CVE-2025-38572 (GCVE-0-2025-38572)
Vulnerability from cvelistv5
Published
2025-08-19 17:02
Modified
2025-08-28 14:43
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
Linux Linux Version: d1da932ed4ecad2a14cbcc01ed589d617d0f0f09
Version: d1da932ed4ecad2a14cbcc01ed589d617d0f0f09
Version: d1da932ed4ecad2a14cbcc01ed589d617d0f0f09
Version: d1da932ed4ecad2a14cbcc01ed589d617d0f0f09
Version: d1da932ed4ecad2a14cbcc01ed589d617d0f0f09
Version: d1da932ed4ecad2a14cbcc01ed589d617d0f0f09
Version: d1da932ed4ecad2a14cbcc01ed589d617d0f0f09
Version: d1da932ed4ecad2a14cbcc01ed589d617d0f0f09
Version: d1da932ed4ecad2a14cbcc01ed589d617d0f0f09
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{
  "containers": {
    "cna": {
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        {
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          "product": "Linux",
          "programFiles": [
            "include/linux/skbuff.h",
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          "vendor": "Linux",
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              "version": "0",
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              "version": "5.10.241",
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              "status": "unaffected",
              "version": "5.15.190",
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              "status": "unaffected",
              "version": "6.17-rc1",
              "versionType": "original_commit_for_fix"
            }
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                  "versionEndExcluding": "5.4.297",
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                  "vulnerable": true
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                  "versionEndExcluding": "5.10.241",
                  "versionStartIncluding": "3.8",
                  "vulnerable": true
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                  "vulnerable": true
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              "negate": false,
              "operator": "OR"
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      ],
      "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"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-08-28T14:43:52.424Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/5dc60b2a00ed7629214ac0c48e43f40af2078703"
        },
        {
          "url": "https://git.kernel.org/stable/c/3f638e0b28bde7c3354a0df938ab3a96739455d1"
        },
        {
          "url": "https://git.kernel.org/stable/c/09ff062b89d8e48165247d677d1ca23d6d607e9b"
        },
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          "url": "https://git.kernel.org/stable/c/de322cdf600fc9433845a9e944d1ca6b31cfb67e"
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        },
        {
          "url": "https://git.kernel.org/stable/c/d45cf1e7d7180256e17c9ce88e32e8061a7887fe"
        }
      ],
      "title": "ipv6: reject malicious packets in ipv6_gso_segment()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-38572",
    "datePublished": "2025-08-19T17:02:52.340Z",
    "dateReserved": "2025-04-16T04:51:24.025Z",
    "dateUpdated": "2025-08-28T14:43:52.424Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-38572\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-08-19T17:15:34.117\",\"lastModified\":\"2025-08-28T15:15:53.597\",\"vulnStatus\":\"Awaiting Analysis\",\"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 \"}],\"metrics\":{},\"references\":[{\"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\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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