CVE-2025-49178
Xorg-x11-server-xwayland: xorg-x11-server: tigervnc: unprocessed client request due to bytes to ignore
- Published
- Updated
- Reserved
- Assigned by
- redhat
Description
A flaw was found in the X server's request handling. Non-zero 'bytes to ignore' in a client's request can cause the server to skip processing another client's request, potentially leading to a denial of service.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| redhatCNA (assigner) | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
| NVDNVD · Deferred | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.25% · top 84% of all CVEs (6 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Weakness
Affected products
- affected < 24.1.7
Red Hat · Red Hat Enterprise Linux 10
- unaffected 0:24.1.5-4.el10_0 – < *
Red Hat · Red Hat Enterprise Linux 6 Extended Lifecycle Support - EXTENSION
- unaffected 0:1.1.0-25.el6_10.1 – < *
Red Hat · Red Hat Enterprise Linux 7.7 Advanced Update Support
- unaffected 0:1.8.0-17.el7_7.1 – < *
Red Hat · Red Hat Enterprise Linux 7 Extended Lifecycle Support
- unaffected 0:1.20.4-32.el7_9 – < *
Red Hat · Red Hat Enterprise Linux 7 Extended Lifecycle Support
- unaffected 0:1.8.0-36.el7_9.2 – < *
Red Hat · Red Hat Enterprise Linux 8
- unaffected 0:1.20.11-26.el8_10 – < *
Red Hat · Red Hat Enterprise Linux 8
- unaffected 0:21.1.3-18.el8_10 – < *
Red Hat · Red Hat Enterprise Linux 8
- unaffected 0:1.15.0-7.el8_10 – < *
Red Hat · Red Hat Enterprise Linux 8.2 Advanced Update Support
- unaffected 0:1.9.0-15.el8_2.14 – < *
Red Hat · Red Hat Enterprise Linux 8.2 Advanced Update Support
- unaffected 0:1.20.6-4.el8_2 – < *
Red Hat · Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
- unaffected 0:1.20.10-2.el8_4 – < *
Red Hat · Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
- unaffected 0:1.11.0-8.el8_4.13 – < *
Red Hat · Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On
- unaffected 0:1.20.10-2.el8_4 – < *
Red Hat · Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On
- unaffected 0:1.11.0-8.el8_4.13 – < *
Red Hat · Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support
- unaffected 0:1.12.0-6.el8_6.14 – < *
Red Hat · Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support
- unaffected 0:21.1.3-2.el8_6.4 – < *
Red Hat · Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support
- unaffected 0:1.20.11-5.el8_6.3 – < *
Red Hat · Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On
- unaffected 0:1.12.0-6.el8_6.14 – < *
Red Hat · Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On
- unaffected 0:21.1.3-2.el8_6.4 – < *
Red Hat · Red Hat Enterprise Linux 8.6 Telecommunications Update Service
- unaffected 0:1.12.0-6.el8_6.14 – < *
Red Hat · Red Hat Enterprise Linux 8.6 Telecommunications Update Service
- unaffected 0:21.1.3-2.el8_6.4 – < *
Red Hat · Red Hat Enterprise Linux 8.6 Telecommunications Update Service
- unaffected 0:1.20.11-5.el8_6.3 – < *
Red Hat · Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions
- unaffected 0:1.12.0-6.el8_6.14 – < *
Red Hat · Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions
- unaffected 0:21.1.3-2.el8_6.4 – < *
Red Hat · Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions
- unaffected 0:1.20.11-5.el8_6.3 – < *
Red Hat · Red Hat Enterprise Linux 8.8 Extended Update Support Long-Life Add-On
- unaffected 0:1.20.11-16.el8_8 – < *
Red Hat · Red Hat Enterprise Linux 8.8 Extended Update Support Long-Life Add-On
- unaffected 0:21.1.3-11.el8_8 – < *
Red Hat · Red Hat Enterprise Linux 8.8 Telecommunications Update Service
- unaffected 0:1.20.11-16.el8_8 – < *
Red Hat · Red Hat Enterprise Linux 8.8 Telecommunications Update Service
- unaffected 0:1.12.0-15.el8_8.14 – < *
Red Hat · Red Hat Enterprise Linux 8.8 Telecommunications Update Service
- unaffected 0:21.1.3-11.el8_8 – < *
Red Hat · Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions
- unaffected 0:1.20.11-16.el8_8 – < *
Red Hat · Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions
- unaffected 0:1.12.0-15.el8_8.14 – < *
Red Hat · Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions
- unaffected 0:21.1.3-11.el8_8 – < *
Red Hat · Red Hat Enterprise Linux 9
- unaffected 0:1.20.11-31.el9_6 – < *
Red Hat · Red Hat Enterprise Linux 9
- unaffected 0:23.2.7-4.el9_6 – < *
Red Hat · Red Hat Enterprise Linux 9
- unaffected 0:1.14.1-8.el9_6 – < *
Red Hat · Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions
- unaffected 0:21.1.3-3.el9_0 – < *
Red Hat · Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions
- unaffected 0:1.20.11-11.el9_0 – < *
Red Hat · Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions
- unaffected 0:1.11.0-22.el9_0.15 – < *
Red Hat · Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions
- unaffected 0:21.1.3-8.el9_2 – < *
Red Hat · Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions
- unaffected 0:1.20.11-18.el9_2 – < *
Red Hat · Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions
- unaffected 0:1.12.0-14.el9_2.12 – < *
Red Hat · Red Hat Enterprise Linux 9.4 Extended Update Support
- unaffected 0:22.1.9-6.el9_4 – < *
Red Hat · Red Hat Enterprise Linux 9.4 Extended Update Support
- unaffected 0:1.20.11-26.el9_4 – < *
Red Hat · Red Hat Enterprise Linux 9.4 Extended Update Support
- unaffected 0:1.13.1-8.el9_4.7 – < *
Red Hat · Red Hat Enterprise Linux 6
All versions: affected
What to do
Workaround: Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
References (33)
- RHSA-2025:10258 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2025:10342 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2025:10343 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2025:10344 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2025:10346 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2025:10347 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2025:10348 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2025:10349 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2025:10350 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2025:10351 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2025:10352 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2025:10355 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2025:10356 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2025:10360 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2025:10370 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2025:10374 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2025:10375 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2025:10376 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2025:10377 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2025:10378 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2025:10381 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2025:10410 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2025:9303 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2025:9304 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2025:9305 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2025:9306 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2025:9392 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2025:9964 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/security/cve/CVE-2025-49178 (opens in a new tab)vdb-entryx_refsource_REDHAT
- RHBZ#2369977 (opens in a new tab)issue-trackingx_refsource_REDHAT
- https://gitlab.freedesktop.org/xorg/xserver/-/commit/d55c54cecb5e83eaa2d56bed5cc4461f9ba318c2 (opens in a new tab)
- https://www.x.org/wiki/Development/Security/ (opens in a new tab)
- https://lists.debian.org/debian-lts-announce/2025/06/msg00028.html (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2025-49178)Record last updated .