{
  "cveId": "CVE-2026-64188",
  "url": "https://patchblox.com/security/cve/CVE-2026-64188",
  "summary": "CVE-2026-64188 is fixed in 16 products on 1 platform, first by DEBIAN-CVE-2026-64188, released July 21, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "net: qualcomm: rmnet: fix endpoint use-after-free in rmnet_dellink()",
  "description": "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 -\u003E __rmnet_map_ingress_handler) may still hold a reference to the endpoint and dereference ep-\u003Eegress_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\u002B #4 PREEMPTLAZY   RIP: 0010:rmnet_vnd_rx_fixup (rmnet_vnd.c:27)   Call Trace:    \u003CTASK\u003E    __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)    \u003C/TASK\u003E  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-\u003Eegress_dev to NULL during the grace period, creating a data race with lockless readers.",
  "published": "2026-07-20T17:18:21Z",
  "severity": "Moderate",
  "cvss": 7.8,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
  "epss": 0.00117,
  "epssPercentile": 0.01697,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-64188",
  "fixes": [
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      "platform": "linux",
      "product": "dtb-aarch64",
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      "fix": "OPENSUSE-SU-2026:21555-1",
      "url": "https://patchblox.com/security/fix/linux/opensuse-su-2026-21555-1",
      "released": "2026-08-12T01:09:28Z"
    },
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      "product": "kernel-64kb",
      "release": "opensuse-leap 16.0",
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      "fix": "OPENSUSE-SU-2026:21555-1",
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      "fix": "SUSE-SU-2026:4254-1",
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      "released": "2026-10-07T22:31:36Z"
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      "fix": "SUSE-SU-2026:23231-1",
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      "released": "2026-08-11T21:26:34Z"
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  "noFixYet": [],
  "dataAsOf": "2026-11-08T19:12:23Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
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}