Linux Kernel up to 6.12.102/6.18.41/7.1.5 Cleaner Shader drm/amdgpu/gfx buffer overflow

CVSS Meta Temp Score
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CTI Interest Score
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8.4$0-$5k0.00

Summaryinfo

A vulnerability has been found in Linux Kernel up to 6.12.102/6.18.41/7.1.5 and classified as very critical. Affected by this issue is some unknown functionality of the file drm/amdgpu/gfx of the component Cleaner Shader. Performing a manipulation results in buffer overflow. This vulnerability was named CVE-2026-68276. The attack needs to be approached locally. There is no available exploit.

Detailsinfo

A vulnerability was found in Linux Kernel up to 6.12.102/6.18.41/7.1.5. It has been classified as very critical. This affects an unknown part of the file drm/amdgpu/gfx of the component Cleaner Shader. The manipulation with an unknown input leads to a buffer overflow vulnerability. CWE is classifying the issue as CWE-120. The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu/gfx: fix cleaner shader IB buffer overflow The cleaner shader sysfs path allocates a 16-dword (64 byte) IB but incorrectly fills (align_mask + 1) dwords. On GFX rings align_mask is 0xff, so the loop wrote 256 dwords into a 64-byte buffer, causing a kernel page fault. The IB only needs to be a minimal NOP shell to schedule the job; the cleaner shader itself is emitted on the ring via emit_cleaner_shader(). Fill 16 dwords to match the allocation. v2: Use ib_size_dw variable (Lijo) (cherry picked from commit bf21af331ebf72d0935fd70c73192414a422c03a)

It is possible to read the advisory at git.kernel.org. This vulnerability is uniquely identified as CVE-2026-68276 since 07/30/2026. The exploitability is told to be easy. Attacking locally is a requirement. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 08/26/2026).

The vulnerability scanner Nessus provides a plugin with the ID 339550 (Debian dsa-6466 : ata-modules-6.12.101+deb13-armmp-di - security update), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.12.103, 6.18.42, 7.1.6 or 7.2-rc1 eliminates this vulnerability. Applying the patch 201633f47b542a99bb7baafdfcda7781249fb3d9/e28420e36542ae8b66a5bdcec419525f521bddf8/9cd9a983769a4d0e9cc80a287316ee79685d38b3/3e864bf2a32a1cbdf1e0f9c5a5a4176e8575f4a3 is able to eliminate this problem.

The vulnerability is also documented in the vulnerability database at Tenable (339550). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.8
VulDB Meta Temp Score: 8.4

VulDB Base Score: 8.8
VulDB Temp Score: 8.4
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Buffer overflow
CWE: CWE-120 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: No

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 339550
Nessus Name: Debian dsa-6466 : ata-modules-6.12.101+deb13-armmp-di - security update

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 6.12.103/6.18.42/7.1.6/7.2-rc1
Patch: 201633f47b542a99bb7baafdfcda7781249fb3d9/e28420e36542ae8b66a5bdcec419525f521bddf8/9cd9a983769a4d0e9cc80a287316ee79685d38b3/3e864bf2a32a1cbdf1e0f9c5a5a4176e8575f4a3

Timelineinfo

07/30/2026 CVE reserved
08/10/2026 +11 days Advisory disclosed
08/10/2026 +0 days VulDB entry created
08/26/2026 +16 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-68276 (🔒)
GCVE (CVE): GCVE-0-2026-68276
GCVE (VulDB): GCVE-100-387663

Entryinfo

Created: 08/10/2026 17:20
Updated: 08/26/2026 12:46
Changes: 08/10/2026 17:20 (59), 08/26/2026 12:46 (2)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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