fkie_cve-2025-38572
Vulnerability from fkie_nvd
Published
2025-08-19 17:15
Modified
2025-08-28 15:15
Severity ?
Summary
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: <TASK> 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
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/09ff062b89d8e48165247d677d1ca23d6d607e9b
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3f638e0b28bde7c3354a0df938ab3a96739455d1
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5489e7fc6f8be3062f8cb7e49406de4bfd94db67
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/573b8250fc2554761db3bc2bbdbab23789d52d4e
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5dc60b2a00ed7629214ac0c48e43f40af2078703
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d45cf1e7d7180256e17c9ce88e32e8061a7887fe
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/de322cdf600fc9433845a9e944d1ca6b31cfb67e
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ee851768e4b8371ce151fd446d24bf3ae2d18789
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ef05007b403dcc21e701cb1f30d4572ac0a9da20
Impacted products
Vendor Product Version


To clipboard 

{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "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"
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ipv6: rechazar paquetes maliciosos en ipv6_gso_segment(). syzbot pudo manipular un paquete con encabezados de extensi\u00f3n IPv6 muy largos, lo que provoc\u00f3 un desbordamiento de skb-\u0026gt;transport_header. Este campo de 16 bits tiene un alcance limitado. Agregue el asistente skb_reset_transport_header_careful() y \u00faselo desde ipv6_gso_segment() ADVERTENCIA: CPU: 0 PID: 5871 en ./include/linux/skbuff.h:3032 skb_reset_transport_header include/linux/skbuff.h:3032 [en l\u00ednea] ADVERTENCIA: CPU: 0 PID: 5871 en ./include/linux/skbuff.h:3032 ipv6_gso_segment+0x15e2/0x21e0 net/ipv6/ip6_offload.c:151 M\u00f3dulos vinculados: CPU: 0 UID: 0 PID: 5871 Comm: syz-executor211 No contaminado 6.16.0-rc6-syzkaller-g7abc678e3084 #0 PREEMPT(completo) Nombre del hardware: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/07/2025 RIP: 0010:skb_reset_transport_header include/linux/skbuff.h:3032 [en l\u00ednea] RIP: 0010:ipv6_gso_segment+0x15e2/0x21e0 net/ipv6/ip6_offload.c:151 Rastreo de llamadas:  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 "
    }
  ],
  "id": "CVE-2025-38572",
  "lastModified": "2025-08-28T15:15:53.597",
  "metrics": {},
  "published": "2025-08-19T17:15:34.117",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/09ff062b89d8e48165247d677d1ca23d6d607e9b"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/3f638e0b28bde7c3354a0df938ab3a96739455d1"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/5489e7fc6f8be3062f8cb7e49406de4bfd94db67"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/573b8250fc2554761db3bc2bbdbab23789d52d4e"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/5dc60b2a00ed7629214ac0c48e43f40af2078703"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/d45cf1e7d7180256e17c9ce88e32e8061a7887fe"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/de322cdf600fc9433845a9e944d1ca6b31cfb67e"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/ee851768e4b8371ce151fd446d24bf3ae2d18789"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/ef05007b403dcc21e701cb1f30d4572ac0a9da20"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Awaiting Analysis"
}


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