Vulnerability-Lookup

FKIE_CVE-2026-64188

Vulnerability from fkie_nvd - Published: 2026-07-20 17:18 - Updated: 2026-08-11 19:08

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: qualcomm: rmnet: fix endpoint use-after-free in rmnet_dellink() rmnet_dellink() removes the endpoint from the hash table with hlist_del_init_rcu() and then immediately frees it with kfree(). However, RCU readers on the receive path (rmnet_rx_handler -> __rmnet_map_ingress_handler) may still hold a reference to the endpoint and dereference ep->egress_dev after the memory has been freed. The endpoint is a kmalloc-32 object, and the stale read at offset 8 corresponds to the egress_dev pointer. BUG: unable to handle page fault for address: ffffffffde942eef Oops: 0002 [#1] SMP NOPTI CPU: 1 UID: 0 PID: 137 Comm: poc_write Not tainted 7.0.0+ #4 PREEMPTLAZY RIP: 0010:rmnet_vnd_rx_fixup (rmnet_vnd.c:27) Call Trace: <TASK> __rmnet_map_ingress_handler (rmnet_handlers.c:48 rmnet_handlers.c:101) rmnet_rx_handler (rmnet_handlers.c:129 rmnet_handlers.c:235) __netif_receive_skb_core.constprop.0 (net/core/dev.c:6096) __netif_receive_skb_one_core (net/core/dev.c:6208) netif_receive_skb (net/core/dev.c:6467) tun_get_user (drivers/net/tun.c:1955) tun_chr_write_iter (drivers/net/tun.c:2003) vfs_write (fs/read_write.c:688) ksys_write (fs/read_write.c:740) </TASK> Add an rcu_head field to struct rmnet_endpoint and replace kfree() with kfree_rcu() so the endpoint memory remains valid through the RCU grace period. Also remove the rmnet_vnd_dellink() call and inline only the nr_rmnet_devs decrement, since rmnet_vnd_dellink() would set ep->egress_dev to NULL during the grace period, creating a data race with lockless readers.

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/1078ae8175777e80c9637996fb4a46c55f0ce576	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/310b93246bfec7d4452507e0c15477377ed9f025	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/41e06fcc5df0774d212e70c5b503fc769492bce3	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/8b17adf6d4fb6bf61fa4c3f58366a7c082799a71	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/9918698cf3aee4032e12bb42fd5a951dc465339b	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/c4e676c3505c5058922dc1a6f1ded795f6758135	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/d00c953a8f69921f484b629801766da68f27f658	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/f193e38cb257d033060b63f1cfd94af076b3a2ab	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	*
linux	linux_kernel	7.1
linux	linux_kernel	7.1
linux	linux_kernel	7.1
linux	linux_kernel	7.1

