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

Vulnerability from cvelistv5 – Published: 2026-02-04 16:07 – Updated: 2026-02-09 08:37
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
References
Impacted products
Vendor Product Version
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)
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    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)
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{
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          "product": "Linux",
          "programFiles": [
            "drivers/net/can/usb/ems_usb.c"
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              "version": "6.18.8",
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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."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-02-09T08:37:56.573Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/e2c71030dc464d437110bcfb367c493fd402bddb"
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    "cveId": "CVE-2026-23058",
    "datePublished": "2026-02-04T16:07:41.337Z",
    "dateReserved": "2026-01-13T15:37:45.952Z",
    "dateUpdated": "2026-02-09T08:37:56.573Z",
    "state": "PUBLISHED"
  },
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    "nvd": "{\"cve\":{\"id\":\"CVE-2026-23058\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-02-04T17:16:16.480\",\"lastModified\":\"2026-02-06T17:16:22.417\",\"vulnStatus\":\"Awaiting Analysis\",\"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.\"}],\"metrics\":{},\"references\":[{\"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\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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  • 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.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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