Vulnerability-Lookup

FKIE_CVE-2023-52999

Vulnerability from fkie_nvd - Published: 2025-03-27 17:15 - Updated: 2026-06-17 06:44

Severity

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: net: fix UaF in netns ops registration error path If net_assign_generic() fails, the current error path in ops_init() tries to clear the gen pointer slot. Anyway, in such error path, the gen pointer itself has not been modified yet, and the existing and accessed one is smaller than the accessed index, causing an out-of-bounds error: BUG: KASAN: slab-out-of-bounds in ops_init+0x2de/0x320 Write of size 8 at addr ffff888109124978 by task modprobe/1018 CPU: 2 PID: 1018 Comm: modprobe Not tainted 6.2.0-rc2.mptcp_ae5ac65fbed5+ #1641 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.1-2.fc37 04/01/2014 Call Trace: <TASK> dump_stack_lvl+0x6a/0x9f print_address_description.constprop.0+0x86/0x2b5 print_report+0x11b/0x1fb kasan_report+0x87/0xc0 ops_init+0x2de/0x320 register_pernet_operations+0x2e4/0x750 register_pernet_subsys+0x24/0x40 tcf_register_action+0x9f/0x560 do_one_initcall+0xf9/0x570 do_init_module+0x190/0x650 load_module+0x1fa5/0x23c0 __do_sys_finit_module+0x10d/0x1b0 do_syscall_64+0x58/0x80 entry_SYSCALL_64_after_hwframe+0x72/0xdc RIP: 0033:0x7f42518f778d Code: 00 c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d cb 56 2c 00 f7 d8 64 89 01 48 RSP: 002b:00007fff96869688 EFLAGS: 00000246 ORIG_RAX: 0000000000000139 RAX: ffffffffffffffda RBX: 00005568ef7f7c90 RCX: 00007f42518f778d RDX: 0000000000000000 RSI: 00005568ef41d796 RDI: 0000000000000003 RBP: 00005568ef41d796 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000003 R11: 0000000000000246 R12: 0000000000000000 R13: 00005568ef7f7d30 R14: 0000000000040000 R15: 0000000000000000 </TASK> This change addresses the issue by skipping the gen pointer de-reference in the mentioned error-path. Found by code inspection and verified with explicit error injection on a kasan-enabled kernel.

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/12075708f2e77ee6a9f8bb2cf512c38be3099794	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/66689a72ba73575e76d4f6a8748d3fa2690ec1c4	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/71ab9c3e2253619136c31c89dbb2c69305cc89b1	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/ad0dfe9bcf0d78e699c7efb64c90ed062dc48bea	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/d4c008f3b7f7d4ffd311eb2dae5e75b3cbddacd0	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/ddd49cbbd4c1ceb38032018b589b44208e54f55e	Patch

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	6.0.7
linux	linux_kernel	6.2
linux	linux_kernel	6.2
linux	linux_kernel	6.2
linux	linux_kernel	6.2
linux	linux_kernel	6.2

