Tracker / CVE-2024-49948
CVE-2024-49948
Medium 5.5
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.
Affected products and versions
| linux | linux_kernel |
|---|---|
| linux | linux_kernel · 3.9 → 4.19.323 |
| linux | linux_kernel · 4.20 → 5.4.285 |
| linux | linux_kernel · 5.11 → 5.15.168 |
| linux | linux_kernel · 5.16 → 6.1.113 |
| linux | linux_kernel · 5.5 → 5.10.227 |
| linux | linux_kernel · 6.11 → 6.11.3 |
| linux | linux_kernel · 6.2 → 6.6.55 |
| linux | linux_kernel · 6.7 → 6.10.14 |
Analysis
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