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net/mlx5e: Fix HV VHCA stats agent registration race

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: net/mlx5e: Fix HV VHCA stats agent registration race mlx5e_hv_vhca_stats_create() registers the stats agent through mlx5_hv_vhca_agent_create(). The helper publishes the agent in hv_vhca->agents[type] under agents_lock and immediately schedules an asynchronous control invalidation on the HV VHCA workqueue before returning to mlx5e. The asynchronous invalidation invokes the control agent's invalidate callback, which reads the hypervisor control block and forwards the command to mlx5e_hv_vhca_stats_control(). That callback may either: - call cancel_delayed_work_sync(&priv->stats_agent.work), or - call queue_delayed_work(priv->wq, &sagent->work, sagent->delay). However, the delayed_work and priv->stats_agent.agent are only initialized after mlx5_hv_vhca_agent_create() returns to mlx5e: agent = mlx5_hv_vhca_agent_create(...); /* publish + invalidate */ ... priv->stats_agent.agent = agent; /* too late */ INIT_DELAYED_WORK(&priv->stats_agent.work, ...); /* too late */ If the asynchronous control path runs before the two assignments above, it can: - Operate on an uninitialized delayed_work whose timer.function is NULL. queue_delayed_work() calls add_timer() unconditionally, so when the timer expires the timer softirq invokes a NULL function pointer. - Re-initialize the timer later through INIT_DELAYED_WORK() while the timer is already enqueued in the timer wheel, corrupting the hlist (entry.pprev cleared while the p

Announced Group revision 1
Original source ↗

CVE-2026-72342

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-72342

Linux

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Linux

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "cef35af34d6dc3792333075115c7deb7062b6e18",
        "lessThan": "b0fd6d3bb06182f19f3b59a53f57b5098b99048a",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "cef35af34d6dc3792333075115c7deb7062b6e18",
        "lessThan": "24c77044cdfcf5b8b2e9f3b620d8b9aa392d9add",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "cef35af34d6dc3792333075115c7deb7062b6e18",
        "lessThan": "e8fc3304cb67fb1d7d11ff9ef9abd5fb64e7e1d5",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "cef35af34d6dc3792333075115c7deb7062b6e18",
        "lessThan": "60fddda7207d81fea71463abd403f0b10f74f2e1",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "cef35af34d6dc3792333075115c7deb7062b6e18",
        "lessThan": "f5677797b094c3ec5fb350eb8ea7710b88a3d018",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "cef35af34d6dc3792333075115c7deb7062b6e18",
        "lessThan": "89b25b5f46f488ea3b29b3444864c76944c9075b",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "drivers/net/ethernet/mellanox/mlx5/core/en/hv_vhca_stats.c",
      "drivers/net/ethernet/mellanox/mlx5/core/lib/hv_vhca.c",
      "drivers/net/ethernet/mellanox/mlx5/core/lib/hv_vhca.h"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "5.4"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "5.4",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "6.1.178",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.145",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.97",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.40",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.1.5",
        "versionType": "semver",
        "lessThanOrEqual": "7.1.*"
      },
      {
        "status": "unaffected",
        "version": "7.2",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "drivers/net/ethernet/mellanox/mlx5/core/en/hv_vhca_stats.c",
      "drivers/net/ethernet/mellanox/mlx5/core/lib/hv_vhca.c",
      "drivers/net/ethernet/mellanox/mlx5/core/lib/hv_vhca.h"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-72342

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#33029 · Revision 1
Added to Heist Feed
Publisher date
Read the original announcement

Revision history

  1. CVE-2026-72342 · Revision 1Source updated