{
  "cveId": "CVE-2026-98903",
  "url": "https://patchblox.com/security/cve/CVE-2026-98903",
  "summary": "CVE-2026-98903 is fixed in linux on 1 platform, first by DEBIAN-CVE-2026-98903, released October 24, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "mailbox: imx: Add a channel shutdown field",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  mailbox: imx: Add a channel shutdown field  sashiko complained about possible teardown problem. The scenario   CPU 0                              CPU 1   imx_mu_isr()                   imx_mu_shutdown()                                    imx_mu_xcr_rmw(priv, IMX_MU_RCR, 0, IMX_MU_xCR_RIEn(priv-\u003Edcfg-\u003Etype, cp-\u003Eidx));     imx_mu_specific_rx()       imx_mu_xcr_rmw(priv, IMX_MU_RCR, IMX_MU_xCR_RIEn(priv-\u003Edcfg-\u003Etype, 0), 0);                                    free_irq()  The RX event remains enabled because in this short window the RX event was disabled in -\u003Eshutdown() while the interrupt was active and then enabled again by the ISR while -\u003Eshutdown waited in free_irq().  This race requires timing and if happens can be problematic on shared handlers if the \u0022removed\u0022 channel triggers an interrupt. In this case the irq-core will shutdown the interrupt with the \u0022nobody cared\u0022 message.  Introduce imx_mu_con_priv::shutdown to signal that the channel is shutting down. This flag is set with the lock held (by imx_mu_xcr_clr_shut()). The unmask side uses imx_mu_xcr_set_act() which only enables the event if the channel has not been shutdown and serialises on the same lock.",
  "published": "2026-10-23T12:18:24Z",
  "severity": "Moderate",
  "cvss": 4.7,
  "epss": 0.00205,
  "epssPercentile": 0.10562,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-98903",
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "6.12.111-1",
      "fix": "DEBIAN-CVE-2026-98903",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-98903",
      "released": "2026-10-24T13:25:57Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "7.2.6-1",
      "fix": "DEBIAN-CVE-2026-98903",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-98903",
      "released": "2026-10-24T13:25:57Z"
    }
  ],
  "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"
  }
}