--- title: "CVE-2026-89804: Linux Kernel - Resource Leak" description: "Linux kernel contains a mismatched DMA unmap size vulnerability in drm/nouveau/dmem caused by incorrect unmap size for large folios, letting attackers cause resource leaks, exploit requires kernel-level access." url: https://panop.io/threat-heartbeat/CVE-2026-89804/ --- # CVE-2026-89804 Linux Kernel - Resource Leak Linux kernel contains a mismatched DMA unmap size vulnerability in drm/nouveau/dmem caused by incorrect unmap size for large folios, letting attackers cause resource leaks, exploit requires kernel-level access. CVSS base score 8.8 /10 High CISA KEV Not listed Public exploit None known Authentication Required EPSS 0.17% chance of exploitation in 30 days [View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-89804) ## Details Type Resource Leak Impact Denial Of Service CVSS vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H Published 16 September 2026 Updated 15 October 2026 ## Vendor fix Update to the latest Linux kernel version containing the fix. Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them. ## References - [https://nvd.nist.gov/vuln/detail/CVE-2026-89804](https://nvd.nist.gov/vuln/detail/CVE-2026-89804) - [https://git.kernel.org/stable/c/4deb29b9d33bfdb3de4d2d9944947ecf77221e42](https://git.kernel.org/stable/c/4deb29b9d33bfdb3de4d2d9944947ecf77221e42) - [https://git.kernel.org/stable/c/caa1bc2a0a6ca19dcb90bbf88208b0fe2decd66f](https://git.kernel.org/stable/c/caa1bc2a0a6ca19dcb90bbf88208b0fe2decd66f) [← All CVEs](https://panop.io/threat-heartbeat/) ## What this record can't tell you - Whether you run the affected software, and where - Whether an attacker can actually reach and exploit it - The misconfigurations that never get a CVE number - What it would cost the business, ranked into what to fix first Panop answers these inside your environment, for this CVE and every other finding. [Book a demo](https://panop.io/demo)