CVE-2026-23031 (GCVE-0-2026-23031)

Vulnerability from cvelistv5 – Published: 2026-01-31 11:42 – Updated: 2026-06-02 13:00
VLAI
Title
can: gs_usb: gs_usb_receive_bulk_callback(): fix URB memory leak
Summary
In the Linux kernel, the following vulnerability has been resolved: can: gs_usb: gs_usb_receive_bulk_callback(): fix URB memory leak In gs_can_open(), the URBs for USB-in transfers are allocated, added to the parent->rx_submitted anchor and submitted. In the complete callback gs_usb_receive_bulk_callback(), the URB is processed and resubmitted. In gs_can_close() the URBs are freed by calling usb_kill_anchored_urbs(parent->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 gs_can_close(). Fix the memory leak by anchoring the URB in the gs_usb_receive_bulk_callback() to the parent->rx_submitted anchor.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: d08e973a77d128b25e01a08c34d89593fdf222da , < 9c151898cc259a7784be60ba38664f42ede39b31 (git)
Affected: d08e973a77d128b25e01a08c34d89593fdf222da , < ec5ccc2af9e5b045671f3f604b57512feda8bcc5 (git)
Affected: d08e973a77d128b25e01a08c34d89593fdf222da , < f905bcfa971edb89e398c98957838d8c6381c0c7 (git)
Affected: d08e973a77d128b25e01a08c34d89593fdf222da , < 08624b7206ddb9148eeffc2384ebda2c47b6d1e9 (git)
Affected: d08e973a77d128b25e01a08c34d89593fdf222da , < 9f669a38ca70839229b7ba0f851820850a2fe1f7 (git)
Affected: d08e973a77d128b25e01a08c34d89593fdf222da , < 7352e1d5932a0e777e39fa4b619801191f57e603 (git)
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Linux Linux Affected: 3.16
Unaffected: 0 , < 3.16 (semver)
Unaffected: 5.15.203 , ≤ 5.15.* (semver)
Unaffected: 6.1.162 , ≤ 6.1.* (semver)
Unaffected: 6.6.122 , ≤ 6.6.* (semver)
Unaffected: 6.12.67 , ≤ 6.12.* (semver)
Unaffected: 6.18.7 , ≤ 6.18.* (semver)
Unaffected: 6.19 , ≤ * (original_commit_for_fix)
Create a notification for this product.
Siemens RUGGEDCOM RST2428P Affected: 0 , < V4.0 (custom)
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Show details on NVD website
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This means that once an\\nin-URB has been completed, it is no longer anchored and is ultimately not\\nreleased in gs_can_close().\\n\\nFix the memory leak by anchoring the URB in the\\ngs_usb_receive_bulk_callback() to the parent-\u003erx_submitted anchor.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\\n\\ncan: gs_usb: gs_usb_receive_bulk_callback(): corregir fuga de memoria de URB\\n\\nEn gs_can_open(), los URB para transferencias USB de entrada son asignados, a\u00f1adidos al ancla parent-\u0026gt;rx_submitted y enviados. En la funci\u00f3n de devoluci\u00f3n de llamada completa gs_usb_receive_bulk_callback(), el URB es procesado y reenviado. En gs_can_close(), los URB son liberados llamando a usb_kill_anchored_urbs(parent-\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 gs_can_close().\\n\\nCorregir la fuga de memoria anclando el URB en gs_usb_receive_bulk_callback() al ancla parent-\u0026gt;rx_submitted.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/net/can/usb/gs_usb.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"d08e973a77d128b25e01a08c34d89593fdf222da\",\"lessThan\":\"9c151898cc259a7784be60ba38664f42ede39b31\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"d08e973a77d128b25e01a08c34d89593fdf222da\",\"lessThan\":\"ec5ccc2af9e5b045671f3f604b57512feda8bcc5\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"d08e973a77d128b25e01a08c34d89593fdf222da\",\"lessThan\":\"f905bcfa971edb89e398c98957838d8c6381c0c7\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"d08e973a77d128b25e01a08c34d89593fdf222da\",\"lessThan\":\"08624b7206ddb9148eeffc2384ebda2c47b6d1e9\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"d08e973a77d128b25e01a08c34d89593fdf222da\",\"lessThan\":\"9f669a38ca70839229b7ba0f851820850a2fe1f7\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"d08e973a77d128b25e01a08c34d89593fdf222da\",\"lessThan\":\"7352e1d5932a0e777e39fa4b619801191f57e603\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/net/can/usb/gs_usb.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"3.16\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"3.16\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.203\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.162\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.122\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.67\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.7\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.19\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]},{\"source\":\"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e\",\"affectedData\":[{\"vendor\":\"Siemens\",\"product\":\"RUGGEDCOM RST2428P\",\"defaultStatus\":\"unknown\",\"versions\":[{\"version\":\"0\",\"lessThan\":\"V4.0\",\"versionType\":\"custom\",\"status\":\"affected\"}]}]}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/08624b7206ddb9148eeffc2384ebda2c47b6d1e9\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/7352e1d5932a0e777e39fa4b619801191f57e603\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/9c151898cc259a7784be60ba38664f42ede39b31\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/9f669a38ca70839229b7ba0f851820850a2fe1f7\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/ec5ccc2af9e5b045671f3f604b57512feda8bcc5\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/f905bcfa971edb89e398c98957838d8c6381c0c7\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://cert-portal.siemens.com/productcert/html/ssa-253495.html\",\"source\":\"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e\"}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-06-28T11:19:57+00:00",
      "cve": "CVE-2026-23031",
      "id": "CVE-2026-23031",
      "initial_release_date": "2026-01-31T00:00:00+00:00",
      "product_status:known_affected": "184",
      "product_status:known_not_affected": "90",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: Linux kernel: Memory leak in gs_usb module can lead to denial of service via improper USB Request Block handling.",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-23031.json",
      "version": "3"
    }
  }
}



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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

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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.
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  • 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.


Detection rules are retrieved from Rulezet.