JSON

To clipboard

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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: fix UaF in netns ops registration error path\n\nIf net_assign_generic() fails, the current error path in ops_init() tries\nto clear the gen pointer slot. Anyway, in such error path, the gen pointer\nitself has not been modified yet, and the existing and accessed one is\nsmaller than the accessed index, causing an out-of-bounds error:\n\n BUG: KASAN: slab-out-of-bounds in ops_init+0x2de/0x320\n Write of size 8 at addr ffff888109124978 by task modprobe/1018\n\n CPU: 2 PID: 1018 Comm: modprobe Not tainted 6.2.0-rc2.mptcp_ae5ac65fbed5+ #1641\n Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.1-2.fc37 04/01/2014\n Call Trace:\n  \u003cTASK\u003e\n  dump_stack_lvl+0x6a/0x9f\n  print_address_description.constprop.0+0x86/0x2b5\n  print_report+0x11b/0x1fb\n  kasan_report+0x87/0xc0\n  ops_init+0x2de/0x320\n  register_pernet_operations+0x2e4/0x750\n  register_pernet_subsys+0x24/0x40\n  tcf_register_action+0x9f/0x560\n  do_one_initcall+0xf9/0x570\n  do_init_module+0x190/0x650\n  load_module+0x1fa5/0x23c0\n  __do_sys_finit_module+0x10d/0x1b0\n  do_syscall_64+0x58/0x80\n  entry_SYSCALL_64_after_hwframe+0x72/0xdc\n RIP: 0033:0x7f42518f778d\n Code: 00 c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 48 89 f8 48 89 f7 48\n       89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 \u003c48\u003e 3d 01 f0 ff\n       ff 73 01 c3 48 8b 0d cb 56 2c 00 f7 d8 64 89 01 48\n RSP: 002b:00007fff96869688 EFLAGS: 00000246 ORIG_RAX: 0000000000000139\n RAX: ffffffffffffffda RBX: 00005568ef7f7c90 RCX: 00007f42518f778d\n RDX: 0000000000000000 RSI: 00005568ef41d796 RDI: 0000000000000003\n RBP: 00005568ef41d796 R08: 0000000000000000 R09: 0000000000000000\n R10: 0000000000000003 R11: 0000000000000246 R12: 0000000000000000\n R13: 00005568ef7f7d30 R14: 0000000000040000 R15: 0000000000000000\n  \u003c/TASK\u003e\n\nThis change addresses the issue by skipping the gen pointer\nde-reference in the mentioned error-path.\n\nFound by code inspection and verified with explicit error injection\non a kasan-enabled kernel."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net: corrige UaF en la ruta de error de registro de operaciones de netns Si net_assign_generic() falla, la ruta de error actual en ops_init() intenta borrar la ranura del puntero gen. De todas formas, en dicha ruta de error, el puntero gen en s\u00ed no se ha modificado a\u00fan, y el existente y al que se ha accedido es m\u00e1s peque\u00f1o que el \u00edndice accedido, lo que provoca un error fuera de los l\u00edmites: BUG: KASAN: slab-out-of-bounds en ops_init+0x2de/0x320 Escritura de tama\u00f1o 8 en la direcci\u00f3n ffff888109124978 por la tarea modprobe/1018 CPU: 2 PID: 1018 Comm: modprobe No contaminado 6.2.0-rc2.mptcp_ae5ac65fbed5+ #1641 Nombre del hardware: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.1-2.fc37 04/01/2014 Rastreo de llamadas:   dump_stack_lvl+0x6a/0x9f print_address_description.constprop.0+0x86/0x2b5 print_report+0x11b/0x1fb kasan_report+0x87/0xc0 ops_init+0x2de/0x320 register_pernet_operations+0x2e4/0x750 register_pernet_subsys+0x24/0x40 tcf_register_action+0x9f/0x560 do_one_initcall+0xf9/0x570 do_init_module+0x190/0x650 load_module+0x1fa5/0x23c0 __do_sys_finit_module+0x10d/0x1b0 do_syscall_64+0x58/0x80 entry_SYSCALL_64_after_hwframe+0x72/0xdc RIP: 0033:0x7f42518f778d Code: 00 c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 \u0026lt;48\u0026gt; 3d 01 f0 ff ff 73 01 c3 48 8b 0d cb 56 2c 00 f7 d8 64 89 01 48 RSP: 002b:00007fff96869688 EFLAGS: 00000246 ORIG_RAX: 0000000000000139 RAX: ffffffffffffffda RBX: 00005568ef7f7c90 RCX: 00007f42518f778d RDX: 0000000000000000 RSI: 00005568ef41d796 RDI: 0000000000000003 RBP: 00005568ef41d796 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000003 R11: 0000000000000246 R12: 0000000000000000 R13: 00005568ef7f7d30 R14: 0000000000040000 R15: 0000000000000000  Este cambio soluciona el problema omitiendo la desreferencia del puntero gen en la ruta de error mencionada. Se detect\u00f3 mediante inspecci\u00f3n de c\u00f3digo y se verific\u00f3 con inyecci\u00f3n de error expl\u00edcita en un kernel con kasan habilitado."
    }
  ],
  "id": "CVE-2023-52999",
  "lastModified": "2026-06-17T06:44:05.303",
  "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": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2023-52999",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2025-03-27T16:59:38.580749Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2025-03-27T17:15:48.683",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
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      "url": "https://git.kernel.org/stable/c/12075708f2e77ee6a9f8bb2cf512c38be3099794"
    },
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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      "url": "https://git.kernel.org/stable/c/66689a72ba73575e76d4f6a8748d3fa2690ec1c4"
    },
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      "url": "https://git.kernel.org/stable/c/71ab9c3e2253619136c31c89dbb2c69305cc89b1"
    },
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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      "url": "https://git.kernel.org/stable/c/ad0dfe9bcf0d78e699c7efb64c90ed062dc48bea"
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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      "url": "https://git.kernel.org/stable/c/d4c008f3b7f7d4ffd311eb2dae5e75b3cbddacd0"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
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      "url": "https://git.kernel.org/stable/c/ddd49cbbd4c1ceb38032018b589b44208e54f55e"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-416"
        }
      ],
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "type": "Secondary"
    }
  ]
}