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/qualcomm/rmnet/rmnet_config.c",
            "drivers/net/ethernet/qualcomm/rmnet/rmnet_config.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "status": "affected",
              "version": "ceed73a2cf4aff2921802aa3d21d45280677547d",
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            },
            {
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              "versionType": "git"
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          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/qualcomm/rmnet/rmnet_config.c",
            "drivers/net/ethernet/qualcomm/rmnet/rmnet_config.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.14"
            },
            {
              "lessThan": "4.14",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.260",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.211",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.177",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.144",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.95",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.37",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.14",
              "versionType": "semver"
            },
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              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
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              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "D318E3C0-D1DF-4C9C-9920-58D04CC69BE8",
              "versionEndExcluding": "5.10.260",
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            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "4E206B86-E0E3-4394-A93F-39F2D50A8AA8",
              "versionEndExcluding": "6.12.95",
              "versionStartIncluding": "6.7",
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            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "E08ACB05-518A-4D61-A6C4-268D1BB6BF46",
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              "versionStartIncluding": "6.13",
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            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:*",
              "matchCriteriaId": "B1EF7059-E670-45F4-B422-54C40FA86390",
              "vulnerable": true
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            {
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              "vulnerable": true
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            {
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              "matchCriteriaId": "E5910A9D-F60A-409A-B486-FE66BFEBA9B9",
              "vulnerable": true
            }
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          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: qualcomm: rmnet: fix endpoint use-after-free in rmnet_dellink()\n\nrmnet_dellink() removes the endpoint from the hash table with\nhlist_del_init_rcu() and then immediately frees it with kfree(). However,\nRCU readers on the receive path (rmnet_rx_handler -\u003e\n__rmnet_map_ingress_handler) may still hold a reference to the endpoint and\ndereference ep-\u003eegress_dev after the memory has been freed. The endpoint is\na kmalloc-32 object, and the stale read at offset 8 corresponds to the\negress_dev pointer.\n\n  BUG: unable to handle page fault for address: ffffffffde942eef\n  Oops: 0002 [#1] SMP NOPTI\n  CPU: 1 UID: 0 PID: 137 Comm: poc_write Not tainted 7.0.0+ #4 PREEMPTLAZY\n  RIP: 0010:rmnet_vnd_rx_fixup (rmnet_vnd.c:27)\n  Call Trace:\n   \u003cTASK\u003e\n   __rmnet_map_ingress_handler (rmnet_handlers.c:48 rmnet_handlers.c:101)\n   rmnet_rx_handler (rmnet_handlers.c:129 rmnet_handlers.c:235)\n   __netif_receive_skb_core.constprop.0 (net/core/dev.c:6096)\n   __netif_receive_skb_one_core (net/core/dev.c:6208)\n   netif_receive_skb (net/core/dev.c:6467)\n   tun_get_user (drivers/net/tun.c:1955)\n   tun_chr_write_iter (drivers/net/tun.c:2003)\n   vfs_write (fs/read_write.c:688)\n   ksys_write (fs/read_write.c:740)\n   \u003c/TASK\u003e\n\nAdd an rcu_head field to struct rmnet_endpoint and replace kfree() with\nkfree_rcu() so the endpoint memory remains valid through the RCU grace\nperiod. Also remove the rmnet_vnd_dellink() call and inline only the\nnr_rmnet_devs decrement, since rmnet_vnd_dellink() would set\nep-\u003eegress_dev to NULL during the grace period, creating a data race\nwith lockless readers."
    }
  ],
  "id": "CVE-2026-64188",
  "lastModified": "2026-08-11T19:08:45.213",
  "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"
      }
    ]
  },
  "published": "2026-07-20T17:18:21.853",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/1078ae8175777e80c9637996fb4a46c55f0ce576"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/310b93246bfec7d4452507e0c15477377ed9f025"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/41e06fcc5df0774d212e70c5b503fc769492bce3"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/8b17adf6d4fb6bf61fa4c3f58366a7c082799a71"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/9918698cf3aee4032e12bb42fd5a951dc465339b"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/c4e676c3505c5058922dc1a6f1ded795f6758135"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/d00c953a8f69921f484b629801766da68f27f658"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/f193e38cb257d033060b63f1cfd94af076b3a2ab"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-416"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

CVE-2026-64188 (GCVE-0-2026-64188)

Vulnerability from cvelistv5 – Published: 2026-07-20 16:27 – Updated: 2026-08-05 12:39

Title

net: qualcomm: rmnet: fix endpoint use-after-free in rmnet_dellink()

