CVE-2026-46237

Kernel memory disclosure via bounds-check overflow

Published May 28, 2026 · Updated May 28, 2026

Integer overflow in the AMDGPU VCN3 decoder in Linux Kernel allows local users to read kernel memory or crash the kernel. The vcn_v3_0_dec_msg function adds 32-bit offset and size fields before checking the sum against the buffer-object boundary, allowing wraparound to bypass the check. Access to an AMDGPU render node is required; the Linux CNA later rejected this identifier without publishing a specific rejection reason.

CVSS severity7.1
High
EPSS probabilityUnavailable
No score available in this record
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

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Summary

What happened

Integer overflow in the AMDGPU VCN3 decoder in Linux Kernel allows local users to read kernel memory or crash the kernel. The vcn_v3_0_dec_msg function adds 32-bit offset and size fields before checking the sum against the buffer-object boundary, allowing wraparound to bypass the check. Access to an AMDGPU render node is required; the Linux CNA later rejected this identifier without publishing a specific rejection reason.

The record

CVE
CVE-2026-46237
Published
May 28, 2026
Updated
May 28, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
T1005
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. May 28, 2026CVE publishedPublication date reported by the CVE source.
  2. May 28, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=638d3e0b9eb77aa53fdd60e2b928761d16ba76fa <1936310f68c54be961de38ac539cef9b543207cb
  2. Affected versionversion=638e48ee39d0f2af9336f917a6f5d6692dd64d93 <016b64a0313ea5346cf526e30c8d3e66aca10175
  3. Affected versionversion=7.1-rc1
  4. Affected versionversion=870c8738c3774336baedddd0240951d078a703b8 <e8124121b79ab5d32fa8fbbd101f7208eca9cd7d
  5. Affected versionversion=b193019860d61e92da395eae2011f2f6716b182f <e6e9faba8100628990cccd13f0f044a648c303cf
  6. Affected versionversion=e382e0b81a3e7bd21504fee1d01ae8b08f84d3a7 <2e43b66fceacd6e982b94f2e3f8b34edd7463396

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linux Kernelversion=638d3e0b9eb77aa53fdd60e2b928761d16ba76fa <1936310f68c54be961de38ac539cef9b543207cb; version=638e48ee39d0f2af9336f917a6f5d6692dd64d93 <016b64a0313ea5346cf526e30c8d3e66aca10175; version=7.1-rc1; version=870c8738c3774336baedddd0240951d078a703b8 <e8124121b79ab5d32fa8fbbd101f7208eca9cd7d; version=b193019860d61e92da395eae2011f2f6716b182f <e6e9faba8100628990cccd13f0f044a648c303cf; version=e382e0b81a3e7bd21504fee1d01ae8b08f84d3a7 <2e43b66fceacd6e982b94f2e3f8b34edd7463396

Published CVSS scores

7.1Linux CNACVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1005Data from Local System

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

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Your stack

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