Linux · Linux Kernel · CVE-2024-49979
Name of the Vulnerable Software and Affected Versions:
Linux kernel (affected versions not specified)
Description:
The issue concerns the Linux kernel's handling of TCP fragmentation. Specifically, it involves the `net: gso: fix tcp fraglist segmentation after pull from frag list` fix, which addresses a problem where optional datapath hooks like NAT and BPF can modify SKB GSO FRAGLIST skbs, breaking their invariants. This can lead to a NULL pointer dereference in ` tcpv4 gso segment list csum` at `tcp hdr(seg->next)`. The solution involves detecting invalid geometry due to pull by checking the `head skb` size and converting it to be able to pass to regular `skb segment` instead of `skb segment list`.
Recommendations:
At the moment, there is no information about a newer version that contains a fix for this vulnerability.