CVE-2026-98903 (GCVE-0-2026-98903)

Vulnerability from cvelistv5 – Published: 2026-10-23 11:54 – Updated: 2026-10-26 06:56
VLAI
Title
mailbox: imx: Add a channel shutdown field
Summary
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->dcfg->type, cp->idx)); imx_mu_specific_rx() imx_mu_xcr_rmw(priv, IMX_MU_RCR, IMX_MU_xCR_RIEn(priv->dcfg->type, 0), 0); free_irq() The RX event remains enabled because in this short window the RX event was disabled in ->shutdown() while the interrupt was active and then enabled again by the ISR while ->shutdown waited in free_irq(). This race requires timing and if happens can be problematic on shared handlers if the "removed" channel triggers an interrupt. In this case the irq-core will shutdown the interrupt with the "nobody cared" 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.
Severity
No CVSS data available.
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 6637 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 0a67003b1985c79811160af1b01aca07cd5fbc53 , < 02273054b2e94e53065ea5644265bb9d8f7ee2a7 (git)
Affected: 0a67003b1985c79811160af1b01aca07cd5fbc53 , < 944d8509c2220a2313d4a094a646507929fb6f8d (git)
Affected: 0a67003b1985c79811160af1b01aca07cd5fbc53 , < 5ccea7eacb7786c358833634f45700365f6c1d99 (git)
guessed Create a notification for this product.
Linux Linux Affected: 5.7
Unaffected: 0 , < 5.7 (semver)
Unaffected: 6.12.111 , ≤ 6.12.* (semver)
Unaffected: 6.18.53 , ≤ 6.18.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/mailbox/imx-mailbox.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "02273054b2e94e53065ea5644265bb9d8f7ee2a7",
              "status": "affected",
              "version": "0a67003b1985c79811160af1b01aca07cd5fbc53",
              "versionType": "git"
            },
            {
              "lessThan": "944d8509c2220a2313d4a094a646507929fb6f8d",
              "status": "affected",
              "version": "0a67003b1985c79811160af1b01aca07cd5fbc53",
              "versionType": "git"
            },
            {
              "lessThan": "5ccea7eacb7786c358833634f45700365f6c1d99",
              "status": "affected",
              "version": "0a67003b1985c79811160af1b01aca07cd5fbc53",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/mailbox/imx-mailbox.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.7"
            },
            {
              "lessThan": "5.7",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.111",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.53",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.111",
                  "versionStartIncluding": "5.7",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.53",
                  "versionStartIncluding": "5.7",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2",
                  "versionStartIncluding": "5.7",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmailbox: imx: Add a channel shutdown field\n\nsashiko complained about possible teardown problem. The scenario\n\n CPU 0                              CPU 1\n  imx_mu_isr()                   imx_mu_shutdown()\n                                   imx_mu_xcr_rmw(priv, IMX_MU_RCR, 0, IMX_MU_xCR_RIEn(priv-\u003edcfg-\u003etype, cp-\u003eidx));\n    imx_mu_specific_rx()\n      imx_mu_xcr_rmw(priv, IMX_MU_RCR, IMX_MU_xCR_RIEn(priv-\u003edcfg-\u003etype, 0), 0);\n                                   free_irq()\n\nThe RX event remains enabled because in this short window the RX event\nwas disabled in -\u003eshutdown() while the interrupt was active and then\nenabled again by the ISR while -\u003eshutdown waited in free_irq().\n\nThis race requires timing and if happens can be problematic on shared\nhandlers if the \"removed\" channel triggers an interrupt. In this case\nthe irq-core will shutdown the interrupt with the \"nobody cared\"\nmessage.\n\nIntroduce imx_mu_con_priv::shutdown to signal that the channel is\nshutting down. This flag is set with the lock held (by\nimx_mu_xcr_clr_shut()). The unmask side uses imx_mu_xcr_set_act() which\nonly enables the event if the channel has not been shutdown and\nserialises on the same lock."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-26T06:56:31.630Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/02273054b2e94e53065ea5644265bb9d8f7ee2a7"
        },
        {
          "url": "https://git.kernel.org/stable/c/944d8509c2220a2313d4a094a646507929fb6f8d"
        },
        {
          "url": "https://git.kernel.org/stable/c/5ccea7eacb7786c358833634f45700365f6c1d99"
        }
      ],
      "title": "mailbox: imx: Add a channel shutdown field",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-98903",
    "datePublished": "2026-10-23T11:54:15.010Z",
    "dateReserved": "2026-09-25T10:25:14.379Z",
    "dateUpdated": "2026-10-26T06:56:31.630Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-98903",
      "date": "2026-11-06",
      "epss": "0.00205",
      "percentile": "0.10565"
    },
    "microsoft_vex": {
      "current_release_date": "2026-11-05T14:53:15.000Z",
      "cve": "CVE-2026-98903",
      "id": "msrc_CVE-2026-98903",
      "initial_release_date": "2026-10-24T01:02:18.000Z",
      "product_status:known_affected": "3",
      "product_status:under_investigation": "1",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "mailbox: imx: Add a channel shutdown field",
