Vulnerability-Lookup

FKIE_CVE-2025-37894

Vulnerability from fkie_nvd - Published: 2025-05-20 16:15 - Updated: 2026-07-30 06:22

Severity

9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Summary

In the Linux kernel, the following vulnerability has been resolved: net: use sock_gen_put() when sk_state is TCP_TIME_WAIT It is possible for a pointer of type struct inet_timewait_sock to be returned from the functions __inet_lookup_established() and __inet6_lookup_established(). This can cause a crash when the returned pointer is of type struct inet_timewait_sock and sock_put() is called on it. The following is a crash call stack that shows sk->sk_wmem_alloc being accessed in sk_free() during the call to sock_put() on a struct inet_timewait_sock pointer. To avoid this issue, use sock_gen_put() instead of sock_put() when sk->sk_state is TCP_TIME_WAIT. mrdump.ko ipanic() + 120 vmlinux notifier_call_chain(nr_to_call=-1, nr_calls=0) + 132 vmlinux atomic_notifier_call_chain(val=0) + 56 vmlinux panic() + 344 vmlinux add_taint() + 164 vmlinux end_report() + 136 vmlinux kasan_report(size=0) + 236 vmlinux report_tag_fault() + 16 vmlinux do_tag_recovery() + 16 vmlinux __do_kernel_fault() + 88 vmlinux do_bad_area() + 28 vmlinux do_tag_check_fault() + 60 vmlinux do_mem_abort() + 80 vmlinux el1_abort() + 56 vmlinux el1h_64_sync_handler() + 124 vmlinux > 0xFFFFFFC080011294() vmlinux __lse_atomic_fetch_add_release(v=0xF2FFFF82A896087C) vmlinux __lse_atomic_fetch_sub_release(v=0xF2FFFF82A896087C) vmlinux arch_atomic_fetch_sub_release(i=1, v=0xF2FFFF82A896087C) + 8 vmlinux raw_atomic_fetch_sub_release(i=1, v=0xF2FFFF82A896087C) + 8 vmlinux atomic_fetch_sub_release(i=1, v=0xF2FFFF82A896087C) + 8 vmlinux __refcount_sub_and_test(i=1, r=0xF2FFFF82A896087C, oldp=0) + 8 vmlinux __refcount_dec_and_test(r=0xF2FFFF82A896087C, oldp=0) + 8 vmlinux refcount_dec_and_test(r=0xF2FFFF82A896087C) + 8 vmlinux sk_free(sk=0xF2FFFF82A8960700) + 28 vmlinux sock_put() + 48 vmlinux tcp6_check_fraglist_gro() + 236 vmlinux tcp6_gro_receive() + 624 vmlinux ipv6_gro_receive() + 912 vmlinux dev_gro_receive() + 1116 vmlinux napi_gro_receive() + 196 ccmni.ko ccmni_rx_callback() + 208 ccmni.ko ccmni_queue_recv_skb() + 388 ccci_dpmaif.ko dpmaif_rxq_push_thread() + 1088 vmlinux kthread() + 268 vmlinux 0xFFFFFFC08001F30C()

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/786650e644c5b1c063921799ca203c0b8670d79a	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/c0dba059b118b5206e755042b15b49368a388898	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/f920436a44295ca791ebb6dae3f4190142eec703	Patch

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	6.15
linux	linux_kernel	6.15
linux	linux_kernel	6.15
linux	linux_kernel	6.15

