CVE-2026-23058 (GCVE-0-2026-23058)

Vulnerability from cvelistv5 – Published: 2026-02-04 16:07 – Updated: 2026-05-11 21:59
VLAI
Title
can: ems_usb: ems_usb_read_bulk_callback(): fix URB memory leak
Summary
In the Linux kernel, the following vulnerability has been resolved: can: ems_usb: ems_usb_read_bulk_callback(): fix URB memory leak Fix similar memory leak as in commit 7352e1d5932a ("can: gs_usb: gs_usb_receive_bulk_callback(): fix URB memory leak"). In ems_usb_open(), the URBs for USB-in transfers are allocated, added to the dev->rx_submitted anchor and submitted. In the complete callback ems_usb_read_bulk_callback(), the URBs are processed and resubmitted. In ems_usb_close() the URBs are freed by calling usb_kill_anchored_urbs(&dev->rx_submitted). However, this does not take into account that the USB framework unanchors the URB before the complete function is called. This means that once an in-URB has been completed, it is no longer anchored and is ultimately not released in ems_usb_close(). Fix the memory leak by anchoring the URB in the ems_usb_read_bulk_callback() to the dev->rx_submitted anchor.
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: 702171adeed3607ee9603ec30ce081411e36ae42 , < e2c71030dc464d437110bcfb367c493fd402bddb (git)
Affected: 702171adeed3607ee9603ec30ce081411e36ae42 , < f48eabd15194b216030b32445f44230df95f5fe0 (git)
Affected: 702171adeed3607ee9603ec30ce081411e36ae42 , < 61e6d3674c3d1da1475dc207b3e75c55d678d18e (git)
Affected: 702171adeed3607ee9603ec30ce081411e36ae42 , < e9410fdd4d5f7eaa6526d8c80e83029d7c86a8e8 (git)
Affected: 702171adeed3607ee9603ec30ce081411e36ae42 , < 46a191ff7eeec33a2ccb2a1bfea34e18fbc5dc1a (git)
Affected: 702171adeed3607ee9603ec30ce081411e36ae42 , < 68c62b3e53901846b5f68c5a8bade72a5d9c0b87 (git)
Affected: 702171adeed3607ee9603ec30ce081411e36ae42 , < 0ce73a0eb5a27070957b67fd74059b6da89cc516 (git)
guessed Create a notification for this product.
Linux Linux Affected: 2.6.32
Unaffected: 0 , < 2.6.32 (semver)
Unaffected: 5.10.249 , ≤ 5.10.* (semver)
Unaffected: 5.15.199 , ≤ 5.15.* (semver)
Unaffected: 6.1.162 , ≤ 6.1.* (semver)
Unaffected: 6.6.122 , ≤ 6.6.* (semver)
Unaffected: 6.12.68 , ≤ 6.12.* (semver)
Unaffected: 6.18.8 , ≤ 6.18.* (semver)
Unaffected: 6.19 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncan: ems_usb: ems_usb_read_bulk_callback(): fix URB memory leak\n\nFix similar memory leak as in commit 7352e1d5932a (\"can: gs_usb:\ngs_usb_receive_bulk_callback(): fix URB memory leak\").\n\nIn ems_usb_open(), the URBs for USB-in transfers are allocated, added to\nthe dev-\u003erx_submitted anchor and submitted. In the complete callback\nems_usb_read_bulk_callback(), the URBs are processed and resubmitted. In\nems_usb_close() the URBs are freed by calling\nusb_kill_anchored_urbs(\u0026dev-\u003erx_submitted).\n\nHowever, this does not take into account that the USB framework unanchors\nthe URB before the complete function is called. This means that once an\nin-URB has been completed, it is no longer anchored and is ultimately not\nreleased in ems_usb_close().\n\nFix the memory leak by anchoring the URB in the\nems_usb_read_bulk_callback() to the dev-\u003erx_submitted anchor."
        }
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    "cveId": "CVE-2026-23058",
    "datePublished": "2026-02-04T16:07:41.337Z",
    "dateReserved": "2026-01-13T15:37:45.952Z",
    "dateUpdated": "2026-05-11T21:59:11.271Z",
    "state": "PUBLISHED"
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            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncan: ems_usb: ems_usb_read_bulk_callback(): fix URB memory leak\n\nFix similar memory leak as in commit 7352e1d5932a (\"can: gs_usb:\ngs_usb_receive_bulk_callback(): fix URB memory leak\").\n\nIn ems_usb_open(), the URBs for USB-in transfers are allocated, added to\nthe dev-\u003erx_submitted anchor and submitted. In the complete callback\nems_usb_read_bulk_callback(), the URBs are processed and resubmitted. In\nems_usb_close() the URBs are freed by calling\nusb_kill_anchored_urbs(\u0026dev-\u003erx_submitted).\n\nHowever, this does not take into account that the USB framework unanchors\nthe URB before the complete function is called. This means that once an\nin-URB has been completed, it is no longer anchored and is ultimately not\nreleased in ems_usb_close().\n\nFix the memory leak by anchoring the URB in the\nems_usb_read_bulk_callback() to the dev-\u003erx_submitted anchor."
          },
          {
            "lang": "es",
            "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\ncan: ems_usb: ems_usb_read_bulk_callback(): corregir fuga de memoria de URB\n\nCorregir fuga de memoria similar a la del commit 7352e1d5932a (\u0027can: gs_usb: gs_usb_receive_bulk_callback(): corregir fuga de memoria de URB\u0027).\n\nEn ems_usb_open(), los URB para transferencias USB de entrada son asignados, a\u00f1adidos al ancla dev-\u0026gt;rx_submitted y enviados. En la funci\u00f3n de devoluci\u00f3n de llamada completa ems_usb_read_bulk_callback(), los URB son procesados y reenviados. En ems_usb_close() los URB son liberados llamando a usb_kill_anchored_urbs(\u0026amp;dev-\u0026gt;rx_submitted).\n\nSin embargo, esto no tiene en cuenta que el framework USB desancla el URB antes de que se llame a la funci\u00f3n completa. Esto significa que una vez que un URB de entrada ha sido completado, ya no est\u00e1 anclado y finalmente no es liberado en ems_usb_close().\n\nCorregir la fuga de memoria anclando el URB en la ems_usb_read_bulk_callback() al ancla dev-\u0026gt;rx_submitted."
          }
        ],
        "id": "CVE-2026-23058",
        "lastModified": "2026-06-17T10:20:47.223",
        "metrics": {},
        "published": "2026-02-04T17:16:16.480",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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        "vulnStatus": "Deferred"
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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-11-05T16:57:05+00:00",
      "cve": "CVE-2026-23058",
      "id": "CVE-2026-23058",
      "initial_release_date": "2026-02-04T00:00:00+00:00",
      "product_status:known_affected": "200",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: Linux kernel: Denial of Service in ems_usb CAN USB driver due to memory leak",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-23058.json",
      "version": "3"
    }
  }
}



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