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 CNA under the mitre root

CNA scorecard D 53/100 over 7061 records in the last 180 days details

References

8 references

URL	Tags
https://git.kernel.org/stable/c/c4e676c3505c50589…
https://git.kernel.org/stable/c/9918698cf3aee4032…
https://git.kernel.org/stable/c/310b93246bfec7d44…
https://git.kernel.org/stable/c/1078ae8175777e80c…
https://git.kernel.org/stable/c/41e06fcc5df0774d2…
https://git.kernel.org/stable/c/8b17adf6d4fb6bf61…
https://git.kernel.org/stable/c/f193e38cb257d0330…
https://git.kernel.org/stable/c/d00c953a8f69921f4…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: ceed73a2cf4aff2921802aa3d21d45280677547d , < c4e676c3505c5058922dc1a6f1ded795f6758135 (git) Affected: ceed73a2cf4aff2921802aa3d21d45280677547d , < 9918698cf3aee4032e12bb42fd5a951dc465339b (git) Affected: ceed73a2cf4aff2921802aa3d21d45280677547d , < 310b93246bfec7d4452507e0c15477377ed9f025 (git) Affected: ceed73a2cf4aff2921802aa3d21d45280677547d , < 1078ae8175777e80c9637996fb4a46c55f0ce576 (git) Affected: ceed73a2cf4aff2921802aa3d21d45280677547d , < 41e06fcc5df0774d212e70c5b503fc769492bce3 (git) Affected: ceed73a2cf4aff2921802aa3d21d45280677547d , < 8b17adf6d4fb6bf61fa4c3f58366a7c082799a71 (git) Affected: ceed73a2cf4aff2921802aa3d21d45280677547d , < f193e38cb257d033060b63f1cfd94af076b3a2ab (git) Affected: ceed73a2cf4aff2921802aa3d21d45280677547d , < d00c953a8f69921f484b629801766da68f27f658 (git)
Linux	Linux	Affected: 4.14 Unaffected: 0 , < 4.14 (semver) Unaffected: 5.10.260 , ≤ 5.10.* (semver) Unaffected: 5.15.211 , ≤ 5.15.* (semver) Unaffected: 6.1.177 , ≤ 6.1.* (semver) Unaffected: 6.6.144 , ≤ 6.6.* (semver) Unaffected: 6.12.95 , ≤ 6.12.* (semver) Unaffected: 6.18.37 , ≤ 6.18.* (semver) Unaffected: 7.0.14 , ≤ 7.0.* (semver) Unaffected: 7.1 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/qualcomm/rmnet/rmnet_config.c",
            "drivers/net/ethernet/qualcomm/rmnet/rmnet_config.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "c4e676c3505c5058922dc1a6f1ded795f6758135",
              "status": "affected",
              "version": "ceed73a2cf4aff2921802aa3d21d45280677547d",
              "versionType": "git"
            },
            {
              "lessThan": "9918698cf3aee4032e12bb42fd5a951dc465339b",
              "status": "affected",
              "version": "ceed73a2cf4aff2921802aa3d21d45280677547d",
              "versionType": "git"
            },
            {
              "lessThan": "310b93246bfec7d4452507e0c15477377ed9f025",
              "status": "affected",
              "version": "ceed73a2cf4aff2921802aa3d21d45280677547d",
              "versionType": "git"
            },
            {
              "lessThan": "1078ae8175777e80c9637996fb4a46c55f0ce576",
              "status": "affected",
              "version": "ceed73a2cf4aff2921802aa3d21d45280677547d",
              "versionType": "git"
            },
            {
              "lessThan": "41e06fcc5df0774d212e70c5b503fc769492bce3",
              "status": "affected",
              "version": "ceed73a2cf4aff2921802aa3d21d45280677547d",
              "versionType": "git"
            },
            {
              "lessThan": "8b17adf6d4fb6bf61fa4c3f58366a7c082799a71",
              "status": "affected",
              "version": "ceed73a2cf4aff2921802aa3d21d45280677547d",
              "versionType": "git"
            },
            {
              "lessThan": "f193e38cb257d033060b63f1cfd94af076b3a2ab",
              "status": "affected",
              "version": "ceed73a2cf4aff2921802aa3d21d45280677547d",
              "versionType": "git"
            },
            {
              "lessThan": "d00c953a8f69921f484b629801766da68f27f658",
              "status": "affected",
              "version": "ceed73a2cf4aff2921802aa3d21d45280677547d",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/qualcomm/rmnet/rmnet_config.c",
            "drivers/net/ethernet/qualcomm/rmnet/rmnet_config.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.14"
            },
            {
              "lessThan": "4.14",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.260",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.211",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.177",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.144",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.95",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.37",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.14",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.260",
                  "versionStartIncluding": "4.14",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.211",
                  "versionStartIncluding": "4.14",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.177",
                  "versionStartIncluding": "4.14",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.144",
                  "versionStartIncluding": "4.14",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.95",
                  "versionStartIncluding": "4.14",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.37",
