Linux Kernel up to 6.17.2 bytcr_rt5640 privilege escalation

CVSS Meta Temp Score
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Current Exploit Price (≈)
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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 6.17.2. It has been classified as problematic. This affects the function bytcr_rt5640. Performing a manipulation results in an unknown weakness. This vulnerability is cataloged as CVE-2025-40154. There is no exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in Linux Kernel up to 6.17.2. It has been classified as problematic. The impact remains unknown. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: ASoC: Intel: bytcr_rt5640: Fix invalid quirk input mapping When an invalid value is passed via quirk option, currently bytcr_rt5640 driver only shows an error message but leaves as is. This may lead to unepxected results like OOB access. This patch corrects the input mapping to the certain default value if an invalid value is passed.

The advisory is shared at git.kernel.org. This vulnerability is uniquely identified as CVE-2025-40154 since 04/16/2025. 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 02/08/2026).

The vulnerability scanner Nessus provides a plugin with the ID 276782 (Debian dla-4379 : linux-config-6.1 - security update), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 5.4.301, 5.10.246, 5.15.195, 6.1.156, 6.6.112, 6.12.53, 6.17.3 or 6.18-rc1 eliminates this vulnerability. Applying the patch 2c27e047bdcba457ec953f7e90e4ed6d5f8aeb01/a97b4d18ecb012c5624cdf2cab2ce5e1312fdd5d/dea9c8c9028c9374761224a7f9d824e845a2aa2e/f58fca15f3bf8b982e799c31e4afa8923788aa40/29a41bf6422688f0c5a09b18222e1a64b2629fa4/5c03ea2ef4ebba75c69c90929d8590eb3d3797a9/48880f3cdf2b6d8dcd91219c5b5c8a7526411322/fba404e4b4af4f4f747bb0e41e9fff7d03c7bcc0 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 databases at Tenable (276782) and CERT Bund (WID-SEC-2025-2579). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Affected

  • Google Container-Optimized OS
  • Debian Linux
  • Amazon Linux 2
  • Red Hat Enterprise Linux
  • Ubuntu Linux
  • SUSE Linux
  • Oracle Linux
  • SUSE openSUSE
  • Open Source Linux Kernel
  • RESF Rocky Linux

Productinfo

Type

Vendor

Name

Version

License

Website

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: 276782
Nessus Name: Debian dla-4379 : linux-config-6.1 - security update

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 5.4.301/5.10.246/5.15.195/6.1.156/6.6.112/6.12.53/6.17.3/6.18-rc1
Patch: 2c27e047bdcba457ec953f7e90e4ed6d5f8aeb01/a97b4d18ecb012c5624cdf2cab2ce5e1312fdd5d/dea9c8c9028c9374761224a7f9d824e845a2aa2e/f58fca15f3bf8b982e799c31e4afa8923788aa40/29a41bf6422688f0c5a09b18222e1a64b2629fa4/5c03ea2ef4ebba75c69c90929d8590eb3d3797a9/48880f3cdf2b6d8dcd91219c5b5c8a7526411322/fba404e4b4af4f4f747bb0e41e9fff7d03c7bcc0

Timelineinfo

04/16/2025 CVE reserved
11/12/2025 +210 days Advisory disclosed
11/12/2025 +0 days VulDB entry created
02/08/2026 +88 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2025-40154 (🔒)
GCVE (CVE): GCVE-0-2025-40154
GCVE (VulDB): GCVE-100-332169
CERT Bund: WID-SEC-2025-2579 - Linux Kernel: Mehrere Schwachstellen

Entryinfo

Created: 11/12/2025 13:35
Updated: 02/08/2026 06:47
Changes: 11/12/2025 13:35 (56), 11/28/2025 21:48 (2), 12/21/2025 02:51 (7), 12/30/2025 21:22 (1), 02/08/2026 06:47 (1)
Complete: 🔍
Cache ID: 216::103

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

Discussion

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