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/ipv4/tcp_offload.c",
            "net/ipv6/tcpv6_offload.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "c0dba059b118b5206e755042b15b49368a388898",
              "status": "affected",
              "version": "c9d1d23e5239f41700be69133a5769ac5ebc88a8",
              "versionType": "git"
            },
            {
              "lessThan": "786650e644c5b1c063921799ca203c0b8670d79a",
              "status": "affected",
              "version": "c9d1d23e5239f41700be69133a5769ac5ebc88a8",
              "versionType": "git"
            },
            {
              "lessThan": "f920436a44295ca791ebb6dae3f4190142eec703",
              "status": "affected",
              "version": "c9d1d23e5239f41700be69133a5769ac5ebc88a8",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/ipv4/tcp_offload.c",
            "net/ipv6/tcpv6_offload.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.10"
            },
            {
              "lessThan": "6.10",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.28",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.14.*",
              "status": "unaffected",
              "version": "6.14.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.15",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "302ECAAE-A0A0-4B20-8159-4BB8716F037C",
              "versionEndExcluding": "6.12.28",
              "versionStartIncluding": "6.10",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "19E5095E-5950-43EA-8E78-FC860855293F",
              "versionEndExcluding": "6.14.6",
              "versionStartIncluding": "6.13",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.15:rc1:*:*:*:*:*:*",
              "matchCriteriaId": "8D465631-2980-487A-8E65-40AE2B9F8ED1",
              "vulnerable": true
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              "matchCriteriaId": "4C9D071F-B28E-46EC-AC61-22B913390211",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.15:rc3:*:*:*:*:*:*",
              "matchCriteriaId": "13FC0DDE-E513-465E-9E81-515702D49B74",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.15:rc4:*:*:*:*:*:*",
              "matchCriteriaId": "8C7B5B0E-4EEB-48F5-B4CF-0935A7633845",
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            }
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          "negate": false,
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        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: use sock_gen_put() when sk_state is TCP_TIME_WAIT\n\nIt is possible for a pointer of type struct inet_timewait_sock to be\nreturned from the functions __inet_lookup_established() and\n__inet6_lookup_established(). This can cause a crash when the\nreturned pointer is of type struct inet_timewait_sock and\nsock_put() is called on it. The following is a crash call stack that\nshows sk-\u003esk_wmem_alloc being accessed in sk_free() during the call to\nsock_put() on a struct inet_timewait_sock pointer. To avoid this issue,\nuse sock_gen_put() instead of sock_put() when sk-\u003esk_state\nis TCP_TIME_WAIT.\n\nmrdump.ko        ipanic() + 120\nvmlinux          notifier_call_chain(nr_to_call=-1, nr_calls=0) + 132\nvmlinux          atomic_notifier_call_chain(val=0) + 56\nvmlinux          panic() + 344\nvmlinux          add_taint() + 164\nvmlinux          end_report() + 136\nvmlinux          kasan_report(size=0) + 236\nvmlinux          report_tag_fault() + 16\nvmlinux          do_tag_recovery() + 16\nvmlinux          __do_kernel_fault() + 88\nvmlinux          do_bad_area() + 28\nvmlinux          do_tag_check_fault() + 60\nvmlinux          do_mem_abort() + 80\nvmlinux          el1_abort() + 56\nvmlinux          el1h_64_sync_handler() + 124\nvmlinux        \u003e 0xFFFFFFC080011294()\nvmlinux          __lse_atomic_fetch_add_release(v=0xF2FFFF82A896087C)\nvmlinux          __lse_atomic_fetch_sub_release(v=0xF2FFFF82A896087C)\nvmlinux          arch_atomic_fetch_sub_release(i=1, v=0xF2FFFF82A896087C)\n+ 