CVE-2026-43092
kernel: xsk: validate MTU against usable frame size on bind
Severity
LowRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · May 6, 2026
Updated · July 3, 2026
Description
A flaw was found in the Linux kernel's AF_XDP (eXpress Data Path) subsystem. The AF_XDP bind operation fails to validate the Maximum Transmission Unit (MTU) against the usable frame space provided by the UMEM (User Memory) chunk. This can lead to situations where the configured MTU does not fit, potentially causing network communication failures or system instability. A local attacker could potentially leverage this vulnerability to disrupt network services, resulting in a denial of service.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-1284 · Improper Validation of Specified Quantity in Input