Use of uninitialized resource in Linux kernel - CVE-2026-43039
Published: May 2, 2026
Vulnerability identifier: #VU128866
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-43039
CWE-ID: CWE-908
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local attacker to disclose sensitive information.
The vulnerability exists due to uninitialized memory exposure in emac_dispatch_skb_zc() when processing zero-copy receive packets. A local attacker can trigger packet reception to disclose sensitive information.
How to mitigate CVE-2026-43039
Install security update from vendor's repository.