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Fencer Vulns
no cvss —

CVE-2026-80887 json

drm/vmwgfx: use check_add_overflow for shader size+offset bound

published 2026-09-04 2 mo ago modified 2026-11-06 2 d ago also EUVD-2026-71637

cvss
—
not scored
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 6%
public exploits
0
none known

Summary

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.

Patch / fix

  • Linux Linux 6.6.151, 6.12.103, 6.18.44, 7.1.8, 7.2
  • linux Debian 13 6.12.105-1
  • linux Debian 14 7.1.8-1
  • linux-6.12 Debian 12 6.12.107-1~deb12u1

debian advisories DEBIAN-CVE-2026-80887

  • linux Ubuntu 26.04 LTS 7.0.0-42.42
  • linux-aws Ubuntu 26.04 LTS 7.0.0-1016.17
  • linux-gcp Ubuntu 26.04 LTS 7.0.0-1016.18
  • linux-ibm Ubuntu 26.04 LTS 7.0.0-1017.17
  • linux-riscv Ubuntu 26.04 LTS 7.0.0-42.42.1
  • linux-oracle Ubuntu 26.04 LTS 7.0.0-1015.16
  • linux-hwe-7.0 Ubuntu 24.04 LTS 7.0.0-42.42~24.04.1
  • linux-oem-7.0 Ubuntu 26.04 LTS 7.0.0-1017.17

ubuntu advisories UBUNTU-CVE-2026-80887

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • kernel RHEL 8 4.18.0-553.173.1.el8_10
  • perf RHEL 8 4.18.0-553.173.1.el8_10
  • bpftool RHEL 8 4.18.0-553.173.1.el8_10
  • kernel-core RHEL 8 4.18.0-553.173.1.el8_10
  • kernel-tools RHEL 8 4.18.0-553.173.1.el8_10
  • python3-perf RHEL 8 4.18.0-553.173.1.el8_10
  • kernel-modules RHEL 8 4.18.0-553.173.1.el8_10
  • kernel-zfcpdump RHEL 8 4.18.0-553.173.1.el8_10

red hat advisories RHSA-2026:82807RHSA-2026:82806RHSA-2026:81552

  • kernel-source Linux Micro 6.0 6.4.0-159998.55.1
  • kernel-default Linux Micro 6.0 6.4.0-159998.55.1
  • kernel-kvmsmall Linux Micro 6.0 6.4.0-159998.55.1
  • kernel-default-base Linux Micro 6.0 6.4.0-159998.55.1.159998.21.42
  • kernel-64kb SLE Module for Basesystem 15 SP7 6.4.0-150700.53.90.1
  • kernel-syms SLE Module for Development Tools 15 SP7 6.4.0-150700.53.90.1
  • kernel-azure SLE Module for Public Cloud 15 SP7 6.4.0-150700.53.90.1
  • kernel-source SLE Module for Development Tools 15 SP7, SLE Module for Basesystem 15 SP7 6.4.0-150700.53.90.1

suse advisories SUSE-SU-2026:24550-1SUSE-SU-2026:5091-1

  • kernel AlmaLinux 10 6.12.0-211.68.1.el10_2
  • rv AlmaLinux 10 6.12.0-211.68.1.el10_2
  • perf AlmaLinux 10 6.12.0-211.68.1.el10_2
  • rtla AlmaLinux 10 6.12.0-211.68.1.el10_2
  • libperf AlmaLinux 10 6.12.0-211.68.1.el10_2
  • kernel-rt AlmaLinux 10 6.12.0-211.68.1.el10_2
  • kernel-64k AlmaLinux 10 6.12.0-211.68.1.el10_2
  • kernel-core AlmaLinux 10 6.12.0-211.68.1.el10_2

almalinux advisories ALSA-2026:88477ALSA-2026:82806ALSA-2026:82807ALSA-2026:81552

  • kernel Rocky Linux 10 6.12.0-211.68.1.el10_2
  • kernel-rt Rocky Linux 8 4.18.0-553.173.1.rt7.514.el8_10
  • kernel Rocky Linux 8 4.18.0-553.173.1.el8_10
  • kernel Rocky Linux 9 5.14.0-687.57.1.el9_8

rocky linux advisories RLSA-2026:88477RLSA-2026:82806RLSA-2026:82807RLSA-2026:81552

