CVE-2026-102556: Red Hat Enterprise Linux 10 · Access of Resource Using Incompatible Type
Affects Red Hat Enterprise Linux 10Source CVE Database V5
Not known to be exploited · CVSS 8.6 High.
Data as of 13 Nov 2026, 12:10 UTC
Thin evidence
One scorer or none| CNA (redhat) | CVSS 3.1 | 8.6 |
|---|
- EPSS
- 0.4% chance of exploitation in 30 days – higher than 40% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- CISA SSVC
- Exploitation
- No evidence of active exploitation and no public proof of concept
- Automatable
- Attackers can reliably automate steps 1–4 of the kill chain
- Technical impact
- Limited control over the software or limited information exposure
CISA SSVC assessment, 2026-09-29.
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 13 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 libsoup that address this vulnerability. Users should apply the official Red Hat Enterprise Linux security update as described in Red Hat Advisory RHSA-2026:83384. The advisory provides detailed instructions for updating affected packages. No additional mitigation is required once the update is applied.
Description
A flaw was found in libsoup. When handling an incoming WebSocket Pong frame, SoupWebsocketConnection emitted the ::pong signal with a GByteArray pointer even though the signal is declared to pass a GBytes. Applications connecting a handler that follows the documented GBytes API can trigger heap corruption or a crash upon receiving a crafted Pong.
References
- access.redhat.com/errata/RHSA-2026:83384 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:83618 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:84586 (opens in a new tab)
- access.redhat.com/security/cve/CVE-2026-102556 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2543229 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:92347 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:93445 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:93447 (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)
- access.redhat.com/errata/RHSA-2026:93465 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:93583 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:93716 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:98453 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:98560 (opens in a new tab)