Linux Kernel up to 6.12.80/6.18.21/6.19.11 Compression line_time_us privilege escalation

CVSS Meta Temp Score
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CTI Interest Score
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5.3$0-$5k0.00

Summaryinfo

A vulnerability was found in Linux Kernel up to 6.12.80/6.18.21/6.19.11. It has been declared as critical. This affects the function line_time_us of the component Compression Handler. Such manipulation leads to an unknown weakness. This vulnerability is uniquely identified as CVE-2026-31767. No exploit exists. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Linux Kernel up to 6.12.80/6.18.21/6.19.11. Affected by this issue is the function line_time_us of the component Compression Handler. The impact remains unknown. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: drm/i915/dsi: Don't do DSC horizontal timing adjustments in command mode Stop adjusting the horizontal timing values based on the compression ratio in command mode. Bspec seems to be telling us to do this only in video mode, and this is also how the Windows driver does things. This should also fix a div-by-zero on some machines because the adjusted htotal ends up being so small that we end up with line_time_us==0 when trying to determine the vtotal value in command mode. Note that this doesn't actually make the display on the Huawei Matebook E work, but at least the kernel no longer explodes when the driver loads. (cherry picked from commit 0b475e91ecc2313207196c6d7fd5c53e1a878525)

The advisory is shared for download at git.kernel.org. This vulnerability is handled as CVE-2026-31767 since 03/09/2026. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 06/27/2026).

The vulnerability scanner Nessus provides a plugin with the ID 323086 (SUSE SLED15: cluster-md-kmp-default / dlm-kmp-default / gfs2-kmp-default / etc (SUSE-SU-2026:2482-1)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.12.81, 6.18.22 or 6.19.12 eliminates this vulnerability. Applying the patch 55efe8402f46af8399c8b634a18b130a05fd7820/86e926b108880c0109b8635e459450447156aeb7/33b5336e4fd8ba0e40a12989cadb3f5534a0f9e4/4dfce79e098915d8e5fc2b9e1d980bc3251dd32c is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at Tenable (323086). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.5
VulDB Meta Temp Score: 5.3

VulDB Base Score: 5.5
VulDB Temp Score: 5.3
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: Privilege escalation
CWE: Unknown
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 323086
Nessus Name: SUSE SLED15: cluster-md-kmp-default / dlm-kmp-default / gfs2-kmp-default / etc (SUSE-SU-2026:2482-1)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 6.12.81/6.18.22/6.19.12
Patch: 55efe8402f46af8399c8b634a18b130a05fd7820/86e926b108880c0109b8635e459450447156aeb7/33b5336e4fd8ba0e40a12989cadb3f5534a0f9e4/4dfce79e098915d8e5fc2b9e1d980bc3251dd32c

Timelineinfo

03/09/2026 CVE reserved
05/01/2026 +52 days Advisory disclosed
05/01/2026 +0 days VulDB entry created
06/27/2026 +57 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-31767 (🔒)
GCVE (CVE): GCVE-0-2026-31767
GCVE (VulDB): GCVE-100-360632

Entryinfo

Created: 05/01/2026 17:39
Updated: 06/27/2026 15:10
Changes: 05/01/2026 17:39 (58), 06/27/2026 15:10 (2)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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