Linux Kernel up to 7.2-rc1 HDCP intel_hdcp.c streams buffer overflow

CVSS Meta Temp Score
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CTI Interest Score
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8.7$5k-$25k0.00

Summaryinfo

A vulnerability was found in Linux Kernel up to 6.6.150/6.12.102/6.18.41/7.1.5/7.2-rc1. It has been rated as very critical. The impacted element is an unknown function of the file drivers/gpu/drm/i915/intel_hdcp.c of the component HDCP. This manipulation of the argument streams causes buffer overflow. This vulnerability is registered as CVE-2026-68253. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability has been found in Linux Kernel up to 6.6.150/6.12.102/6.18.41/7.1.5/7.2-rc1 and classified as very critical. Affected by this vulnerability is an unknown function of the file drivers/gpu/drm/i915/intel_hdcp.c of the component HDCP. The manipulation of the argument streams with an unknown input leads to a buffer overflow vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: drm/i915/hdcp: check streams[] bounds before overflow The data->streams[] overflow check is done after the buffer overflow has already happened. Move the overflow check before the write. Side note, emitting a warning splat with a backtrace might be overkill here, but prefer not changing the behaviour other than not doing the overrun. Discovered using AI-assisted static analysis confirmed by Intel Product Security. (cherry picked from commit 9284ab3b6e776c315883ac2611283d263c9460fd)

The advisory is shared at git.kernel.org. This vulnerability is known as CVE-2026-68253 since 07/30/2026. The exploitation appears to be easy. The attack can be launched remotely. Technical details are known, but no exploit is available. The price for an exploit might be around USD $5k-$25k 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 6.6.151, 6.12.103, 6.18.42, 7.1.6 or 7.2-rc2 eliminates this vulnerability. Applying the patch 84351f12390349ba010920fc247e1a0b12e41eb3/2106fb490b2c6003e23ad6ff36ce823a2170e138/3d2ef8d389495e7889c6062d8bddc46d2a5fbdef/984085c5b53572e2e03fd5fc4817e86ef1effc6e/bbb15a6b042d02e5508a02b4847e02d2579ee7bc is able to eliminate this problem.

The vulnerability is also documented in the vulnerability database at Tenable (339550). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.9
VulDB Meta Temp Score: 8.7

VulDB Base Score: 9.9
VulDB Temp Score: 9.5
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 7.8
CNA Vector (Linux): 🔒

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: Yes

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 6.6.151/6.12.103/6.18.42/7.1.6/7.2-rc2
Patch: 84351f12390349ba010920fc247e1a0b12e41eb3/2106fb490b2c6003e23ad6ff36ce823a2170e138/3d2ef8d389495e7889c6062d8bddc46d2a5fbdef/984085c5b53572e2e03fd5fc4817e86ef1effc6e/bbb15a6b042d02e5508a02b4847e02d2579ee7bc

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-2026-68253 (🔒)
GCVE (CVE): GCVE-0-2026-68253
GCVE (VulDB): GCVE-100-387625

Entryinfo

Created: 08/10/2026 16:52
Updated: 08/26/2026 08:51
Changes: 08/10/2026 16:52 (60), 08/23/2026 16:44 (11), 08/26/2026 08:51 (2)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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