Vulnerability-Lookup

FKIE_CVE-2025-38617

Vulnerability from fkie_nvd - Published: 2025-08-22 14:15 - Updated: 2026-10-15 22:18

Severity

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

Summary

In the Linux kernel, the following vulnerability has been resolved: net/packet: fix a race in packet_set_ring() and packet_notifier() When packet_set_ring() releases po->bind_lock, another thread can run packet_notifier() and process an NETDEV_UP event. This race and the fix are both similar to that of commit 15fe076edea7 ("net/packet: fix a race in packet_bind() and packet_notifier()"). There too the packet_notifier NETDEV_UP event managed to run while a po->bind_lock critical section had to be temporarily released. And the fix was similarly to temporarily set po->num to zero to keep the socket unhooked until the lock is retaken. The po->bind_lock in packet_set_ring and packet_notifier precede the introduction of git history.

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://blog.calif.io/p/a-race-within-a-race-exploiting-cve
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/01d3c8417b9c1b884a8a981a3b886da556512f36	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/18f13f2a83eb81be349a9757ba2141ff1da9ad73	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/7da733f117533e9b2ebbd530a22ae4028713955c	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/7de07705007c7e34995a5599aaab1d23e762d7ca	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/88caf46db8239e6471413d28aabaa6b8bd552805	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/ba2257034755ae773722f15f4c3ad1dcdad15ca9	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/e50ccfaca9e3c671cae917dcb994831a859cf588	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/f1791fd7b845bea0ce9674fcf2febee7bc87a893	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/f2e8fcfd2b1bc754920108b7f2cd75082c5a18df	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://github.com/google/security-research/pull/339
af854a3a-2127-422b-91ae-364da2661108	https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html	Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html	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	*
linux	linux_kernel	2.6.12
linux	linux_kernel	2.6.12
linux	linux_kernel	2.6.12
linux	linux_kernel	2.6.12
linux	linux_kernel	2.6.12
debian	debian_linux	11.0

JSON

To clipboard

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  "descriptions": [
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      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/packet: fix a race in packet_set_ring() and packet_notifier()\n\nWhen packet_set_ring() releases po-\u003ebind_lock, another thread can\nrun packet_notifier() and process an NETDEV_UP event.\n\nThis race and the fix are both similar to that of commit 15fe076edea7\n(\"net/packet: fix a race in packet_bind() and packet_notifier()\").\n\nThere too the packet_notifier NETDEV_UP event managed to run while a\npo-\u003ebind_lock critical section had to be temporarily released. And\nthe fix was similarly to temporarily set po-\u003enum to zero to keep\nthe socket unhooked until the lock is retaken.\n\nThe po-\u003ebind_lock in packet_set_ring and packet_notifier precede the\nintroduction of git history."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net/packet: correcci\u00f3n de una carrera en packet_set_ring() y packet_notifier(). Cuando packet_set_ring() libera po-\u0026gt;bind_lock, otro hilo puede ejecutar packet_notifier() y procesar un evento NETDEV_UP. Esta carrera y la correcci\u00f3n son similares a las del commit 15fe076edea7 (\"net/packet: correcci\u00f3n de una carrera en packet_bind() y packet_notifier()\"). En este caso, el evento NETDEV_UP de packet_notifier tambi\u00e9n se ejecut\u00f3 mientras una secci\u00f3n cr\u00edtica de po-\u0026gt;bind_lock deb\u00eda liberarse temporalmente. La correcci\u00f3n tambi\u00e9n consist\u00eda en establecer temporalmente po-\u0026gt;num en cero para mantener el socket desconectado hasta que se recupere el bloqueo. El po-\u0026gt;bind_lock en packet_set_ring y packet_notifier precede a la introducci\u00f3n del historial de Git."
    }
  ],
  "id": "CVE-2025-38617",
  "lastModified": "2026-10-15T22:18:47.480",
  "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"
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        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
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          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 4.7,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.0,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
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    "ssvcV203": [
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        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2025-38617",
          "options": [
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              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
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          "role": "CISA Coordinator",
          "timestamp": "2026-10-15T21:52:21.634455Z",
          "version": "2.0.3"
        }
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  "published": "2025-08-22T14:15:46.160",
  "references": [
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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  "vulnStatus": "Modified",
  "weaknesses": [
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          "lang": "en",
          "value": "CWE-362"
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      "source": "nvd@nist.gov",
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}

CVE-2025-38617 (GCVE-0-2025-38617)

Vulnerability from cvelistv5 – Published: 2025-08-22 13:01 – Updated: 2026-10-15 22:02

Title

net/packet: fix a race in packet_set_ring() and packet_notifier()

