{
  "cveId": "CVE-2026-53158",
  "url": "https://patchblox.com/security/cve/CVE-2026-53158",
  "summary": "CVE-2026-53158 is fixed in 16 products on 1 platform, first by DEBIAN-CVE-2026-53158, released June 25, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  misc: fastrpc: Fix NULL pointer dereference in r...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  misc: fastrpc: Fix NULL pointer dereference in rpmsg callback  A NULL pointer dereference was observed on Hawi at boot when the DSP sends a glink message before fastrpc_rpmsg_probe() has completed initialization:    Unable to handle kernel NULL pointer dereference at virtual address 0000000000000178   pc : _raw_spin_lock_irqsave\u002B0x34/0x8c   lr : fastrpc_rpmsg_callback\u002B0x3c/0xcc [fastrpc]   ...   Call trace:    _raw_spin_lock_irqsave\u002B0x34/0x8c (P)    fastrpc_rpmsg_callback\u002B0x3c/0xcc [fastrpc]    qcom_glink_native_rx\u002B0x538/0x6a4    qcom_glink_smem_intr\u002B0x14/0x24 [qcom_glink_smem]  The faulting address 0x178 corresponds to the lock variable inside struct fastrpc_channel_ctx, confirming that cctx is NULL when fastrpc_rpmsg_callback() attempts to take the spinlock.  There are two issues here. First, dev_set_drvdata() is called before spin_lock_init() and idr_init(), leaving a window where the callback can retrieve a valid cctx pointer but operate on an uninitialized spinlock. Second, the rpmsg channel becomes live as soon as the driver is bound, so fastrpc_rpmsg_callback() can fire before dev_set_drvdata() is called at all, resulting in dev_get_drvdata() returning NULL.  Fix both issues by moving all cctx initialization ahead of dev_set_drvdata() so the structure is fully initialized before it becomes visible to the callback, and add a NULL check in fastrpc_rpmsg_callback() as a guard against any remaining window.",
  "published": "2026-06-25T09:16:33Z",
  "severity": "medium",
  "cvss": 5.5,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
  "epss": 0.00123,
  "epssPercentile": 0.02051,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
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      "released": "2026-08-12T01:09:28Z"
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  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T13:06:02Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}