https://vulnerability.circl.lu Contains only the most 10 recent entries. http://www.rssboard.org/rss-specification python-feedgen en Wed, 30 Sep 2026 07:52:15 +0000 https://vulnerability.circl.lu/vuln/cve-2024-49978 <p><strong>Affected:</strong> Linux</p> <p>In the Linux kernel, the following vulnerability has been resolved:</p> <p>gso: fix udp gso fraglist segmentation after pull from frag_list</p> <p>Detect gso fraglist skbs with corrupted geometry (see below) and pass these to skb_segment instead of skb_segment_list, as the first can segment them correctly.</p> <p>Valid SKB_GSO_FRAGLIST skbs - consist of two or more segments - the head_skb holds the protocol headers plus first gso_size - one or more frag_list skbs hold exactly one segment - all but the last must be gso_size</p> <p>Optional datapath hooks such as NAT and BPF (bpf_skb_pull_data) can modify these skbs, breaking these invariants.</p> <p>In extreme cases they pull all data into skb linear. For UDP, this causes a NULL ptr deref in __udpv4_gso_segment_list_csum at udp_hdr(seg-&gt;next)-&gt;dest.</p> <p>Detect invalid geometry due to pull, by checking head_skb size. Don&#39;t just drop, as this may blackhole a destination. Convert to be able to pass to regular skb_segment.</p> <p><strong>Affected:</strong> Linux</p> <p>In the Linux kernel, the following vulnerability has been resolved:</p> <p>gso: fix udp gso fraglist segmentation after pull from frag_list</p> <p>Detect gso fraglist skbs with corrupted geometry (see below) and pass these to skb_segment instead of skb_segment_list, as the first can segment them correctly.</p> <p>Valid SKB_GSO_FRAGLIST skbs - consist of two or more segments - the head_skb holds the protocol headers plus first gso_size - one or more frag_list skbs hold exactly one segment - all but the last must be gso_size</p> <p>Optional datapath hooks such as NAT and BPF (bpf_skb_pull_data) can modify these skbs, breaking these invariants.</p> <p>In extreme cases they pull all data into skb linear. For UDP, this causes a NULL ptr deref in __udpv4_gso_segment_list_csum at udp_hdr(seg-&gt;next)-&gt;dest.</p> <p>Detect invalid geometry due to pull, by checking head_skb size. Don&#39;t just drop, as this may blackhole a destination. Convert to be able to pass to regular skb_segment.</p> https://vulnerability.circl.lu/vuln/cve-2024-49978