      "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-98903.json",
      "version": "4"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "defaultStatus": "unaffected",
                "product": "Linux",
                "programFiles": [
                  "drivers/mailbox/imx-mailbox.c"
                ],
                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                "vendor": "Linux",
                "versions": [
                  {
                    "lessThan": "02273054b2e94e53065ea5644265bb9d8f7ee2a7",
                    "status": "affected",
                    "version": "0a67003b1985c79811160af1b01aca07cd5fbc53",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "944d8509c2220a2313d4a094a646507929fb6f8d",
                    "status": "affected",
                    "version": "0a67003b1985c79811160af1b01aca07cd5fbc53",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "5ccea7eacb7786c358833634f45700365f6c1d99",
                    "status": "affected",
                    "version": "0a67003b1985c79811160af1b01aca07cd5fbc53",
                    "versionType": "git"
                  }
                ]
              },
              {
                "defaultStatus": "affected",
                "product": "Linux",
                "programFiles": [
                  "drivers/mailbox/imx-mailbox.c"
                ],
                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                "vendor": "Linux",
                "versions": [
                  {
                    "status": "affected",
                    "version": "5.7"
                  },
                  {
                    "lessThan": "5.7",
                    "status": "unaffected",
                    "version": "0",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "6.12.*",
                    "status": "unaffected",
                    "version": "6.12.111",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "6.18.*",
                    "status": "unaffected",
                    "version": "6.18.53",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "*",
                    "status": "unaffected",
                    "version": "7.2",
                    "versionType": "original_commit_for_fix"
                  }
                ]
              }
            ],
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmailbox: imx: Add a channel shutdown field\n\nsashiko complained about possible teardown problem. The scenario\n\n CPU 0                              CPU 1\n  imx_mu_isr()                   imx_mu_shutdown()\n                                   imx_mu_xcr_rmw(priv, IMX_MU_RCR, 0, IMX_MU_xCR_RIEn(priv-\u003edcfg-\u003etype, cp-\u003eidx));\n    imx_mu_specific_rx()\n      imx_mu_xcr_rmw(priv, IMX_MU_RCR, IMX_MU_xCR_RIEn(priv-\u003edcfg-\u003etype, 0), 0);\n                                   free_irq()\n\nThe RX event remains enabled because in this short window the RX event\nwas disabled in -\u003eshutdown() while the interrupt was active and then\nenabled again by the ISR while -\u003eshutdown waited in free_irq().\n\nThis race requires timing and if happens can be problematic on shared\nhandlers if the \"removed\" channel triggers an interrupt. In this case\nthe irq-core will shutdown the interrupt with the \"nobody cared\"\nmessage.\n\nIntroduce imx_mu_con_priv::shutdown to signal that the channel is\nshutting down. This flag is set with the lock held (by\nimx_mu_xcr_clr_shut()). The unmask side uses imx_mu_xcr_set_act() which\nonly enables the event if the channel has not been shutdown and\nserialises on the same lock."
          }
        ],
        "id": "CVE-2026-98903",
        "lastModified": "2026-10-26T07:17:15.670",
        "metrics": {},
        "published": "2026-10-23T12:18:24.370",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/02273054b2e94e53065ea5644265bb9d8f7ee2a7"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/5ccea7eacb7786c358833634f45700365f6c1d99"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/944d8509c2220a2313d4a094a646507929fb6f8d"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Received"
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-11-06T03:18:08+00:00",
      "cve": "CVE-2026-98903",
      "id": "CVE-2026-98903",
      "initial_release_date": "2026-10-23T00:00:00+00:00",
      "product_status:known_affected": "112",
      "product_status:known_not_affected": "91",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: mailbox: imx: Add a channel shutdown field",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98903.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "low",
      "current_release_date": "2026-10-27T00:42:53Z",
      "cve": "CVE-2026-98903",
      "id": "CVE-2026-98903",
      "initial_release_date": "2026-10-23T23:53:39Z",
      "product_status:known_affected": "158",
      "product_status:known_not_affected": "190",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-98903",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/2026/cve-2026-98903.json",
      "version": "4"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.

Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

JSON
How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.

Loading timeline…




    Related by attack behaviour

    Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.