CVE-2023-52999 (GCVE-0-2023-52999)

Vulnerability from cvelistv5 – Published: 2025-03-27 16:43 – Updated: 2026-08-05 09:12

Title

net: fix UaF in netns ops registration error path

Summary

Severity

7.8 (High)


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

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-03-27 16:59 UTC

CWE

CWE-416 - Use After Free

Assigner

Linux CNA under the mitre root

CNA scorecard D 53/100 over 6641 records in the last 180 days details

References

6 references

URL	Tags
https://git.kernel.org/stable/c/ad0dfe9bcf0d78e69…
https://git.kernel.org/stable/c/ddd49cbbd4c1ceb38…
https://git.kernel.org/stable/c/d4c008f3b7f7d4ffd…
https://git.kernel.org/stable/c/66689a72ba73575e7…
https://git.kernel.org/stable/c/12075708f2e77ee6a…
https://git.kernel.org/stable/c/71ab9c3e225361913…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 5a2ea549be94924364f6911227d99be86e8cf34a , < ad0dfe9bcf0d78e699c7efb64c90ed062dc48bea (git) Affected: 97ad240fd9aa9214497d14af2b91608e20856cac , < ddd49cbbd4c1ceb38032018b589b44208e54f55e (git) Affected: c3edc6e808209aa705185f732e682a370981ced1 , < d4c008f3b7f7d4ffd311eb2dae5e75b3cbddacd0 (git) Affected: a1e18acb0246bfb001b08b8b1b830b5ec92a0f13 , < 66689a72ba73575e76d4f6a8748d3fa2690ec1c4 (git) Affected: d266935ac43d57586e311a087510fe6a084af742 , < 12075708f2e77ee6a9f8bb2cf512c38be3099794 (git) Affected: d266935ac43d57586e311a087510fe6a084af742 , < 71ab9c3e2253619136c31c89dbb2c69305cc89b1 (git) Affected: 4a4df5e78712de39d6f90d6a64b5eb48dca03bd5 (git) Affected: 4.19.264 , < 4.19.272 (semver) Affected: 5.4.223 , < 5.4.231 (semver) Affected: 5.10.153 , < 5.10.166 (semver) Affected: 5.15.77 , < 5.15.91 (semver) Affected: 6.0.7 , < 6.1 (semver)
Linux	Linux	Affected: 6.1 Unaffected: 0 , < 6.1 (semver) Unaffected: 4.19.272 , ≤ 4.19.* (semver) Unaffected: 5.4.231 , ≤ 5.4.* (semver) Unaffected: 5.10.166 , ≤ 5.10.* (semver) Unaffected: 5.15.91 , ≤ 5.15.* (semver) Unaffected: 6.1.9 , ≤ 6.1.* (semver) Unaffected: 6.2 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "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"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2023-52999",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-03-27T16:59:38.580749Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-416",
                "description": "CWE-416 Use After Free",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-03-27T17:08:22.062Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/core/net_namespace.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "ad0dfe9bcf0d78e699c7efb64c90ed062dc48bea",
              "status": "affected",
              "version": "5a2ea549be94924364f6911227d99be86e8cf34a",
              "versionType": "git"
            },
            {
              "lessThan": "ddd49cbbd4c1ceb38032018b589b44208e54f55e",
              "status": "affected",
              "version": "97ad240fd9aa9214497d14af2b91608e20856cac",
              "versionType": "git"
            },
            {
              "lessThan": "d4c008f3b7f7d4ffd311eb2dae5e75b3cbddacd0",
              "status": "affected",
              "version": "c3edc6e808209aa705185f732e682a370981ced1",
              "versionType": "git"
            },
            {
              "lessThan": "66689a72ba73575e76d4f6a8748d3fa2690ec1c4",
              "status": "affected",
              "version": "a1e18acb0246bfb001b08b8b1b830b5ec92a0f13",
              "versionType": "git"
            },
            {
              "lessThan": "12075708f2e77ee6a9f8bb2cf512c38be3099794",
              "status": "affected",
              "version": "d266935ac43d57586e311a087510fe6a084af742",
              "versionType": "git"
            },
            {
              "lessThan": "71ab9c3e2253619136c31c89dbb2c69305cc89b1",
              "status": "affected",
