Linux Kernel up to 6.19.11 Ctxfi Driver daio_device_index privilege escalation

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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4.4$0-$5k0.00

Summaryinfo

A vulnerability classified as critical has been found in Linux Kernel up to 6.19.11. This affects the function daio_device_index of the component Ctxfi Driver. Performing a manipulation results in an unknown weakness. This vulnerability is identified as CVE-2026-31777. There is not any exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in Linux Kernel up to 6.19.11. It has been classified as critical. This affects the function daio_device_index of the component Ctxfi Driver. The impact remains unknown. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: ALSA: ctxfi: Check the error for index mapping The ctxfi driver blindly assumed a proper value returned from daio_device_index(), but it's not always true. Add a proper error check to deal with the error from the function.

The advisory is shared at git.kernel.org. This vulnerability is uniquely identified as CVE-2026-31777 since 03/09/2026. The exploitability is told to be difficult. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 05/03/2026).

Upgrading to version 6.19.12 eliminates this vulnerability. Applying the patch d4d3b8cbb70a2de247cbfe99bdb232aef9ed59bc/277c6960d4ddb94d16198afd70c92c3d4593d131 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 EUVD (EUVD-2026-26590). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

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Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.6
VulDB Meta Temp Score: 4.4

VulDB Base Score: 4.6
VulDB Temp Score: 4.4
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

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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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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 6.19.12
Patch: d4d3b8cbb70a2de247cbfe99bdb232aef9ed59bc/277c6960d4ddb94d16198afd70c92c3d4593d131

Timelineinfo

03/09/2026 CVE reserved
05/01/2026 +52 days Advisory disclosed
05/01/2026 +0 days VulDB entry created
05/03/2026 +2 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-31777 (🔒)
GCVE (CVE): GCVE-0-2026-31777
GCVE (VulDB): GCVE-100-360681
EUVD: 🔒

Entryinfo

Created: 05/01/2026 17:56
Updated: 05/03/2026 04:01
Changes: 05/01/2026 17:56 (58), 05/03/2026 04:01 (1)
Complete: 🔍
Cache ID: 216::103

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

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