{
  "threat_severity" : "Moderate",
  "public_date" : "2025-08-19T00:00:00Z",
  "bugzilla" : {
    "description" : "kernel: ipv6: reject malicious packets in ipv6_gso_segment()",
    "id" : "2389517",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2389517"
  },
  "cvss3" : {
    "cvss3_base_score" : "7.4",
    "cvss3_scoring_vector" : "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H",
    "status" : "verified"
  },
  "cwe" : "CWE-120",
  "details" : [ "In the Linux kernel, the following vulnerability has been resolved:\nipv6: reject malicious packets in ipv6_gso_segment()\nsyzbot was able to craft a packet with very long IPv6 extension headers\nleading to an overflow of skb->transport_header.\nThis 16bit field has a limited range.\nAdd skb_reset_transport_header_careful() helper and use it\nfrom ipv6_gso_segment()\nWARNING: CPU: 0 PID: 5871 at ./include/linux/skbuff.h:3032 skb_reset_transport_header include/linux/skbuff.h:3032 [inline]\nWARNING: CPU: 0 PID: 5871 at ./include/linux/skbuff.h:3032 ipv6_gso_segment+0x15e2/0x21e0 net/ipv6/ip6_offload.c:151\nModules linked in:\nCPU: 0 UID: 0 PID: 5871 Comm: syz-executor211 Not tainted 6.16.0-rc6-syzkaller-g7abc678e3084 #0 PREEMPT(full)\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025\nRIP: 0010:skb_reset_transport_header include/linux/skbuff.h:3032 [inline]\nRIP: 0010:ipv6_gso_segment+0x15e2/0x21e0 net/ipv6/ip6_offload.c:151\nCall Trace:\n<TASK>\nskb_mac_gso_segment+0x31c/0x640 net/core/gso.c:53\nnsh_gso_segment+0x54a/0xe10 net/nsh/nsh.c:110\nskb_mac_gso_segment+0x31c/0x640 net/core/gso.c:53\n__skb_gso_segment+0x342/0x510 net/core/gso.c:124\nskb_gso_segment include/net/gso.h:83 [inline]\nvalidate_xmit_skb+0x857/0x11b0 net/core/dev.c:3950\nvalidate_xmit_skb_list+0x84/0x120 net/core/dev.c:4000\nsch_direct_xmit+0xd3/0x4b0 net/sched/sch_generic.c:329\n__dev_xmit_skb net/core/dev.c:4102 [inline]\n__dev_queue_xmit+0x17b6/0x3a70 net/core/dev.c:4679" ],
  "affected_release" : [ {
    "product_name" : "Red Hat Enterprise Linux 10",
    "release_date" : "2025-10-20T00:00:00Z",
    "advisory" : "RHSA-2025:18318",
    "cpe" : "cpe:/o:redhat:enterprise_linux:10.0",
    "package" : "kernel-0:6.12.0-55.40.1.el10_0"
  } ],
  "package_state" : [ {
    "product_name" : "Red Hat Enterprise Linux 6",
    "fix_state" : "Not affected",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:6"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7",
    "fix_state" : "Not affected",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7",
    "fix_state" : "Not affected",
    "package_name" : "kernel-rt",
    "cpe" : "cpe:/o:redhat:enterprise_linux:7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "fix_state" : "Not affected",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "fix_state" : "Not affected",
    "package_name" : "kernel-rt",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "fix_state" : "Not affected",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "fix_state" : "Not affected",
    "package_name" : "kernel-rt",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9"
  } ],
  "references" : [ "https://www.cve.org/CVERecord?id=CVE-2025-38572\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-38572\nhttps://lore.kernel.org/linux-cve-announce/2025081910-CVE-2025-38572-200b@gregkh/T" ],
  "name" : "CVE-2025-38572",
  "csaw" : false
}