CVE-2026-98492
kernel: net: macb: fix dma_alloc_coherent() leak on macb_alloc() error paths
Severity
LowRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · October 18, 2026
Updated · October 21, 2026
Description
A flaw was found in the Linux kernel's Cadence MACB network driver. During network buffer allocation, the driver's error-handling routines fail to properly release allocated Direct Memory Access (DMA) memory buffers when a failure occurs. A local user could trigger these error conditions during device initialization or interface setup, causing kernel memory to leak. Over time, this unreleased memory can result in system resource exhaustion and a Denial of Service (DoS).
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 · 1.9CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:L
CWE-772 · Missing Release of Resource after Effective Lifetime