CVE-2026-46312

Local service interruption via missing VMA flags

Published Jun 8, 2026 · Updated Jun 8, 2026

Denial of service in the Linux kernel allows local users to trigger a kernel warning by mapping an imported DMA buffer through videobuf2. The vb2_dma_sg_mmap function omits VM_DONTEXPAND and VM_DONTDUMP from the new VMA, so a later DRM GEM mapping reaches a warning that can panic the host. Exploitation requires local low-privilege access, an imported buffer handled through vb2_dma_sg_memops, and warning-to-panic behavior for a system crash.

CVSS severity5.5
Medium
EPSS probability0.11%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Denial of service in the Linux kernel allows local users to trigger a kernel warning by mapping an imported DMA buffer through videobuf2. The vb2_dma_sg_mmap function omits VM_DONTEXPAND and VM_DONTDUMP from the new VMA, so a later DRM GEM mapping reaches a warning that can panic the host. Exploitation requires local low-privilege access, an imported buffer handled through vb2_dma_sg_memops, and warning-to-panic behavior for a system crash.

The record

CVE
CVE-2026-46312
Published
Jun 8, 2026
Updated
Jun 8, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 8, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 8, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=2.6.39
  2. Affected versionversion=5ba3f757f0592ca001266b4a6214d0332349909c <1a1360264f699521e001e7739009ee3ee3c6a4f5
  3. Affected versionversion=5ba3f757f0592ca001266b4a6214d0332349909c <21fade52ab9fb13368a5709e60b0d9909197aeae
  4. Affected versionversion=5ba3f757f0592ca001266b4a6214d0332349909c <7254b31a13aaa0c2c0f9ffbc335b718656117ff4
  5. Affected versionversion=5ba3f757f0592ca001266b4a6214d0332349909c <b4cf91658a636618f1437beec971dec25dec28eb
  6. Affected versionversion=5ba3f757f0592ca001266b4a6214d0332349909c <feb17524aa4ec337749344be0db52b88663e25ab

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=2.6.39; version=5ba3f757f0592ca001266b4a6214d0332349909c <1a1360264f699521e001e7739009ee3ee3c6a4f5; version=5ba3f757f0592ca001266b4a6214d0332349909c <21fade52ab9fb13368a5709e60b0d9909197aeae; version=5ba3f757f0592ca001266b4a6214d0332349909c <7254b31a13aaa0c2c0f9ffbc335b718656117ff4; version=5ba3f757f0592ca001266b4a6214d0332349909c <b4cf91658a636618f1437beec971dec25dec28eb; version=5ba3f757f0592ca001266b4a6214d0332349909c <feb17524aa4ec337749344be0db52b88663e25ab

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo