# CVE-2025-49176: Xorg-x11-server-xwayland: xorg-x11-server: tigervnc: integer overflow in big requests extension > An integer overflow in the Xorg Big Requests extension allows bypassing size checks, potentially leading to denial of service. - **Severity:** High 7.3 (`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:H`) - **Exploited in the wild:** Not known - **Login needed:** Any signed-in user - **Attackable:** Local or same network only - **Victim action needed:** Not needed - **Fix available:** Yes - **Published:** 17 Jun 2025 - **Updated:** 30 Jun 2026 - **Also known as:** AZL-64196, AZL-64232, BELL-CVE-2025-49176, CLSA-2025-1760646154, CLSA-2025-1761056680, DEBIAN-CVE-2025-49176, GHSA-c5wx-c74v-9c3g, OESA-2026-2141, OESA-2026-2142, OESA-2026-2143, SUSE-SU-2025:02187-1, SUSE-SU-2025:02191-1, SUSE-SU-2025:02192-1, SUSE-SU-2025:02206-1, SUSE-SU-2025:02207-1, SUSE-SU-2025:02208-1, SUSE-SU-2025:02224-1, SUSE-SU-2025:02225-1, UBUNTU-CVE-2025-49176 ## What is CVE-2025-49176? CVE-2025-49176 is a high-severity vulnerability in Red Hat Enterprise Linux 10, published on 17 Jun 2025. It can only be exploited from the same machine or local network, with no action from the victim. ### Official description A flaw was found in the Big Requests extension. The request length is multiplied by 4 before checking against the maximum allowed size, potentially causing an integer overflow and bypassing the size check. Weakness: CWE-190 (Integer Overflow or Wraparound) ## Which versions are affected by CVE-2025-49176? | Package | Ecosystem | Affected | Fixed in | | --- | --- | --- | --- | | `xorg-x11-server` | SUSE:Enterprise Storage 7.1 | All versions | 1.20.3-150200.22.5.108.1 | | `xorg-x11-server` | SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSS | All versions | 1.20.3-150200.22.5.108.1 | | `xorg-x11-server` | SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOS | All versions | 1.20.3-150400.38.60.1 | | `xorg-x11-server` | SUSE:Linux Enterprise High Performance Computing 15 SP4-LTSS | All versions | 1.20.3-150400.38.60.1 | | `xorg-x11-server` | SUSE:Linux Enterprise High Performance Computing 15 SP5-ESPOS | All versions | 21.1.4-150500.7.38.1 | | `xorg-x11-server` | SUSE:Linux Enterprise High Performance Computing 15 SP5-LTSS | All versions | 21.1.4-150500.7.38.1 | | `xorg-x11-server` | SUSE:Linux Enterprise Module for Basesystem 15 SP6 | All versions | 21.1.11-150600.5.15.1 | | `xorg-x11-server` | SUSE:Linux Enterprise Module for Basesystem 15 SP7 | All versions | 21.1.15-150700.5.6.1 | | `xorg-x11-server` | SUSE:Linux Enterprise Module for Development Tools 15 SP6 | All versions | 21.1.11-150600.5.15.1 | | `xorg-x11-server` | SUSE:Linux Enterprise Module for Development Tools 15 SP7 | All versions | 21.1.15-150700.5.6.1 | | `xorg-x11-server` | SUSE:Linux Enterprise Server 12 SP5-LTSS | All versions | 1.19.6-10.86.1 | | `xorg-x11-server` | SUSE:Linux Enterprise Server 15 SP3-LTSS | All versions | 1.20.3-150200.22.5.108.1 | | `xorg-x11-server` | SUSE:Linux Enterprise Server 15 SP4-LTSS | All versions | 1.20.3-150400.38.60.1 | | `xorg-x11-server` | SUSE:Linux Enterprise Server 15 SP5-LTSS | All versions | 21.1.4-150500.7.38.1 | | `xorg-x11-server` | SUSE:Linux Enterprise Server LTSS Extended Security 12 SP5 | All versions | 1.19.6-10.86.1 | | `xorg-x11-server` | SUSE:Linux Enterprise Server for SAP Applications 15 SP3 | All versions | 1.20.3-150200.22.5.108.1 | | `xorg-x11-server` | SUSE:Linux Enterprise Server for SAP Applications 15 SP4 | All versions | 1.20.3-150400.38.60.1 | | `xorg-x11-server` | SUSE:Linux Enterprise Server for SAP Applications 15 SP5 | All versions | 21.1.4-150500.7.38.1 | | `xorg-x11-server` | SUSE:Linux Enterprise Workstation Extension 15 SP6 | All versions | 1.20.3-150200.22.5.108.1 | | `xwayland` | SUSE:Linux Enterprise Workstation Extension 15 SP6 | All versions | 24.1.1-150600.5.15.1 | | `xorg-x11-server` | SUSE:Linux Enterprise Workstation Extension 15 SP7 | All versions | 1.20.3-150200.22.5.108.1 | | `xwayland` | SUSE:Linux Enterprise Workstation Extension 15 SP7 | All versions | 24.1.5-150700.3.6.1 | | `xorg-x11-server` | SUSE:Manager Proxy 4.3 | All versions | 1.20.3-150400.38.60.1 | | `xorg-x11-server` | SUSE:Manager Server 4.3 | All versions | 1.20.3-150400.38.60.1 | | `xorg-x11-server` | openSUSE:Leap 15.6 | All versions | 21.1.11-150600.5.15.1 | | `xwayland` | openSUSE:Leap 15.6 | All versions | 24.1.1-150600.5.15.1 | ## How do I fix CVE-2025-49176? Apply the vendor's patch. ## Is CVE-2025-49176 being exploited? There is no known exploitation of CVE-2025-49176 in the wild and no public exploit code. ## Fix prompt for AI coding agents ```text Check this codebase for CVE-2025-49176 and fix it if it is affected. What it is: CVE-2025-49176 is a high-severity vulnerability in Red Hat Enterprise Linux 10, published on 17 Jun 2025. It can only be exploited from the same machine or local network, with no action from the victim. Exploitation: There is no known exploitation of CVE-2025-49176 in the wild and no public exploit code. Affected product: Red Hat Enterprise Linux 10. No package-level version data is available, so check the vendor advisory linked from the reference page. Task: 1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies. 2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it. 3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead. 4. Run the tests and summarise what changed and why. 5. If nothing in the project is affected, say so and change nothing. Reference: https://insights.sbomify.com/CVE-2025-49176/ (Markdown: https://insights.sbomify.com/CVE-2025-49176/index.md) ``` ## Sources - CVE record: https://www.cve.org/CVERecord?id=CVE-2025-49176 - NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-49176 - OSV: https://osv.dev/vulnerability/CVE-2025-49176 --- From sbomify Insights: https://insights.sbomify.com/CVE-2025-49176/ Summaries are generated and may contain mistakes; the official description above is the record.