CVE-2024-49948
kernel: net: add more sanity checks to qdisc_pkt_len_init()
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · October 21, 2024
Updated · October 29, 2026
Description
A flaw was found in the Linux kernel's network handling, specifically within the qdisc_pkt_len_init() function. A local user could exploit this by crafting a malicious Generic Segmentation Offload (GSO) packet. Insufficient sanity checks in the virtio_net_hdr_to_skb() function allow for an underflow in the packet length calculation. This underflow can lead to a denial of service (DoS) condition, making the system unavailable.
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
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
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-20 · Improper Input Validation