Linux Kernel: Integer Overflow (CVE-2026-80887)

What is affected, what to do

A flaw was found in the `drm/vmwgfx` component of the Linux kernel. An integer overflow vulnerability exists in the `vmw_shader_define()` function due to improper validation of user-supplied shader window size and offset.

Update Linux Kernel to version 6.6.151, Linux Kernel to version 6.12.103, Linux Kernel to version 6.18.44.

Affected

• Linux Kernel lt 6.4..6.6.151
• Linux Kernel lt 6.7..6.12.103
• Linux Kernel lt 6.13..6.18.44
• Linux Kernel lt 6.19..7.1.8

Fixed in

• Linux Kernel 6.6.151
• Linux Kernel 6.12.103
• Linux Kernel 6.18.44
• Linux Kernel 7.1.8
• Linux Kernel 7.2

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Metrics

Detection rules

No NEOSEC detection rule is available for this vulnerability yet.

Classification under NIS2 and CRA

Rule-based classification from exploitation status and severity. It does not replace a case-by-case assessment.

NIS2

NIS2 is EU Directive (EU) 2022/2555 to raise the level of cybersecurity across the Union. It substantially broadens obligations compared with the first NIS directive: more sectors, mandatory risk management, staged reporting duties and personal accountability of senior management.

Read in glossary

Handle the vulnerability in regular vulnerability handling under Art. 21(2)(e) NIS2.

CRA

The CRA is EU Regulation (EU) 2024/2847 setting horizontal cybersecurity requirements for „products with digital elements“ — from industrial controllers and software to connected consumer devices. For the first time manufacturers must ensure security across the entire product lifecycle, handle vulnerabilities and provide security updates.

Read in glossary

From 11.12.2027, Annex I Part II CRA requires manufacturers of affected products with digital elements to handle vulnerabilities without delay and provide security updates.

ISO/IEC 27001

ISO/IEC 27001 is the internationally leading standard for an information security management system (ISMS). It describes a risk-based, process-oriented framework to systematically plan, implement, review and improve information security.

Read in glossary

Control A.8.8, management of technical vulnerabilities: assess relevance to your systems, plan remediation and keep evidence.

Description

A flaw was found in the `drm/vmwgfx` component of the Linux kernel. An integer overflow vulnerability exists in the `vmw_shader_define()` function due to improper validation of user-supplied shader window size and offset. When the offset value is close to its maximum, an unsigned addition can wrap around, causing the size check to pass incorrectly. This allows an unbounded offset to be used, which could lead to memory corruption and potentially privilege escalation or denial of service.

Source: redhat_csaf, HKCERT (CC BY 3.0 HK) · HKCERT rating: medium, Ubuntu Security Notices, Debian LTS Advisories, suse_csaf, BSI WID Portal, BSI CSAF, cvelistv5, NVD (NIST), CVE.org (MITRE), ENISA EUVD, Microsoft Security Update Guide

Vendors and products

• Debian Linux-6.12
• Linux Linux
• Red Hat Openshift
• Ubuntu Ubuntu Linux
• Ubuntu Linux-aws
• Ubuntu Linux-aws-6.8
• Ubuntu Linux-aws-7.0
• Ubuntu Linux-aws-fips
• Ubuntu Linux-azure
• Ubuntu Linux-azure-6.8
• Ubuntu Linux-azure-fde
• Ubuntu Linux-azure-fde-6.8

References & sources

• git.kernel.orgstable/c/1bbe7751f5ebac383405ef29a66622d65bd505d3euvd
• git.kernel.orgstable/c/d3f44438aa805270aaead3b6840ccaea0f4c11f9euvd
• git.kernel.orgstable/c/cfd163169af3be56eaef113c680ea251f0d09189euvd
• git.kernel.orgstable/c/5c725901908eb1e52a16fc0e2373cb761df42d21euvd
• git.kernel.orgstable/c/54d56d5b42d2e4c72ba6e365e9774da90698aa22euvd

Changes to this CVE

Who changed this CVE and when: NVD (analysis, affected products, CVSS), the CVE publisher (CNA) and additional providers such as CISA (ADP).

1. 06.11.2026Record modifiedCISA ADP

   CISA assessment (SSVC): exploitation: none known, automatable: no

   Show the original change

   Individual changes of this event as published by NVD

   Type	Action	Before	After
   SSVC assessment	added	—	{"id":"CVE-2026-80887","role":"CISA Coordinator","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"partial"}],"version":"2.0.3","timestamp":"2026-11-06T17:04:20.331097Z"}

   Source identifier: 134c704f-9b21-4f2e-91b3-4a467353bcc0

2. 04.09.2026ReceivedLinux

   Description added or changed

   New references:

   • https://git.kernel.org/stable/c/1bbe7751f5ebac383405ef29a66622d65bd505d3
   • https://git.kernel.org/stable/c/54d56d5b42d2e4c72ba6e365e9774da90698aa22
   • https://git.kernel.org/stable/c/5c725901908eb1e52a16fc0e2373cb761df42d21
   • https://git.kernel.org/stable/c/cfd163169af3be56eaef113c680ea251f0d09189

   and 1 more reference

   Show 7 original changes

   Individual changes of this event as published by NVD

   Type	Action	Before	After
   Description	added	—	In the Linux kernel, the following vulnerability has been resolved: drm/vmwgfx: use check_add_overflow for shader size+offset bound vmw_shader_define() validates the user-supplied shader window against its backing buffer with (u64)buffer->tbo.base.size < (u64)size + (u64)offset drm_vmw_shader_create_arg::offset is __u64 in the uapi; when it is near U64_MAX the unsigned addition wraps and the resulting tiny value passes the check. The unbounded offset is then stored in res->guest_memory_offset and forwarded to host SVGA shader-create commands. Use check_add_overflow() to detect the wrap and compare the resulting endpoint against the buffer size.
   Affected versions (publisher)	added	—	New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/80xxx/CVE-2026-80887.json">CVE-2026-80887</a>
   Reference	added	—	https://git.kernel.org/stable/c/1bbe7751f5ebac383405ef29a66622d65bd505d3
   Reference	added	—	https://git.kernel.org/stable/c/54d56d5b42d2e4c72ba6e365e9774da90698aa22
   Reference	added	—	https://git.kernel.org/stable/c/5c725901908eb1e52a16fc0e2373cb761df42d21
   Reference	added	—	https://git.kernel.org/stable/c/cfd163169af3be56eaef113c680ea251f0d09189
   Reference	added	—	https://git.kernel.org/stable/c/d3f44438aa805270aaead3b6840ccaea0f4c11f9

   Source identifier: 416baaa9-dc9f-4396-8d5f-8c081fb06d67