8\nvmlinux          raw_atomic_fetch_sub_release(i=1, v=0xF2FFFF82A896087C)\n+ 8\nvmlinux          atomic_fetch_sub_release(i=1, v=0xF2FFFF82A896087C) + 8\nvmlinux          __refcount_sub_and_test(i=1, r=0xF2FFFF82A896087C,\noldp=0) + 8\nvmlinux          __refcount_dec_and_test(r=0xF2FFFF82A896087C, oldp=0) + 8\nvmlinux          refcount_dec_and_test(r=0xF2FFFF82A896087C) + 8\nvmlinux          sk_free(sk=0xF2FFFF82A8960700) + 28\nvmlinux          sock_put() + 48\nvmlinux          tcp6_check_fraglist_gro() + 236\nvmlinux          tcp6_gro_receive() + 624\nvmlinux          ipv6_gro_receive() + 912\nvmlinux          dev_gro_receive() + 1116\nvmlinux          napi_gro_receive() + 196\nccmni.ko         ccmni_rx_callback() + 208\nccmni.ko         ccmni_queue_recv_skb() + 388\nccci_dpmaif.ko   dpmaif_rxq_push_thread() + 1088\nvmlinux          kthread() + 268\nvmlinux          0xFFFFFFC08001F30C()"
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net: usar sock_gen_put() cuando sk_state es TCP_TIME_WAIT Es posible que un puntero de tipo struct inet_timewait_sock sea devuelto desde las funciones __inet_lookup_established() y __inet6_lookup_established(). Esto puede causar un bloqueo cuando el puntero devuelto es de tipo struct inet_timewait_sock y se llama a sock_put() en \u00e9l. La siguiente es una pila de llamadas de bloqueo que muestra que se accede a sk-\u0026gt;sk_wmem_alloc en sk_free() durante la llamada a sock_put() en un puntero struct inet_timewait_sock. Para evitar este problema, use sock_gen_put() en lugar de sock_put() cuando sk-\u0026gt;sk_state es TCP_TIME_WAIT. mrdump.ko ipanic() + 120 vmlinux notifier_call_chain(nr_to_call=-1, nr_calls=0) + 132 vmlinux atomic_notifier_call_chain(val=0) + 56 vmlinux panic() + 344 vmlinux add_taint() + 164 vmlinux end_report() + 136 vmlinux kasan_report(size=0) + 236 vmlinux report_tag_fault() + 16 vmlinux do_tag_recovery() + 16 vmlinux __do_kernel_fault() + 88 vmlinux do_bad_area() + 28 vmlinux do_tag_check_fault() + 60 vmlinux do_mem_abort() + 80 vmlinux el1_abort() + 56 vmlinux el1h_64_sync_handler() + 124 vmlinux \u0026gt; 0xFFFFFFC080011294() vmlinux __lse_atomic_fetch_add_release(v=0xF2FFFF82A896087C) vmlinux __lse_atomic_fetch_sub_release(v=0xF2FFFF82A896087C) vmlinux arch_atomic_fetch_sub_release(i=1, v=0xF2FFFF82A896087C) + 8 vmlinux raw_atomic_fetch_sub_release(i=1, v=0xF2FFFF82A896087C) + 8 vmlinux atomic_fetch_sub_release(i=1, v=0xF2FFFF82A896087C) + 8 vmlinux __refcount_sub_and_test(i=1, r=0xF2FFFF82A896087C, p anterior=0) + 8 vmlinux __refcount_dec_and_test(r=0xF2FFFF82A896087C, p anterior=0) + 8 vmlinux refcount_dec_and_test(r=0xF2FFFF82A896087C) + 8 vmlinux sk_free(sk=0xF2FFFF82A8960700) + 28 vmlinux sock_put() + 48 vmlinux tcp6_check_fraglist_gro() + 236 vmlinux tcp6_gro_receive() + 624 vmlinux ipv6_gro_receive() + 912 vmlinux dev_gro_receive() + 1116 vmlinux napi_gro_receive() + 196 ccmni.ko ccmni_rx_callback() + 208 ccmni.ko ccmni_queue_recv_skb() + 388 ccci_dpmaif.ko dpmaif_rxq_push_thread() + 1088 vmlinux kthread() + 268 vmlinux 0xFFFFFFC08001F30C()"
    }
  ],
  "id": "CVE-2025-37894",
  "lastModified": "2026-07-30T06:22:30.230",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 9.8,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.9,
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
      },
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2025-05-20T16:15:25.760",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/786650e644c5b1c063921799ca203c0b8670d79a"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
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      "url": "https://git.kernel.org/stable/c/c0dba059b118b5206e755042b15b49368a388898"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
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      "url": "https://git.kernel.org/stable/c/f920436a44295ca791ebb6dae3f4190142eec703"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-476"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

