Vulnerability-Lookup

FKIE_CVE-2025-38572

Vulnerability from fkie_nvd - Published: 2025-08-19 17:15 - Updated: 2026-07-30 06:23

Severity

7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/09ff062b89d8e48165247d677d1ca23d6d607e9b	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/3f638e0b28bde7c3354a0df938ab3a96739455d1	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/5489e7fc6f8be3062f8cb7e49406de4bfd94db67	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/573b8250fc2554761db3bc2bbdbab23789d52d4e	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/5dc60b2a00ed7629214ac0c48e43f40af2078703	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/d45cf1e7d7180256e17c9ce88e32e8061a7887fe	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/de322cdf600fc9433845a9e944d1ca6b31cfb67e	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/ee851768e4b8371ce151fd446d24bf3ae2d18789	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/ef05007b403dcc21e701cb1f30d4572ac0a9da20	Patch
af854a3a-2127-422b-91ae-364da2661108	https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html	Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html	Mailing List, Third Party Advisory

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
debian	debian_linux	11.0

JSON

To clipboard

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          "vendor": "Linux",
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            {
              "status": "affected",
              "version": "3.8"
            },
            {
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
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              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.297",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.241",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.190",
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            },
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              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.148",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.102",
              "versionType": "semver"
            },
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              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.42",
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            },
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              "lessThanOrEqual": "6.15.*",
              "status": "unaffected",
              "version": "6.15.10",
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            },
            {
              "lessThanOrEqual": "6.16.*",
              "status": "unaffected",
              "version": "6.16.1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.17",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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  ],
  "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": "2026-07-30T06:23:27.373",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
      },
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2025-08-19T17:15:34.117",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/09ff062b89d8e48165247d677d1ca23d6d607e9b"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/3f638e0b28bde7c3354a0df938ab3a96739455d1"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/5489e7fc6f8be3062f8cb7e49406de4bfd94db67"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
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      "url": "https://git.kernel.org/stable/c/573b8250fc2554761db3bc2bbdbab23789d52d4e"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
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      "url": "https://git.kernel.org/stable/c/5dc60b2a00ed7629214ac0c48e43f40af2078703"
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Mailing List",
        "Third Party Advisory"
      ],
      "url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Mailing List",
        "Third Party Advisory"
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      "url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-noinfo"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

CVE-2025-38572 (GCVE-0-2025-38572)

Vulnerability from cvelistv5 – Published: 2025-08-19 17:02 – Updated: 2026-08-05 12:03

Title

ipv6: reject malicious packets in ipv6_gso_segment()