                  "versionStartIncluding": "4.14",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0.14",
                  "versionStartIncluding": "4.14",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1",
                  "versionStartIncluding": "4.14",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: qualcomm: rmnet: fix endpoint use-after-free in rmnet_dellink()\n\nrmnet_dellink() removes the endpoint from the hash table with\nhlist_del_init_rcu() and then immediately frees it with kfree(). However,\nRCU readers on the receive path (rmnet_rx_handler -\u003e\n__rmnet_map_ingress_handler) may still hold a reference to the endpoint and\ndereference ep-\u003eegress_dev after the memory has been freed. The endpoint is\na kmalloc-32 object, and the stale read at offset 8 corresponds to the\negress_dev pointer.\n\n  BUG: unable to handle page fault for address: ffffffffde942eef\n  Oops: 0002 [#1] SMP NOPTI\n  CPU: 1 UID: 0 PID: 137 Comm: poc_write Not tainted 7.0.0+ #4 PREEMPTLAZY\n  RIP: 0010:rmnet_vnd_rx_fixup (rmnet_vnd.c:27)\n  Call Trace:\n   \u003cTASK\u003e\n   __rmnet_map_ingress_handler (rmnet_handlers.c:48 rmnet_handlers.c:101)\n   rmnet_rx_handler (rmnet_handlers.c:129 rmnet_handlers.c:235)\n   __netif_receive_skb_core.constprop.0 (net/core/dev.c:6096)\n   __netif_receive_skb_one_core (net/core/dev.c:6208)\n   netif_receive_skb (net/core/dev.c:6467)\n   tun_get_user (drivers/net/tun.c:1955)\n   tun_chr_write_iter (drivers/net/tun.c:2003)\n   vfs_write (fs/read_write.c:688)\n   ksys_write (fs/read_write.c:740)\n   \u003c/TASK\u003e\n\nAdd an rcu_head field to struct rmnet_endpoint and replace kfree() with\nkfree_rcu() so the endpoint memory remains valid through the RCU grace\nperiod. Also remove the rmnet_vnd_dellink() call and inline only the\nnr_rmnet_devs decrement, since rmnet_vnd_dellink() would set\nep-\u003eegress_dev to NULL during the grace period, creating a data race\nwith lockless readers."
        }
      ],
      "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 complete exploit path is local: attacker-written frames enter through TUN while RTM_DELLINK over NETLINK_ROUTE invokes rmnet_dellink(); remote traffic alone cannot perform the required endpoint deletion.\nAC:L - The attacker controls both sides of the race by concurrently injecting crafted MAP frames and deleting or recreating the RMNET link, allowing repeated attempts without an uncontrollable condition.\nPR:L - Deletion requires CAP_NET_ADMIN in the route socket\u0027s network namespace, which an unprivileged user can obtain through a private user and network namespace to create TUN and RMNET devices.\nUI:N - No separate victim action is required because the attacker directly performs link setup, packet injection, and deletion.\nS:U - Exploitation compromises the kernel within the same security authority and does not cross a VM, IOMMU, or comparable scope boundary.\nC:H - The freed kmalloc-32 endpoint can be reclaimed with attacker-influenced contents, making the stale egress_dev pointer usable for forged-object dereferences and access to sensitive kernel memory.\nI:H - The corrupted egress_dev pointer reaches rmnet_vnd_rx_fixup, where derived per-CPU statistics pointers are written, providing a plausible path to arbitrary memory corruption and control-flow hijacking.\nA:H - The demonstrated race causes a page fault and kernel Oops in rmnet_vnd_rx_fixup, and it can be triggered repeatedly to crash the system."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T12:39:57.703Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/c4e676c3505c5058922dc1a6f1ded795f6758135"
        },
        {
          "url": "https://git.kernel.org/stable/c/9918698cf3aee4032e12bb42fd5a951dc465339b"
        },
        {
          "url": "https://git.kernel.org/stable/c/310b93246bfec7d4452507e0c15477377ed9f025"
        },
        {
          "url": "https://git.kernel.org/stable/c/1078ae8175777e80c9637996fb4a46c55f0ce576"
        },
        {
          "url": "https://git.kernel.org/stable/c/41e06fcc5df0774d212e70c5b503fc769492bce3"
        },
        {
          "url": "https://git.kernel.org/stable/c/8b17adf6d4fb6bf61fa4c3f58366a7c082799a71"
        },
        {
          "url": "https://git.kernel.org/stable/c/f193e38cb257d033060b63f1cfd94af076b3a2ab"
        },
        {
          "url": "https://git.kernel.org/stable/c/d00c953a8f69921f484b629801766da68f27f658"
        }
      ],
      "title": "net: qualcomm: rmnet: fix endpoint use-after-free in rmnet_dellink()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-64188",
    "datePublished": "2026-07-20T16:27:47.216Z",
    "dateReserved": "2026-07-19T07:54:57.040Z",
    "dateUpdated": "2026-08-05T12:39:57.703Z",
    "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.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

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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.

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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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