CVE-2026-46179
Analyzed Analyzed - Analysis Complete
Pointer Operations Bypass in Linux Kernel ASoC SOF

Publication date: 2026-05-28

Last updated on: 2026-06-11

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: ASoC: SOF: Don't allow pointer operations on unconfigured streams When reporting the pointer for a compressed stream we report the current I/O frame position by dividing the position by the number of channels multiplied by the number of container bytes. These values default to 0 and are only configured as part of setting the stream parameters so this allows a divide by zero to be configured. Validate that they are non zero, returning an error if not
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Meta Information
Published
2026-05-28
Last Modified
2026-06-11
Generated
2026-06-17
AI Q&A
2026-05-28
EPSS Evaluated
2026-06-16
NVD
CVE-2026-46179
EUVD
EUVD-2026-32806
Affected Vendors & Products
Showing 5 associated CPEs
Vendor Product Version / Range
linux linux_kernel From 6.13 (inc) to 6.18.30 (exc)
linux linux_kernel From 6.19 (inc) to 7.0.7 (exc)
linux linux_kernel From 6.7 (inc) to 6.12.88 (exc)
linux linux_kernel From 6.2 (inc) to 6.6.140 (exc)
linux linux_kernel From 6.1 (inc) to 6.1.175 (exc)
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Exploitability
CWE
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CWE ID Description
CWE-UNKNOWN
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Executive Summary

This vulnerability exists in the Linux kernel's ASoC (ALSA System on Chip) SOF (Sound Open Firmware) component. It involves pointer operations on unconfigured compressed audio streams. Specifically, when reporting the pointer for a compressed stream, the current I/O frame position is calculated by dividing the position by the product of the number of channels and the number of container bytes. These values default to zero and are only set when stream parameters are configured. If these values remain zero, a divide-by-zero error can occur. The vulnerability was fixed by validating that these values are non-zero and returning an error if they are not.

Mitigation Strategies

The vulnerability has been resolved in the Linux kernel by validating that the number of channels and container bytes are non-zero when reporting the pointer for a compressed stream, preventing a divide-by-zero error.

To mitigate this vulnerability, you should update your Linux kernel to the latest version that includes this fix.

Impact Analysis

This vulnerability can lead to a divide-by-zero error in the Linux kernel's audio subsystem when handling compressed streams that are not properly configured. Such an error could potentially cause a kernel crash or instability, affecting system reliability and availability.

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