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 2026-10-15 21:52 UTC

Assigner

Linux CNA under the mitre root

CNA scorecard D 53/100 over 6638 records in the last 180 days details

References

13 references

URL	Tags
https://git.kernel.org/stable/c/18f13f2a83eb81be3…
https://git.kernel.org/stable/c/7da733f117533e9b2…
https://git.kernel.org/stable/c/ba2257034755ae773…
https://git.kernel.org/stable/c/7de07705007c7e349…
https://git.kernel.org/stable/c/88caf46db8239e647…
https://git.kernel.org/stable/c/f2e8fcfd2b1bc7549…
https://git.kernel.org/stable/c/e50ccfaca9e3c671c…
https://git.kernel.org/stable/c/f1791fd7b845bea0c…
https://git.kernel.org/stable/c/01d3c8417b9c1b884…
https://blog.calif.io/p/a-race-within-a-race-expl…
https://github.com/google/security-research/pull/339
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: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 18f13f2a83eb81be349a9757ba2141ff1da9ad73 (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 7da733f117533e9b2ebbd530a22ae4028713955c (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < ba2257034755ae773722f15f4c3ad1dcdad15ca9 (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 7de07705007c7e34995a5599aaab1d23e762d7ca (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 88caf46db8239e6471413d28aabaa6b8bd552805 (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < f2e8fcfd2b1bc754920108b7f2cd75082c5a18df (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < e50ccfaca9e3c671cae917dcb994831a859cf588 (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < f1791fd7b845bea0ce9674fcf2febee7bc87a893 (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 01d3c8417b9c1b884a8a981a3b886da556512f36 (git)
Linux	Linux	Affected: 2.6.12 Unaffected: 0 , < 2.6.12 (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": "2025-11-03T17:40:28.543Z",
          "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"
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      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2025-38617",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-10-15T21:52:21.634455Z",
                "version": "2.0.3"
              },
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        "providerMetadata": {
          "dateUpdated": "2026-10-15T22:02:26.912Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/packet/af_packet.c"
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          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
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              "status": "affected",
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              "versionType": "git"
            },
            {
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              "status": "affected",
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              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "01d3c8417b9c1b884a8a981a3b886da556512f36",
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              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
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          "vendor": "Linux",
          "versions": [
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              "version": "2.6.12"
            },
            {
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              "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": "2.6.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.241",
                  "versionStartIncluding": "2.6.12",
                  "vulnerable": true
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                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                {
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                  "versionEndExcluding": "6.6.102",
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                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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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\nnet/packet: fix a race in packet_set_ring() and packet_notifier()\n\nWhen packet_set_ring() releases po-\u003ebind_lock, another thread can\nrun packet_notifier() and process an NETDEV_UP event.\n\nThis race and the fix are both similar to that of commit 15fe076edea7\n(\"net/packet: fix a race in packet_bind() and packet_notifier()\").\n\nThere too the packet_notifier NETDEV_UP event managed to run while a\npo-\u003ebind_lock critical section had to be temporarily released. And\nthe fix was similarly to temporarily set po-\u003enum to zero to keep\nthe socket unhooked until the lock is retaken.\n\nThe po-\u003ebind_lock in packet_set_ring and packet_notifier precede the\nintroduction of git history."
        }
      ],
      "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 - Triggering the race requires local syscalls \u2014 creating an AF_PACKET socket, calling setsockopt(PACKET_RX_RING), and generating NETDEV_UP/NETDEV_DOWN events via netlink on a bound device. A remote peer can supply the packet data that lands in the freed ring, but cannot set up the race itself.\nAC:L - The attacker controls both sides of the race \u2014 one thread issues the PACKET_RX_RING setsockopt while another flaps the bound interface \u2014 and the unlocked window in packet_set_ring() spans a full synchronize_net() RCU grace period, making the race trivially winnable and repeatable.\nPR:L - packet_create() requires only ns_capable(net-\u003euser_ns, CAP_NET_RAW), which an unprivileged user obtains with `unshare -Urn`, along with CAP_NET_ADMIN in that namespace to create a veth/dummy device and bring it up and down. Containers with Docker\u0027s default capability set (which includes NET_RAW) also reach this directly.\nUI:N - The attacker performs every step \u2014 socket setup, ring teardown, interface flap, and packet injection \u2014 with no action from any other user.\nS:U - The corruption is confined to kernel memory within the same security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - tpacket_rcv() operates on the freed pg_vec pages and stale prb_bdqc pointers, and the reclaimed pages remain user-mmapped via packet_mmap(), giving the attacker a read window onto whatever kernel data is reallocated into them \u2014 an arbitrary kernel memory disclosure primitive.\nI:H - skb_copy_bits() and prb_fill_curr_block() write attacker-chosen packet contents and block metadata into freed ring pages after free_pg_vec(), yielding a controlled use-after-free write that is heap-sprayable into privilege escalation.\nA:H - In the simplest outcome, packet_lookup_frame() dereferences a NULL rb-\u003epg_vec and test_bit() a NULL rx_owner_map from softirq context, causing an immediate kernel oops/panic that any local user can trigger at will."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T12:03:32.785Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/18f13f2a83eb81be349a9757ba2141ff1da9ad73"
        },
        {
          "url": "https://git.kernel.org/stable/c/7da733f117533e9b2ebbd530a22ae4028713955c"
        },
        {
          "url": "https://git.kernel.org/stable/c/ba2257034755ae773722f15f4c3ad1dcdad15ca9"
        },
        {
          "url": "https://git.kernel.org/stable/c/7de07705007c7e34995a5599aaab1d23e762d7ca"
        },
        {
          "url": "https://git.kernel.org/stable/c/88caf46db8239e6471413d28aabaa6b8bd552805"
        },
        {
          "url": "https://git.kernel.org/stable/c/f2e8fcfd2b1bc754920108b7f2cd75082c5a18df"
        },
        {
          "url": "https://git.kernel.org/stable/c/e50ccfaca9e3c671cae917dcb994831a859cf588"
        },
        {
          "url": "https://git.kernel.org/stable/c/f1791fd7b845bea0ce9674fcf2febee7bc87a893"
        },
        {
          "url": "https://git.kernel.org/stable/c/01d3c8417b9c1b884a8a981a3b886da556512f36"
        },
        {
          "url": "https://blog.calif.io/p/a-race-within-a-race-exploiting-cve"
        },
        {
          "url": "https://github.com/google/security-research/pull/339"
        }
      ],
      "title": "net/packet: fix a race in packet_set_ring() and packet_notifier()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-38617",
    "datePublished": "2025-08-22T13:01:23.963Z",
    "dateReserved": "2025-04-16T04:51:24.029Z",
    "dateUpdated": "2026-10-15T22:02:26.912Z",
    "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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