CVE-2026-97953
kernel: net: stmmac: fix TX descriptor availability check for TSO traffic
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · September 25, 2026
Updated · September 30, 2026
Description
A flaw was found in the Linux kernel's stmmac network driver. An attacker can cause a Denial of Service (DoS) by transmitting highly fragmented network packets that use TCP Segmentation Offload (TSO). Due to an improper calculation of required transmit descriptors, the driver writes past available slots and corrupts memory in the transmit ring buffer, leading to driver malfunction or a system crash.
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-787 · Out-of-bounds Write