibsoup | Affected– | Fixed in– |
| Red Hat Enterprise Linux 8libsoup | Affected– | Fixed in– |
| Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Supportlibsoup | Affected– | Fixed in– |
AI-suggested
Red Hat has released security updates for Red Hat Enterprise Linux 9 that address these heap buffer overflow vulnerabilities in libsoup. Users should apply the updates as described in the Red Hat advisory RHSA-2026:83384 and the referenced article https://access.redhat.com/articles/11258. Applying these official patches is the recommended remediation. No additional mitigation steps are indicated by the vendor.
Description
Multiple heap buffer overflow vulnerabilities have been identified in the libsoup library used in Red Hat Enterprise Linux 9. These vulnerabilities affect WebSocket handling, including Pong signal type confusion, message reassembly, receive-buffer growth, client-frame masking, and outgoing permessage-deflate buffer growth. Red Hat has released security updates addressing these issues.
References
- wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-3952.json (opens in a new tab)
- wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-3952 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:83384 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:83618 (opens in a new tab)
- linux.oracle.com/errata/ELSA-2026-83384.html (opens in a new tab)
- linux.oracle.com/errata/ELSA-2026-83618.html (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:84586 (opens in a new tab)
- lists.suse.com/pipermail/sle-security-updates/2026-October/029883.html (opens in a new tab)
- errata.build.resf.org/RLSA-2026:83384 (opens in a new tab)
- lists.suse.com/pipermail/sle-security-updates/2026-October/029876.html (opens in a new tab)
- lists.suse.com/pipermail/sle-security-updates/2026-October/029903.html (opens in a new tab)
- linux.oracle.com/errata/ELSA-2026-84586.html (opens in a new tab)
- errata.build.resf.org/RLSA-2026:84586 (opens in a new tab)
- lists.opensuse.org/archives/list/security-announce@lists.opensuse.org/thread/U65YW43DMOOV5GF3RTEYWLX6PLLKDGOB/ (opens in a new tab)
- lists.suse.com/pipermail/sle-security-updates/2026-October/030163.html (opens in a new tab)
- bodhi.fedoraproject.org/updates/FEDORA-2026-f06a7887af (opens in a new tab)
- bodhi.fedoraproject.org/updates/FEDORA-2026-6c3a4775a6 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:92347 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:93466 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:93446 (opens in a new tab)