  • kernel Azure Linux 3.0 6.6.152.1-1

azure linux advisories AZL-99603

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-80887 updated cvss 7.0

kernel: drm/vmwgfx: use check_add_overflow for shader size+offset bound

  • Red Hat OpenShift Container Platform 5 openshift/ose-rhel-coreos-9
    affected: workaround, no fix available
  • Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more
    under investigation
  • Red Hat Enterprise Linux kernel-modules-internal 6.12.0-211.68.1.el10_2
    fixed: vendor fix RHSA-2026:88477
  • Red Hat Enterprise Linux AppStream (v. 9) rv 5.14.0-687.57.1.el9_8, perf 5.14.0-687.57.1.el9_8, rtla 5.14.0-687.57.1.el9_8, python3-perf 5.14.0-687.57.1.el9_8, kernel-devel-matched 5.14.0-687.57.1.el9_8, kernel-64k-devel-matched 5.14.0-687.57.1.el9_8, +7 more
    fixed: vendor fix RHSA-2026:81552
  • Red Hat Enterprise Linux AppStream (v. 10) rv 6.12.0-211.68.1.el10_2, perf 6.12.0-211.68.1.el10_2, rtla 6.12.0-211.68.1.el10_2, python3-perf 6.12.0-211.68.1.el10_2, kernel-devel-matched 6.12.0-211.68.1.el10_2, kernel-64k-devel-matched 6.12.0-211.68.1.el10_2, +7 more
    fixed: vendor fix RHSA-2026:88477
  • Red Hat Enterprise Linux BaseOS (v. 8) perf 4.18.0-553.173.1.el8_10, kernel 4.18.0-553.173.1.el8_10, bpftool 4.18.0-553.173.1.el8_10, kernel-core 4.18.0-553.173.1.el8_10, kernel-tools 4.18.0-553.173.1.el8_10, python3-perf 4.18.0-553.173.1.el8_10, +15 more
    fixed: vendor fix RHSA-2026:82807
  • Red Hat Enterprise Linux BaseOS (v. 9) kernel 5.14.0-687.57.1.el9_8, kernel-64k 5.14.0-687.57.1.el9_8, kernel-core 5.14.0-687.57.1.el9_8, kernel-tools 5.14.0-687.57.1.el9_8, kernel-modules 5.14.0-687.57.1.el9_8, kernel-64k-core 5.14.0-687.57.1.el9_8, +27 more
    fixed: vendor fix RHSA-2026:81552
  • Red Hat Enterprise Linux BaseOS (v. 10) kernel 6.12.0-211.68.1.el10_2, kernel-64k 6.12.0-211.68.1.el10_2, kernel-core 6.12.0-211.68.1.el10_2, kernel-tools 6.12.0-211.68.1.el10_2, kernel-modules 6.12.0-211.68.1.el10_2, kernel-64k-core 6.12.0-211.68.1.el10_2, +28 more
    fixed: vendor fix RHSA-2026:88477
show 12 more
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) libperf 5.14.0-687.57.1.el9_8, kernel-debuginfo-common-s390x 5.14.0-687.57.1.el9_8, kernel-debuginfo-common-x86_64 5.14.0-687.57.1.el9_8, kernel-debuginfo-common-aarch64 5.14.0-687.57.1.el9_8, kernel-debuginfo-common-ppc64le 5.14.0-687.57.1.el9_8
    fixed: vendor fix RHSA-2026:81552
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) libperf 6.12.0-211.68.1.el10_2, kernel-debuginfo-common-s390x 6.12.0-211.68.1.el10_2, kernel-debuginfo-common-x86_64 6.12.0-211.68.1.el10_2, kernel-debuginfo-common-aarch64 6.12.0-211.68.1.el10_2, kernel-debuginfo-common-ppc64le 6.12.0-211.68.1.el10_2
    fixed: vendor fix RHSA-2026:88477
  • Red Hat Enterprise Linux CRB (v. 8) kernel-debuginfo-common-x86_64 4.18.0-553.173.1.el8_10, kernel-debuginfo-common-aarch64 4.18.0-553.173.1.el8_10, kernel-debuginfo-common-ppc64le 4.18.0-553.173.1.el8_10
    fixed: vendor fix RHSA-2026:82807