              "version": "d266935ac43d57586e311a087510fe6a084af742",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "4a4df5e78712de39d6f90d6a64b5eb48dca03bd5",
              "versionType": "git"
            },
            {
              "lessThan": "4.19.272",
              "status": "affected",
              "version": "4.19.264",
              "versionType": "semver"
            },
            {
              "lessThan": "5.4.231",
              "status": "affected",
              "version": "5.4.223",
              "versionType": "semver"
            },
            {
              "lessThan": "5.10.166",
              "status": "affected",
              "version": "5.10.153",
              "versionType": "semver"
            },
            {
              "lessThan": "5.15.91",
              "status": "affected",
              "version": "5.15.77",
              "versionType": "semver"
            },
            {
              "lessThan": "6.1",
              "status": "affected",
              "version": "6.0.7",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/core/net_namespace.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.1"
            },
            {
              "lessThan": "6.1",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.19.*",
              "status": "unaffected",
              "version": "4.19.272",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.231",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.166",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.91",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.9",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.19.272",
                  "versionStartIncluding": "4.19.264",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.4.231",
                  "versionStartIncluding": "5.4.223",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.166",
                  "versionStartIncluding": "5.10.153",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.91",
                  "versionStartIncluding": "5.15.77",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.9",
                  "versionStartIncluding": "6.1",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.2",
                  "versionStartIncluding": "6.1",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "6.0.7",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: fix UaF in netns ops registration error path\n\nIf net_assign_generic() fails, the current error path in ops_init() tries\nto clear the gen pointer slot. Anyway, in such error path, the gen pointer\nitself has not been modified yet, and the existing and accessed one is\nsmaller than the accessed index, causing an out-of-bounds error:\n\n BUG: KASAN: slab-out-of-bounds in ops_init+0x2de/0x320\n Write of size 8 at addr ffff888109124978 by task modprobe/1018\n\n CPU: 2 PID: 1018 Comm: modprobe Not tainted 6.2.0-rc2.mptcp_ae5ac65fbed5+ #1641\n Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.1-2.fc37 04/01/2014\n Call Trace:\n  \u003cTASK\u003e\n  dump_stack_lvl+0x6a/0x9f\n  print_address_description.constprop.0+0x86/0x2b5\n  print_report+0x11b/0x1fb\n  kasan_report+0x87/0xc0\n  ops_init+0x2de/0x320\n  register_pernet_operations+0x2e4/0x750\n  register_pernet_subsys+0x24/0x40\n  tcf_register_action+0x9f/0x560\n  do_one_initcall+0xf9/0x570\n  do_init_module+0x190/0x650\n  load_module+0x1fa5/0x23c0\n  __do_sys_finit_module+0x10d/0x1b0\n  do_syscall_64+0x58/0x80\n  entry_SYSCALL_64_after_hwframe+0x72/0xdc\n RIP: 0033:0x7f42518f778d\n Code: 00 c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 48 89 f8 48 89 f7 48\n       89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 \u003c48\u003e 3d 01 f0 ff\n       ff 73 01 c3 48 8b 0d cb 56 2c 00 f7 d8 64 89 01 48\n RSP: 002b:00007fff96869688 EFLAGS: 00000246 ORIG_RAX: 0000000000000139\n RAX: ffffffffffffffda RBX: 00005568ef7f7c90 RCX: 00007f42518f778d\n RDX: 0000000000000000 RSI: 00005568ef41d796 RDI: 0000000000000003\n RBP: 00005568ef41d796 R08: 0000000000000000 R09: 0000000000000000\n R10: 0000000000000003 R11: 0000000000000246 R12: 0000000000000000\n R13: 00005568ef7f7d30 R14: 0000000000040000 R15: 0000000000000000\n  \u003c/TASK\u003e\n\nThis change addresses the issue by skipping the gen pointer\nde-reference in the mentioned error-path.\n\nFound by code inspection and verified with explicit error injection\non a kasan-enabled kernel."
