Out-of-bounds read in Linux kernel - CVE-2026-31614
Published: April 25, 2026
Vulnerability identifier: #VU127786
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-31614
CWE-ID: CWE-125
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a remote attacker to disclose sensitive information.
The vulnerability exists due to an out-of-bounds read in check_wsl_eas() when processing extended attribute data from an SMB server response. A remote attacker can send a specially crafted server response to disclose sensitive information.
The issue can leak up to 8 bytes of kernel heap memory and can influence which WSL xattr the data is interpreted as.
How to mitigate CVE-2026-31614
Install security update from vendor's repository.