Summary

Severity

7.8 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Assigner

Linux mitre root

References

11 references

URL	Tags
https://git.kernel.org/stable/c/5dc60b2a00ed76292…
https://git.kernel.org/stable/c/3f638e0b28bde7c33…
https://git.kernel.org/stable/c/09ff062b89d8e4816…
https://git.kernel.org/stable/c/de322cdf600fc9433…
https://git.kernel.org/stable/c/ef05007b403dcc21e…
https://git.kernel.org/stable/c/5489e7fc6f8be3062…
https://git.kernel.org/stable/c/573b8250fc2554761…
https://git.kernel.org/stable/c/ee851768e4b8371ce…
https://git.kernel.org/stable/c/d45cf1e7d7180256e…
https://lists.debian.org/debian-lts-announce/2025…
https://lists.debian.org/debian-lts-announce/2025…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: d1da932ed4ecad2a14cbcc01ed589d617d0f0f09 , < 5dc60b2a00ed7629214ac0c48e43f40af2078703 (git) Affected: d1da932ed4ecad2a14cbcc01ed589d617d0f0f09 , < 3f638e0b28bde7c3354a0df938ab3a96739455d1 (git) Affected: d1da932ed4ecad2a14cbcc01ed589d617d0f0f09 , < 09ff062b89d8e48165247d677d1ca23d6d607e9b (git) Affected: d1da932ed4ecad2a14cbcc01ed589d617d0f0f09 , < de322cdf600fc9433845a9e944d1ca6b31cfb67e (git) Affected: d1da932ed4ecad2a14cbcc01ed589d617d0f0f09 , < ef05007b403dcc21e701cb1f30d4572ac0a9da20 (git) Affected: d1da932ed4ecad2a14cbcc01ed589d617d0f0f09 , < 5489e7fc6f8be3062f8cb7e49406de4bfd94db67 (git) Affected: d1da932ed4ecad2a14cbcc01ed589d617d0f0f09 , < 573b8250fc2554761db3bc2bbdbab23789d52d4e (git) Affected: d1da932ed4ecad2a14cbcc01ed589d617d0f0f09 , < ee851768e4b8371ce151fd446d24bf3ae2d18789 (git) Affected: d1da932ed4ecad2a14cbcc01ed589d617d0f0f09 , < d45cf1e7d7180256e17c9ce88e32e8061a7887fe (git)
Linux	Linux	Affected: 3.8 Unaffected: 0 , < 3.8 (semver) Unaffected: 5.4.297 , ≤ 5.4.* (semver) Unaffected: 5.10.241 , ≤ 5.10.* (semver) Unaffected: 5.15.190 , ≤ 5.15.* (semver) Unaffected: 6.1.148 , ≤ 6.1.* (semver) Unaffected: 6.6.102 , ≤ 6.6.* (semver) Unaffected: 6.12.42 , ≤ 6.12.* (semver) Unaffected: 6.15.10 , ≤ 6.15.* (semver) Unaffected: 6.16.1 , ≤ 6.16.* (semver) Unaffected: 6.17 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2025-11-03T17:39:59.107Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html"
          },
          {
            "url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "include/linux/skbuff.h",
            "net/ipv6/ip6_offload.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "5dc60b2a00ed7629214ac0c48e43f40af2078703",
              "status": "affected",
              "version": "d1da932ed4ecad2a14cbcc01ed589d617d0f0f09",
              "versionType": "git"
            },
            {
              "lessThan": "3f638e0b28bde7c3354a0df938ab3a96739455d1",
              "status": "affected",
              "version": "d1da932ed4ecad2a14cbcc01ed589d617d0f0f09",
              "versionType": "git"
            },
            {
              "lessThan": "09ff062b89d8e48165247d677d1ca23d6d607e9b",
              "status": "affected",
              "version": "d1da932ed4ecad2a14cbcc01ed589d617d0f0f09",
              "versionType": "git"
            },
            {
              "lessThan": "de322cdf600fc9433845a9e944d1ca6b31cfb67e",
              "status": "affected",
              "version": "d1da932ed4ecad2a14cbcc01ed589d617d0f0f09",
              "versionType": "git"
            },
            {
              "lessThan": "ef05007b403dcc21e701cb1f30d4572ac0a9da20",
              "status": "affected",
              "version": "d1da932ed4ecad2a14cbcc01ed589d617d0f0f09",
              "versionType": "git"
            },
            {
              "lessThan": "5489e7fc6f8be3062f8cb7e49406de4bfd94db67",
              "status": "affected",
              "version": "d1da932ed4ecad2a14cbcc01ed589d617d0f0f09",
              "versionType": "git"
            },
            {
              "lessThan": "573b8250fc2554761db3bc2bbdbab23789d52d4e",
              "status": "affected",
              "version": "d1da932ed4ecad2a14cbcc01ed589d617d0f0f09",
              "versionType": "git"
            },
            {
              "lessThan": "ee851768e4b8371ce151fd446d24bf3ae2d18789",
              "status": "affected",
              "version": "d1da932ed4ecad2a14cbcc01ed589d617d0f0f09",
              "versionType": "git"
            },
            {
              "lessThan": "d45cf1e7d7180256e17c9ce88e32e8061a7887fe",
              "status": "affected",
              "version": "d1da932ed4ecad2a14cbcc01ed589d617d0f0f09",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "include/linux/skbuff.h",
            "net/ipv6/ip6_offload.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "3.8"
            },
            {
              "lessThan": "3.8",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.297",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.241",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.190",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.148",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.102",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.42",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.15.*",
