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Vulnerability record · CVE-2026-23078 · published 4 February 2026

CVE-2026-23078: Linux kernel out-of-bounds write vulnerability

Linux · Linux Kernel

In the Linux kernel, the following vulnerability has been resolved: ALSA: scarlett2: Fix buffer overflow in config retrieval The scarlett2_usb_get_config() function has a logic error in the endianness conversion code that can cause buffer overflows when count > 1. The code checks `if (size == 2)` where `size` is the total buffer size in bytes, then loops `count` times treating each element as u16 (2 bytes). This causes the loop to access `count * 2` bytes when the buffer only has `size` bytes allocated. Fix by checking the element size (config_item->size) instead of the total buffer size. This ensures the endianness conversion matches the actual element type.

7.8 CVSS 3.1 High EPSS 0.15% · top 96.3% CWE-787 · Out-of-bounds write
7.8CVSS 3.1 base score
0.15%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
6References
17 Jun 2026Last modified by NVD

Description

In the Linux kernel, the following vulnerability has been resolved: ALSA: scarlett2: Fix buffer overflow in config retrieval The scarlett2_usb_get_config() function has a logic error in the endianness conversion code that can cause buffer overflows when count > 1. The code checks `if (size == 2)` where `size` is the total buffer size in bytes, then loops `count` times treating each element as u16 (2 bytes). This causes the loop to access `count * 2` bytes when the buffer only has `size` bytes allocated. Fix by checking the element size (config_item->size) instead of the total buffer size. This ensures the endianness conversion matches the actual element type.

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://git.kernel.org/stable/c/27049f50be9f5ae3a62d272128ce0b381cb26a24 Patch
https://git.kernel.org/stable/c/31a3eba5c265a763260976674a22851e83128f6d Patch
https://git.kernel.org/stable/c/51049f6e3f05d70660e2458ad3bb302a3721b751 Patch
https://git.kernel.org/stable/c/6f5c69f72e50d51be3a8c028ae7eda42c82902cb Patch
https://git.kernel.org/stable/c/91a756d22f0482eac5bedb113c8922f90b254449 Patch
https://git.kernel.org/stable/c/d5e80d1f97ae55bcea1426f551e4419245b41b9c Patch

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Source: NIST National Vulnerability Database (record CVE-2026-23078), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.