FKIE_CVE-2026-23058

Vulnerability from fkie_nvd - Published: 2026-02-04 17:16 - Updated: 2026-06-17 10:20
Severity
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.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0ce73a0eb5a27070957b67fd74059b6da89cc516
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/46a191ff7eeec33a2ccb2a1bfea34e18fbc5dc1a
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/61e6d3674c3d1da1475dc207b3e75c55d678d18e
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/68c62b3e53901846b5f68c5a8bade72a5d9c0b87
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e2c71030dc464d437110bcfb367c493fd402bddb
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e9410fdd4d5f7eaa6526d8c80e83029d7c86a8e8
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f48eabd15194b216030b32445f44230df95f5fe0
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/can/usb/ems_usb.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "e2c71030dc464d437110bcfb367c493fd402bddb",
              "status": "affected",
              "version": "702171adeed3607ee9603ec30ce081411e36ae42",
              "versionType": "git"
            },
            {
              "lessThan": "f48eabd15194b216030b32445f44230df95f5fe0",
              "status": "affected",
              "version": "702171adeed3607ee9603ec30ce081411e36ae42",
              "versionType": "git"
            },
            {
              "lessThan": "61e6d3674c3d1da1475dc207b3e75c55d678d18e",
              "status": "affected",
              "version": "702171adeed3607ee9603ec30ce081411e36ae42",
              "versionType": "git"
            },
            {
              "lessThan": "e9410fdd4d5f7eaa6526d8c80e83029d7c86a8e8",
              "status": "affected",
              "version": "702171adeed3607ee9603ec30ce081411e36ae42",
              "versionType": "git"
            },
            {
              "lessThan": "46a191ff7eeec33a2ccb2a1bfea34e18fbc5dc1a",
              "status": "affected",
              "version": "702171adeed3607ee9603ec30ce081411e36ae42",
              "versionType": "git"
            },
            {
              "lessThan": "68c62b3e53901846b5f68c5a8bade72a5d9c0b87",
              "status": "affected",
              "version": "702171adeed3607ee9603ec30ce081411e36ae42",
              "versionType": "git"
            },
            {
              "lessThan": "0ce73a0eb5a27070957b67fd74059b6da89cc516",
              "status": "affected",
              "version": "702171adeed3607ee9603ec30ce081411e36ae42",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/can/usb/ems_usb.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "2.6.32"
            },
            {
              "lessThan": "2.6.32",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.249",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.199",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.162",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.122",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.68",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.8",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.19",
              "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\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",
      "url": "https://git.kernel.org/stable/c/0ce73a0eb5a27070957b67fd74059b6da89cc516"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/46a191ff7eeec33a2ccb2a1bfea34e18fbc5dc1a"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/61e6d3674c3d1da1475dc207b3e75c55d678d18e"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/68c62b3e53901846b5f68c5a8bade72a5d9c0b87"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/e2c71030dc464d437110bcfb367c493fd402bddb"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/e9410fdd4d5f7eaa6526d8c80e83029d7c86a8e8"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/f48eabd15194b216030b32445f44230df95f5fe0"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Deferred"
}


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