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CVE-2026-23075· NVD / CVE Program· CNA Linux

can: esd_usb: esd_usb_read_bulk_callback(): fix URB memory leak

In the Linux kernel, the following vulnerability has been resolved: can: esd_usb: esd_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 esd_usb_open(), the URBs for USB-in transfers are allocated, added to the dev->rx_submitted anchor and submitted. In the complete callback esd_usb_read_bulk_callback(), the URBs are processed and resubmitted. In esd_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 esd_usb_close(). Fix the memory leak by anchoring the URB in the esd_usb_read_bulk_callback() to the dev->rx_submitted anchor.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
Feb 4, 2026
Updated
Jun 17, 2026
EPSS
0.1% · 2th percentile
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Action score

22

Monitor

Low priority for now.

CVSS
22 / 40 · 5.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

Noroxi analysis

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Affected systems

VendorProduct
linuxlinux kernel

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • linux linux kernel2.6.36 and later · before 5.10.249
  • linux linux kernel5.11 and later · before 5.15.199
  • linux linux kernel5.16 and later · before 6.1.162
  • linux linux kernel6.2 and later · before 6.6.122
  • linux linux kernel6.7 and later · before 6.12.68
  • linux linux kernel6.13 and later · before 6.18.8
  • linux linux kernel6.19

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • 2.6.36affected
    • 96d8e90382dc336b5de401164597edfdc2e8d9f1 and later · before 93b34d4ba7266030801a509c088ac77c0d7a12e9affected · git
    • 96d8e90382dc336b5de401164597edfdc2e8d9f1 and later · before dc934d96673992af8568664c1b58e13eb164010daffected · git
    • 96d8e90382dc336b5de401164597edfdc2e8d9f1 and later · before 92d26ce07ac3b7a850dc68c8d73d487b39c39b33affected · git
    • 96d8e90382dc336b5de401164597edfdc2e8d9f1 and later · before adec5e1f9c99fe079ec4c92cca3f1109a3e257c3affected · git
    • 96d8e90382dc336b5de401164597edfdc2e8d9f1 and later · before 9d1807b442fc3286b204f8e59981b10e743533ceaffected · git
    • 96d8e90382dc336b5de401164597edfdc2e8d9f1 and later · before a9503ae43256e80db5cba9d449b238607164c51daffected · git
    • 96d8e90382dc336b5de401164597edfdc2e8d9f1 and later · before 5a4391bdc6c8357242f62f22069c865b792406b3affected · git
    • before 2.6.36not affected · semver
    • 5.10.249 and later · up to and including 5.10.*not affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.162-16.1.162-1
Debian:13linuxbefore 6.12.69-16.12.69-1
Debian:14linuxbefore 6.18.8-16.18.8-1

Same product

linux: all records

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Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux5a4391bdc6c8357242f62f22069c865b792406b3Vendor (CNA)
Linux Linux92d26ce07ac3b7a850dc68c8d73d487b39c39b33Vendor (CNA)
Linux Linux93b34d4ba7266030801a509c088ac77c0d7a12e9Vendor (CNA)
Linux Linux9d1807b442fc3286b204f8e59981b10e743533ceVendor (CNA)
Linux Linuxa9503ae43256e80db5cba9d449b238607164c51dVendor (CNA)
Linux Linuxadec5e1f9c99fe079ec4c92cca3f1109a3e257c3Vendor (CNA)
Linux Linuxdc934d96673992af8568664c1b58e13eb164010dVendor (CNA)
debian:linux6.1.162-1 · Debian:12Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

CWE-401 · Missing Release of Memory after Effective Lifetime

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records