Huawei EulerOS: CVE-2024-49948: kernel security update

Huawei EulerOS: CVE-2024-49948: kernel security update

Severity

4

CVSS

(AV:L/AC:M/Au:N/C:P/I:P/A:P)

Published

10/21/2024

Created

02/12/2025

Added

02/11/2025

Modified

02/11/2025

Description

In the Linux kernel, the following vulnerability has been resolved: net: add more sanity checks to qdisc_pkt_len_init() One path takes care of SKB_GSO_DODGY, assuming skb->len is bigger than hdr_len. virtio_net_hdr_to_skb() does not fully dissect TCP headers, it only make sure it is at least 20 bytes. It is possible for an user to provide a malicious 'GSO' packet, total length of 80 bytes. - 20 bytes of IPv4 header - 60 bytes TCP header - a small gso_size like 8 virtio_net_hdr_to_skb() would declare this packet as a normal GSO packet, because it would see 40 bytes of payload, bigger than gso_size. We need to make detect this case to not underflow qdisc_skb_cb(skb)->pkt_len.

Solution(s)

• huawei-euleros-2_0_sp12-upgrade-bpftool
• huawei-euleros-2_0_sp12-upgrade-kernel
• huawei-euleros-2_0_sp12-upgrade-kernel-abi-stablelists
• huawei-euleros-2_0_sp12-upgrade-kernel-tools
• huawei-euleros-2_0_sp12-upgrade-kernel-tools-libs
• huawei-euleros-2_0_sp12-upgrade-python3-perf

References

• https://attackerkb.com/topics/cve-2024-49948
• CVE - 2024-49948
• EulerOS-SA-2025-1192