{
  "cveId": "CVE-2024-49978",
  "url": "https://patchblox.com/security/cve/CVE-2024-49978",
  "summary": "CVE-2024-49978 is fixed in 47 products on 1 platform, first by DEBIAN-CVE-2024-49978, released October 21, 2024. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "gso: fix udp gso fraglist segmentation after pull from frag_list",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  gso: fix udp gso fraglist segmentation after pull from frag_list  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.  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  Optional datapath hooks such as NAT and BPF (bpf_skb_pull_data) can modify these skbs, breaking these invariants.  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-\u003Enext)-\u003Edest.  Detect invalid geometry due to pull, by checking head_skb size. Don\u0027t just drop, as this may blackhole a destination. Convert to be able to pass to regular skb_segment.",
  "published": "2024-10-21T18:15:18Z",
  "severity": "Moderate",
  "cvss": 5.5,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
  "cwe": "NULL Pointer Dereference",
  "epss": 0.00659,
  "epssPercentile": 0.51812,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-49978",
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    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
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}