              "status": "unaffected",
              "version": "6.15.10",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.16.*",
              "status": "unaffected",
              "version": "6.16.1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.17",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.4.297",
                  "versionStartIncluding": "3.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.241",
                  "versionStartIncluding": "3.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.190",
                  "versionStartIncluding": "3.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.148",
                  "versionStartIncluding": "3.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.102",
                  "versionStartIncluding": "3.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.42",
                  "versionStartIncluding": "3.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.15.10",
                  "versionStartIncluding": "3.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.16.1",
                  "versionStartIncluding": "3.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.17",
                  "versionStartIncluding": "3.8",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "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"
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The overflow is in the transmit-side GSO segmentation path (`validate_xmit_skb` \u2192 `__skb_gso_segment` \u2192 `ipv6_gso_segment`), reached by locally injecting a crafted GSO skb via an `AF_PACKET`/`PACKET_VNET_HDR` socket or a tun/tap device. A \u003e64KB extension-header chain cannot be delivered in a single frame over any real link and GRO does not grow the header chain, so a purely remote packet cannot reach it.\nAC:L - The attacker fully controls the number and size of IPv6 extension headers, the linear-area size (`vnet_hdr.hdr_len`), the gso_type/gso_size and `csum_start`, so `skb-\u003edata - skb-\u003ehead` can be driven deterministically past 65535 and made to satisfy the `skb_checksum_start() != skb_transport_header()` guard in `tcp_gso_segment()`. No race, timing window, or memory grooming is involved.\nPR:L - A local socket is required, but `unshare -Urn` gives any unprivileged user CAP_NET_RAW and CAP_NET_ADMIN inside a fresh user+net namespace \u2014 enough to open an `AF_PACKET` socket, disable GSO offload on a veth/dummy, and transmit; the `IPV6_2292PKTOPTIONS` (64KB) plus `UDP_SEGMENT` route needs no capability at all.\nUI:N - The attacking process triggers the flaw entirely on its own by sending a packet; no victim action such as mounting, opening a file, or connecting is required.\nS:U - The truncated header offset and all resulting bad accesses stay inside the kernel\u0027s own security authority \u2014 no hypervisor, IOMMU, or sandbox boundary is crossed.\nC:H - `skb_transport_header()` is left pointing at an attacker-chosen wrong location and `skb_network_header_len()` wraps to a ~64K u16, so segmentation reads header fields and copies data from out-of-bounds/unintended offsets into the emitted segments, which are then transmitted on the wire \u2014 an unbounded disclosure primitive rather than a few strictly bounded bytes.\nI:H - The corrupted offset is propagated into every segment by `__copy_skb_header()`/`skb_headers_offset_update()` (u16 arithmetic that itself wraps), and the callbacks then write `th-\u003eseq`, `th-\u003echeck`, `th-\u003efin/psh/cwr`, `uh-\u003elen`, `uh-\u003echeck` and `*prevhdr` through it, giving attacker-directed writes at offsets the kernel never validated.\nA:H - The negative `skb_transport_offset()` flows into `skb_push()`/length computations in `skb_segment()`/`skb_segment_list()` where it can trip `skb_under_panic()`, each segment forces a \u003e64KB allocation, and on `CONFIG_DEBUG_NET`/`panic_on_warn` kernels the `WARN` in `skb_reset_transport_header()` panics outright \u2014 all repeatable at will from an unprivileged process."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T12:03:00.703Z",
        "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"
        },
        {
          "url": "https://git.kernel.org/stable/c/de322cdf600fc9433845a9e944d1ca6b31cfb67e"
        },
        {
          "url": "https://git.kernel.org/stable/c/ef05007b403dcc21e701cb1f30d4572ac0a9da20"
        },
        {
          "url": "https://git.kernel.org/stable/c/5489e7fc6f8be3062f8cb7e49406de4bfd94db67"
        },
        {
          "url": "https://git.kernel.org/stable/c/573b8250fc2554761db3bc2bbdbab23789d52d4e"
        },
        {
          "url": "https://git.kernel.org/stable/c/ee851768e4b8371ce151fd446d24bf3ae2d18789"
        },
        {
          "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": "2026-08-05T12:03:00.703Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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FKIE_CVE-2025-38572

CVE-2025-38572 (GCVE-0-2025-38572)

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