Skip to main content
CVE-2026-102556VulnerabilityPublished Updated

Bundesamt für Sicherheit in der Informationstechnik Fedora · Red Hat Enterprise Linux (libsoup): Mehrere Schwachstellen

Affects Bundesamt für Sicherheit in der Informationstechnik FedoraSource GCVE Database

0
Compare

Mentioned vulnerabilities

Authoritative record:CVE-2026-102556· High 8.6

Not known to be exploited · CVSS 8.6 High.

Data as of 12 Nov 2026, 12:18 UTC

CVSS 3.1 base score
8.6High
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CNA (redhat)CVSS 3.18.6
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 29 Sep 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: 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 12 Nov 2026.

What to do

Affected software

ProductAffectedFixed in
Red Hat Enterprise Linux 10libsoup3Affected–Fixed in–
Red Hat Enterprise Linux 10libsoup3Affected–Fixed in–
Red Hat Enterprise Linux 10.0 Extended Update Supportlibsoup3Affected–Fixed in–
Red Hat Enterprise Linux 7 Extended Lifecycle SupportlibsoupAffected–Fixed in–
Red Hat Enterprise Linux 8libsoupAffected–Fixed in–
Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update SupportlibsoupAffected–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

Community reviews

Loading reviews…