CVE-2026-23324

Local denial of service via unanchored URB

Published Mar 25, 2026 · Updated Mar 25, 2026

Resource leak in the Linux Kernel etas_es58x USB CAN driver allows local users to cause an availability-only service interrupt. The read bulk callback submits an URB before adding it to the driver's anchor, so usb_kill_anchored_urbs() can miss and leak it during cleanup. Reachability requires low-privileged local access, the affected driver path, and a cleanup race; no confidentiality or integrity impact is reported.

CVSS severity5.5
Medium
EPSS probability0.12%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource leak in the Linux Kernel etas_es58x USB CAN driver allows local users to cause an availability-only service interrupt. The read bulk callback submits an URB before adding it to the driver's anchor, so usb_kill_anchored_urbs() can miss and leak it during cleanup. Reachability requires low-privileged local access, the affected driver path, and a cleanup race; no confidentiality or integrity impact is reported.

The record

CVE
CVE-2026-23324
Published
Mar 25, 2026
Updated
Mar 25, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 25, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=5.13
  2. Affected versionversion=8537257874e949a59c834cecfd5a063e11b64b0b <18eee279e9b5bff0db1aca9475ae4bc12804f05c
  3. Affected versionversion=8537257874e949a59c834cecfd5a063e11b64b0b <2185ea6e4ebcb61d1224dc7d187c59723cb5ad59
  4. Affected versionversion=8537257874e949a59c834cecfd5a063e11b64b0b <5eaad4f768266f1f17e01232ffe2ef009f8129b7
  5. Affected versionversion=8537257874e949a59c834cecfd5a063e11b64b0b <b878444519fa03a3edd287d1963cf79ef78be2f1
  6. Affected versionversion=8537257874e949a59c834cecfd5a063e11b64b0b <b8f9ca88253574638bcff38900a4c28d570b1919
  7. Affected versionversion=8537257874e949a59c834cecfd5a063e11b64b0b <f6e90c113c92e83fc0963d5e60e16b0e8a268981

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=5.13; version=8537257874e949a59c834cecfd5a063e11b64b0b <18eee279e9b5bff0db1aca9475ae4bc12804f05c; version=8537257874e949a59c834cecfd5a063e11b64b0b <2185ea6e4ebcb61d1224dc7d187c59723cb5ad59; version=8537257874e949a59c834cecfd5a063e11b64b0b <5eaad4f768266f1f17e01232ffe2ef009f8129b7; version=8537257874e949a59c834cecfd5a063e11b64b0b <b878444519fa03a3edd287d1963cf79ef78be2f1; version=8537257874e949a59c834cecfd5a063e11b64b0b <b8f9ca88253574638bcff38900a4c28d570b1919; version=8537257874e949a59c834cecfd5a063e11b64b0b <f6e90c113c92e83fc0963d5e60e16b0e8a268981

Published CVSS scores

4.7SUSECVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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