  • Red Hat Enterprise Linux Hidden (v. 10) kernel-modules-internal 6.12.0-211.68.1.el10_2, kernel-debuginfo-common-x86_64 6.12.0-211.68.1.el10_2
    fixed: vendor fix RHSA-2026:88477
  • Red Hat Enterprise Linux NFV (v. 8) kernel-rt 4.18.0-553.173.1.rt7.514.el8_10, kernel-rt-kvm 4.18.0-553.173.1.rt7.514.el8_10, kernel-rt-core 4.18.0-553.173.1.rt7.514.el8_10, kernel-rt-modules 4.18.0-553.173.1.rt7.514.el8_10, kernel-rt-debug-kvm 4.18.0-553.173.1.rt7.514.el8_10, kernel-rt-debug-core 4.18.0-553.173.1.rt7.514.el8_10, +4 more
    fixed: vendor fix RHSA-2026:82806
  • Red Hat Enterprise Linux Real Time (v. 9) kernel-rt 5.14.0-687.57.1.el9_8, kernel-rt-64k 5.14.0-687.57.1.el9_8, kernel-rt-core 5.14.0-687.57.1.el9_8, kernel-rt-modules 5.14.0-687.57.1.el9_8, kernel-rt-64k-core 5.14.0-687.57.1.el9_8, kernel-rt-debug-core 5.14.0-687.57.1.el9_8, +14 more
    fixed: vendor fix RHSA-2026:81552
  • Red Hat Enterprise Linux Real Time (v. 10) kernel-rt 6.12.0-211.68.1.el10_2, kernel-rt-64k 6.12.0-211.68.1.el10_2, kernel-rt-core 6.12.0-211.68.1.el10_2, kernel-rt-modules 6.12.0-211.68.1.el10_2, kernel-rt-64k-core 6.12.0-211.68.1.el10_2, kernel-rt-debug-core 6.12.0-211.68.1.el10_2, +14 more
    fixed: vendor fix RHSA-2026:88477
  • Red Hat Enterprise Linux Real Time for NFV (v. 9) kernel-rt 5.14.0-687.57.1.el9_8, kernel-rt-core 5.14.0-687.57.1.el9_8, kernel-rt-modules 5.14.0-687.57.1.el9_8, kernel-rt-debug-core 5.14.0-687.57.1.el9_8, kernel-rt-modules-core 5.14.0-687.57.1.el9_8, kernel-rt-debug-modules 5.14.0-687.57.1.el9_8, +4 more
    fixed: vendor fix RHSA-2026:81552
  • Red Hat Enterprise Linux Real Time for NFV (v. 10) kernel-rt 6.12.0-211.68.1.el10_2, kernel-rt-core 6.12.0-211.68.1.el10_2, kernel-rt-modules 6.12.0-211.68.1.el10_2, kernel-rt-debug-core 6.12.0-211.68.1.el10_2, kernel-rt-modules-core 6.12.0-211.68.1.el10_2, kernel-rt-debug-modules 6.12.0-211.68.1.el10_2, +4 more
    fixed: vendor fix RHSA-2026:88477
  • Red Hat Enterprise Linux RT (v. 8) kernel-rt 4.18.0-553.173.1.rt7.514.el8_10, kernel-rt-core 4.18.0-553.173.1.rt7.514.el8_10, kernel-rt-modules 4.18.0-553.173.1.rt7.514.el8_10, kernel-rt-debug-core 4.18.0-553.173.1.rt7.514.el8_10, kernel-rt-debug-modules 4.18.0-553.173.1.rt7.514.el8_10, kernel-rt-modules-extra 4.18.0-553.173.1.rt7.514.el8_10, +2 more
    fixed: vendor fix RHSA-2026:82806
  • Red Hat OpenShift Container Platform 4.22 rhcos 4.22.9.8.202610241758
    fixed: vendor fix RHSA-2026:89197
  • Red Hat Enterprise Linux 7 perf, kernel, bpftool, kernel-rt, python-perf, kernel-kdump, +8 more Red Hat Enterprise Linux 9 kernel-rt, kernel-rt-kvm, kernel-rt-core, kernel-rt-modules, kernel-rt-debug-kvm, kernel-rt-debug-core, +12 more Red Hat OpenShift Container Platform 4 openshift/ose-rhel-coreos-8
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
2 d ago

Exploit prediction

0.17% chance of exploitation in the next 30 days, higher than 6% of all scored CVEs (FIRST EPSS, 2026-11-08).

Affected products

  • Linux Linux

Classification

Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.