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pmdomain: bcm: bcm2835-power: Increase ASB control timeout

Type: advisorySources: OSV

In the Linux kernel, the following vulnerability has been resolved: pmdomain: bcm: bcm2835-power: Increase ASB control timeout The bcm2835_asb_control() function uses a tight polling loop to wait for the ASB bridge to acknowledge a request. During intensive workloads, this handshake intermittently fails for V3D's master ASB on BCM2711, resulting in "Failed to disable ASB master for v3d" errors during runtime PM suspend. As a consequence, the failed power-off leaves V3D in a broken state, leading to bus faults or system hangs on later accesses. As the timeout is insufficient in some scenarios, increase the polling timeout from 1us to 5us, which is still negligible in the context of a power domain transition. Also, replace the open-coded ktime_get_ns()/ cpu_relax() polling loop with readl_poll_timeout_atomic().

Products
Kernel
Affected versions
Not specified
Fixed versions
5.10.253, 5.15.203, 6.1.167, 6.12.78, 6.18.20, 6.19.10, 6.6.130
CVEs
CVE-2026-31550
Confirmed fixed CVEs
Not specified
Updated in this feed
7 Nov 2026, 11:43 UTC · Revision 1

Source evidence

pmdomain: bcm: bcm2835-power: Increase ASB control timeout

core-osv · Original source

Published 24 Apr 2026, 14:33 UTC

In the Linux kernel, the following vulnerability has been resolved: pmdomain: bcm: bcm2835-power: Increase ASB control timeout The bcm2835_asb_control() function uses a tight polling loop to wait for the ASB bridge to acknowledge a request. During intensive workloads, this handshake intermittently fails for V3D's master ASB on BCM2711, resulting in "Failed to disable ASB master for v3d" errors during runtime PM suspend. As a consequence, the failed power-off leaves V3D in a broken state, leading to bus faults or system hangs on later accesses. As the timeout is insufficient in some scenarios, increase the polling timeout from 1us to 5us, which is still negligible in the context of a power domain transition. Also, replace the open-coded ktime_get_ns()/ cpu_relax() polling loop with readl_poll_timeout_atomic().

osv:CVE-2026-31550

Kernel

Fixed versions: 5.10.253, 5.15.203, 6.1.167, 6.6.130, 6.12.78, 6.18.20, 6.19.10

Complete source record
{
  "id": "388946c846a0ec9d3053992569cf5090edb710f2d8fd151c09b2e9e4c4fe960c",
  "url": "https://osv.dev/vulnerability/CVE-2026-31550",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "pmdomain: bcm: bcm2835-power: Increase ASB control timeout",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: pmdomain: bcm: bcm2835-power: Increase ASB control timeout The bcm2835_asb_control() function uses a tight polling loop to wait for the ASB bridge to acknowledge a request. During intensive workloads, this handshake intermittently fails for V3D's master ASB on BCM2711, resulting in \"Failed to disable ASB master for v3d\" errors during runtime PM suspend. As a consequence, the failed power-off leaves V3D in a broken state, leading to bus faults or system hangs on later accesses. As the timeout is insufficient in some scenarios, increase the polling timeout from 1us to 5us, which is still negligible in the context of a power domain transition. Also, replace the open-coded ktime_get_ns()/ cpu_relax() polling loop with readl_poll_timeout_atomic().",
    "evidence": "osv:CVE-2026-31550",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
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            "value": "5.10.253",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.15.203",
            "evidence": "/affected/1/ranges"
          },
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            "evidence": "/affected/1/ranges"
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            "evidence": "/affected/1/ranges"
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          {
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            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.18.20",
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          },
          {
            "value": "6.19.10",
            "evidence": "/affected/1/ranges"
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        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
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      "aliases": [
        "CVE-2026-31550"
      ],
      "affected": [
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                  "introduced": "5.1.0"
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            {
              "type": "ECOSYSTEM",
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                  "introduced": "5.16.0"
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                  "fixed": "6.1.167"
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                  "introduced": "6.2.0"
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          "database_specific": {
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        }
      ],
      "modified": "2026-10-28T02:30:51.007829926Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/0e84e74849d2d7e9b23a09c2d5e0d9357db1ca59",
        "https://git.kernel.org/stable/c/18605b1b936b66b1f34dcf8e9ad4f1fbcf7a7c13",
        "https://git.kernel.org/stable/c/572f17180f26619809b8e0593d926762aa8660ff",
        "https://git.kernel.org/stable/c/622ab02e955c35c125ff2b65d8327b2c52db8758",
        "https://git.kernel.org/stable/c/9443202d91388026dbf7312972a74fbfd27ee82f",
        "https://git.kernel.org/stable/c/b826d2c0b0ecb844c84431ba6b502e744f5d919a",
        "https://git.kernel.org/stable/c/c5e734f6a0740dce92e7c919e632cb43fa5d4e53",
        "https://git.kernel.org/stable/c/ea4fa54b83bb2e4a21e9026824bfe271b1a6ee1e",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31550.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-31550",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31550.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-31550",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 519171,
  "published_at": "2026-04-24T14:33:17.508+00:00"
}