Out-of-bounds write in Linux kernel - CVE-2026-98940
Published: October 23, 2026
Vulnerability identifier: #VU157577
CSH Severity: Low
CVSS v4: 6.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-98940
CWE-ID: CWE-787
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local privileged user to potentially cause a denial of service through kernel memory corruption.
The vulnerability exists due to an out-of-bounds write in the Qualcomm LPASS CPU driver's asoc_qcom_lpass_cpu_platform_probe() function when configuring playback channel constraints for a DAI using LPAIF_I2SCTL_MODE_QUAD01 on platforms with sparse DAI IDs. A local privileged user can trigger the affected probe path to cause a hardware port ID to be used as a DAI driver table index, potentially corrupting kernel memory and causing a denial of service.
Affected software
Linux kernel
How to mitigate CVE-2026-98940
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3
External References
- https://git.kernel.org/stable/c/6833f1893ac2ec40016c348779af63debf3700d2
- https://git.kernel.org/stable/c/69d2b7a4c115181629eb14d800aecc3e7de3f7fb
- https://git.kernel.org/stable/c/775df6a27e8433e2414124472938009b958f9a77
- https://git.kernel.org/stable/c/ca51771c8efde5df05476ac98dd1b2af4e2b149f
- https://git.kernel.org/stable/c/f11336e6d3cd9e28e5cdf1cb8a6171e7c3eff4e4