CVE-2025-37894 (GCVE-0-2025-37894)

Vulnerability from cvelistv5 – Published: 2025-05-20 15:21 – Updated: 2026-08-05 11:58

Title

net: use sock_gen_put() when sk_state is TCP_TIME_WAIT

Summary

Severity

9.8 (Critical)


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

Assigner

Linux CNA under the mitre root

CNA scorecard D 53/100 over 7056 records in the last 180 days details

References

3 references

URL	Tags
https://git.kernel.org/stable/c/c0dba059b118b5206…
https://git.kernel.org/stable/c/786650e644c5b1c06…
https://git.kernel.org/stable/c/f920436a44295ca79…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: c9d1d23e5239f41700be69133a5769ac5ebc88a8 , < c0dba059b118b5206e755042b15b49368a388898 (git) Affected: c9d1d23e5239f41700be69133a5769ac5ebc88a8 , < 786650e644c5b1c063921799ca203c0b8670d79a (git) Affected: c9d1d23e5239f41700be69133a5769ac5ebc88a8 , < f920436a44295ca791ebb6dae3f4190142eec703 (git)
Linux	Linux	Affected: 6.10 Unaffected: 0 , < 6.10 (semver) Unaffected: 6.12.28 , ≤ 6.12.* (semver) Unaffected: 6.14.6 , ≤ 6.14.* (semver) Unaffected: 6.15 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/ipv4/tcp_offload.c",
            "net/ipv6/tcpv6_offload.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "c0dba059b118b5206e755042b15b49368a388898",
              "status": "affected",
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              "versionType": "git"
            },
            {
              "lessThan": "786650e644c5b1c063921799ca203c0b8670d79a",
              "status": "affected",
              "version": "c9d1d23e5239f41700be69133a5769ac5ebc88a8",
              "versionType": "git"
            },
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              "status": "affected",
              "version": "c9d1d23e5239f41700be69133a5769ac5ebc88a8",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/ipv4/tcp_offload.c",
            "net/ipv6/tcpv6_offload.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.10"
            },
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              "lessThan": "6.10",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
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              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.14.*",
              "status": "unaffected",
              "version": "6.14.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.15",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
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                {
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                  "vulnerable": true
                },
                {
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                  "versionStartIncluding": "6.10",
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                },
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                }
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: use sock_gen_put() when sk_state is TCP_TIME_WAIT\n\nIt is possible for a pointer of type struct inet_timewait_sock to be\nreturned from the functions __inet_lookup_established() and\n__inet6_lookup_established(). This can cause a crash when the\nreturned pointer is of type struct inet_timewait_sock and\nsock_put() is called on it. The following is a crash call stack that\nshows sk-\u003esk_wmem_alloc being accessed in sk_free() during the call to\nsock_put() on a struct inet_timewait_sock pointer. To avoid this issue,\nuse sock_gen_put() instead of sock_put() when sk-\u003esk_state\nis TCP_TIME_WAIT.\n\nmrdump.ko        ipanic() + 120\nvmlinux          notifier_call_chain(nr_to_call=-1, nr_calls=0) + 132\nvmlinux          atomic_notifier_call_chain(val=0) + 56\nvmlinux          panic() + 344\nvmlinux          add_taint() + 164\nvmlinux          end_report() + 136\nvmlinux          kasan_report(size=0) + 236\nvmlinux          report_tag_fault() + 16\nvmlinux          do_tag_recovery() + 16\nvmlinux          __do_kernel_fault() + 88\nvmlinux          do_bad_area() + 28\nvmlinux          do_tag_check_fault() + 60\nvmlinux          do_mem_abort() + 80\nvmlinux          el1_abort() + 56\nvmlinux          el1h_64_sync_handler() + 124\nvmlinux        \u003e 0xFFFFFFC080011294()\nvmlinux          __lse_atomic_fetch_add_release(v=0xF2FFFF82A896087C)\nvmlinux          __lse_atomic_fetch_sub_release(v=0xF2FFFF82A896087C)\nvmlinux          arch_atomic_fetch_sub_release(i=1, v=0xF2FFFF82A896087C)\n+ 8\nvmlinux          raw_atomic_fetch_sub_release(i=1, v=0xF2FFFF82A896087C)\n+ 