Red HatCVE-2026-102559
Red Hat libsoup.: buffer overflow
High8.6CVE-2026-102559 · Published Sep 29, 2026 · updated Sep 30, 2026
A flaw was found in libsoup. When constructing a masked WebSocket client frame for a very large outgoing payload, size values passed to GByteArray allocation APIs could be truncated while the masking routine still used the full length, causing a heap buffer overflow.
Affected versions
| Package | Affected | Fixed in |
|---|---|---|
| Red Hat Enterprise Linux 10 Product | all versions | No fix yet |
| Red Hat Enterprise Linux 6 Product | all versions | No fix yet |
| Red Hat Enterprise Linux 7 Product | all versions | No fix yet |
| Red Hat Enterprise Linux 8 Product | all versions | No fix yet |
| Red Hat Enterprise Linux 9 Product | all versions | No fix yet |
Details and references
- CVSS 3.1
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H
- Severity from
- the vendor (its own CVE record or advisory)
- Weakness
- CWE-125
More Red Hat advisories
All Red Hat| Date | Advisory | Severity | Fixed in |
|---|---|---|---|
| Sep 29 | Red Hat libsoup.: buffer overflow | High8.6 | No fix yet |
| Sep 29 | Red Hat libsoup.: buffer overflow | High8.6 | No fix yet |
| Sep 29 | Red Hat libsoup: out-of-bounds read | High8.2 | No fix yet |
| Sep 29 | Red Hat libsoup.: type confusion | High8.6 | No fix yet |
| Sep 29 | Red Hat libsoup.: out-of-bounds read | High8.6 | No fix yet |
| Sep 29 | Red Hat OpenShift Virtualization 4: denial of service | Medium6.5 | No fix yet |