ghsa-j327-57v5-q43v
Vulnerability from github
Published
2025-08-19 18:31
Modified
2025-08-28 15:30
Details

In the Linux kernel, the following vulnerability has been resolved:

ipv6: reject malicious packets in ipv6_gso_segment()

syzbot was able to craft a packet with very long IPv6 extension headers leading to an overflow of skb->transport_header.

This 16bit field has a limited range.

Add skb_reset_transport_header_careful() helper and use it from ipv6_gso_segment()

WARNING: CPU: 0 PID: 5871 at ./include/linux/skbuff.h:3032 skb_reset_transport_header include/linux/skbuff.h:3032 [inline] WARNING: CPU: 0 PID: 5871 at ./include/linux/skbuff.h:3032 ipv6_gso_segment+0x15e2/0x21e0 net/ipv6/ip6_offload.c:151 Modules linked in: CPU: 0 UID: 0 PID: 5871 Comm: syz-executor211 Not tainted 6.16.0-rc6-syzkaller-g7abc678e3084 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 RIP: 0010:skb_reset_transport_header include/linux/skbuff.h:3032 [inline] RIP: 0010:ipv6_gso_segment+0x15e2/0x21e0 net/ipv6/ip6_offload.c:151 Call Trace: skb_mac_gso_segment+0x31c/0x640 net/core/gso.c:53 nsh_gso_segment+0x54a/0xe10 net/nsh/nsh.c:110 skb_mac_gso_segment+0x31c/0x640 net/core/gso.c:53 __skb_gso_segment+0x342/0x510 net/core/gso.c:124 skb_gso_segment include/net/gso.h:83 [inline] validate_xmit_skb+0x857/0x11b0 net/core/dev.c:3950 validate_xmit_skb_list+0x84/0x120 net/core/dev.c:4000 sch_direct_xmit+0xd3/0x4b0 net/sched/sch_generic.c:329 __dev_xmit_skb net/core/dev.c:4102 [inline] __dev_queue_xmit+0x17b6/0x3a70 net/core/dev.c:4679

Show details on source website

To clipboard 

{
  "affected": [],
  "aliases": [
    "CVE-2025-38572"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-08-19T17:15:34Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nipv6: reject malicious packets in ipv6_gso_segment()\n\nsyzbot was able to craft a packet with very long IPv6 extension headers\nleading to an overflow of skb-\u003etransport_header.\n\nThis 16bit field has a limited range.\n\nAdd skb_reset_transport_header_careful() helper and use it\nfrom ipv6_gso_segment()\n\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\n RIP: 0010:skb_reset_transport_header include/linux/skbuff.h:3032 [inline]\n RIP: 0010:ipv6_gso_segment+0x15e2/0x21e0 net/ipv6/ip6_offload.c:151\nCall Trace:\n \u003cTASK\u003e\n  skb_mac_gso_segment+0x31c/0x640 net/core/gso.c:53\n  nsh_gso_segment+0x54a/0xe10 net/nsh/nsh.c:110\n  skb_mac_gso_segment+0x31c/0x640 net/core/gso.c:53\n  __skb_gso_segment+0x342/0x510 net/core/gso.c:124\n  skb_gso_segment include/net/gso.h:83 [inline]\n  validate_xmit_skb+0x857/0x11b0 net/core/dev.c:3950\n  validate_xmit_skb_list+0x84/0x120 net/core/dev.c:4000\n  sch_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",
  "id": "GHSA-j327-57v5-q43v",
  "modified": "2025-08-28T15:30:38Z",
  "published": "2025-08-19T18:31:33Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-38572"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/09ff062b89d8e48165247d677d1ca23d6d607e9b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3f638e0b28bde7c3354a0df938ab3a96739455d1"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5489e7fc6f8be3062f8cb7e49406de4bfd94db67"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/573b8250fc2554761db3bc2bbdbab23789d52d4e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5dc60b2a00ed7629214ac0c48e43f40af2078703"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d45cf1e7d7180256e17c9ce88e32e8061a7887fe"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/de322cdf600fc9433845a9e944d1ca6b31cfb67e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ee851768e4b8371ce151fd446d24bf3ae2d18789"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ef05007b403dcc21e701cb1f30d4572ac0a9da20"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.