CVE-2026-23172
kernel: Linux kernel t7xx WWAN driver: Denial of Service via buffer overflow
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · February 14, 2026
Updated · October 29, 2026
Description
A flaw was found in the Linux kernel's t7xx WWAN driver. A malicious, buggy, or compromised modem firmware can exploit this by sending packets with excessive fragments. This leads to a buffer overflow in the skb_shinfo(skb)->frags[] array, corrupting adjacent memory. This can result in kernel crashes or other undefined behavior, effectively causing 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 · 7.4CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE-787 · Out-of-bounds Write