        }
      ],
      "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 vulnerable ops_init() path runs during register_pernet_subsys/device on module init, which an unprivileged local attacker can trigger via socket() autoload of protocol modules (e.g. AF_KCM/AF_RXRPC/AF_PHONET/AF_TIPC) or via CAP_NET_ADMIN in a user namespace loading tc act_* modules.\nAC:L - The attacker can induce the required net_assign_generic() ENOMEM failure by exhausting memory before triggering module autoload, and no victim-controlled or otherwise uncontrollable race/state is required beyond that attacker-driven condition.\nPR:L - No elevated host privileges are needed: a normal local user can call socket() to request_module net-pf-* modules that register pernet ops with id+size, or obtain CAP_NET_ADMIN only inside a user/net namespace to autoload tc action modules into the same path.\nUI:N - Exploitation requires no victim action; the attacker unilaterally creates sockets or netlink messages that cause the vulnerable registration error path to run.\nS:U - This is a host-kernel memory-corruption bug in netns registration; impact remains within the same kernel security authority with no VM/IOMMU/sandbox boundary crossed.\nC:H - The bug is an 8-byte out-of-bounds write into adjacent slab memory, which is memory corruption that can be shaped into an information-disclosure primitive under the scoring guidance for OOB writes.\nI:H - The slab out-of-bounds write of a NULL pointer into neighboring heap objects is an integrity-corrupting memory-safety violation that can be leveraged toward control-flow or object corruption, matching High for OOB write.\nA:H - The out-of-bounds write can crash the kernel (KASAN reports slab-out-of-bounds; without KASAN, adjacent-object corruption can oops/panic), so availability impact is High."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T09:12:19.715Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/ad0dfe9bcf0d78e699c7efb64c90ed062dc48bea"
        },
        {
          "url": "https://git.kernel.org/stable/c/ddd49cbbd4c1ceb38032018b589b44208e54f55e"
        },
        {
          "url": "https://git.kernel.org/stable/c/d4c008f3b7f7d4ffd311eb2dae5e75b3cbddacd0"
        },
        {
          "url": "https://git.kernel.org/stable/c/66689a72ba73575e76d4f6a8748d3fa2690ec1c4"
        },
        {
          "url": "https://git.kernel.org/stable/c/12075708f2e77ee6a9f8bb2cf512c38be3099794"
        },
        {
          "url": "https://git.kernel.org/stable/c/71ab9c3e2253619136c31c89dbb2c69305cc89b1"
        }
      ],
      "title": "net: fix UaF in netns ops registration error path",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2023-52999",
    "datePublished": "2025-03-27T16:43:32.497Z",
    "dateReserved": "2025-03-27T16:40:15.742Z",
    "dateUpdated": "2026-08-05T09:12:19.715Z",
    "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.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

Order JSON

How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.

Publication & reservation Sightings KEV catalogs Other timestamps

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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.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

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