#VU124892 Out-of-bounds write in Linux kernel - CVE-2026-31395
Published: April 6, 2026
Vulnerability identifier: #VU124892
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-31395
CWE-ID: CWE-787
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerable software:
Linux kernel
Linux kernel
Software vendor:
Linux Foundation
Linux Foundation
Description
The vulnerability allows a local attacker to cause a denial of service or corrupt kernel memory.
The vulnerability exists due to an out-of-bounds write in bnxt_async_event_process() when processing the ASYNC_EVENT_CMPL_EVENT_ID_DBG_BUF_PRODUCER async event. A local attacker can use a malicious or compromised NIC that supplies a crafted type value to trigger an out-of-bounds access and corrupt kernel memory or cause a crash.
The issue occurs because a firmware-supplied 16-bit type field from DMA-mapped completion ring memory is used directly as an index into bp->bs_trace[] without bounds validation.
Remediation
Install security update from vendor's repository.