8\nvmlinux          atomic_fetch_sub_release(i=1, v=0xF2FFFF82A896087C) + 8\nvmlinux          __refcount_sub_and_test(i=1, r=0xF2FFFF82A896087C,\noldp=0) + 8\nvmlinux          __refcount_dec_and_test(r=0xF2FFFF82A896087C, oldp=0) + 8\nvmlinux          refcount_dec_and_test(r=0xF2FFFF82A896087C) + 8\nvmlinux          sk_free(sk=0xF2FFFF82A8960700) + 28\nvmlinux          sock_put() + 48\nvmlinux          tcp6_check_fraglist_gro() + 236\nvmlinux          tcp6_gro_receive() + 624\nvmlinux          ipv6_gro_receive() + 912\nvmlinux          dev_gro_receive() + 1116\nvmlinux          napi_gro_receive() + 196\nccmni.ko         ccmni_rx_callback() + 208\nccmni.ko         ccmni_queue_recv_skb() + 388\nccci_dpmaif.ko   dpmaif_rxq_push_thread() + 1088\nvmlinux          kthread() + 268\nvmlinux          0xFFFFFFC08001F30C()"
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 9.8,
            "baseSeverity": "CRITICAL",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:N - The vulnerable code executes in the GRO packet-receive softirq path (`napi_gro_receive` \u2192 `ipv4/ipv6_gro_receive` \u2192 `tcp4/6_gro_receive` \u2192 `tcp4/6_check_fraglist_gro`), triggered purely by TCP segments arriving from the network. The reported real-world crash occurred on a modem/WAN interface receiving internet traffic.\nAC:L - The attacker controls both sides of the race \u2014 it creates the TIME_WAIT sockets by opening and closing connections, deterministically tears them down on demand by sending an RST or out-of-window SYN for the same 4-tuple (`TCP_TW_RST`/`TCP_TW_SYN` \u2192 `inet_twsk_deschedule_put()`), and concurrently floods matching segments that drive the GRO lookup on other RX queues, so the final `sock_put()` reliably lands on a dying twsk. It can also groom the dedicated `tw_sock_TCP` slab to place a chosen victim object next to the out-of-bounds decrement.\nPR:N - No credentials or privileges of any kind are needed \u2014 GRO processing happens in softirq on raw received packets long before any socket-level authentication or delivery, and creating TIME_WAIT state only requires connecting to any reachable TCP port or emitting traffic through the box.\nUI:N - Exploitation is fully driven by attacker-transmitted packets; no local user action, mount, or file access is required.\nS:U - The out-of-bounds decrement, the potential indirect call, and the resulting corruption are all confined to the kernel\u0027s own memory and security authority, with no crossing into a hypervisor, IOMMU, or other security scope.\nC:H - The mistyped free reads far past the 264-byte timewait object \u2014 `sk_prot_creator` at +600 and `sk_destruct` at +736 \u2014 and the corrupted neighbouring `hlist_nulls` pointers turn subsequent ehash walks into reads of attacker-influenced addresses, giving a path to arbitrary kernel memory disclosure.\nI:H - `sk_free()` performs an atomic 32-bit read-modify-write 116 bytes out of bounds into an adjacent live `tcp_timewait_sock`, corrupting its hash-list pointers, which are later written through by `sk_nulls_del_node_init_rcu()`; if the OOB word reads 1, `__sk_destruct()` additionally makes an indirect call through a function pointer sourced from out-of-bounds heap data, yielding a control-flow hijack primitive.\nA:H - The bug was reported as a confirmed kernel panic (KASAN/MTE tag-check fault in `sk_free()` \u2192 `panic()`), and a remote unauthenticated attacker can retrigger the out-of-bounds refcount decrement repeatedly, crashing the machine at will."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T11:58:09.042Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/c0dba059b118b5206e755042b15b49368a388898"
        },
        {
          "url": "https://git.kernel.org/stable/c/786650e644c5b1c063921799ca203c0b8670d79a"
        },
        {
          "url": "https://git.kernel.org/stable/c/f920436a44295ca791ebb6dae3f4190142eec703"
        }
      ],
      "title": "net: use sock_gen_put() when sk_state is TCP_TIME_WAIT",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-37894",
    "datePublished": "2025-05-20T15:21:31.283Z",
    "dateReserved": "2025-04-16T04:51:23.964Z",
    "dateUpdated": "2026-08-05T11:58:09.042Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

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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.

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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.
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