CVE-2026-98131
kernel: net: stmmac: fix dma mapping leak in stmmac_tso_xmit()
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · September 25, 2026
Updated · October 9, 2026
Description
A flaw was found in the Linux kernel's stmmac network driver. During network packet transmission, a failure in Direct Memory Access (DMA) mapping for packet fragments causes the driver to drop the packet without releasing previously allocated mappings. A local user could exploit this flaw by generating network traffic under constrained memory conditions, leading to a resource leak and a potential Denial of Service (DoS) through DMA exhaustion.
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-772 · Missing Release of Resource after Effective Lifetime