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NVD / CVE Program· CNA Linux

CVE-2026-23058: can: ems_usb: ems_usb_read_bulk_callback(): fix URB memory leak

Noroxi assessment

Priority: Monitor (action score 0/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.20% (FIRST EPSS).
  • Fixed version: Linux Linux 0ce73a0eb5a27070957b67fd74059b6da89cc516, 46a191ff7eeec33a2ccb2a1bfea34e18fbc5dc1a, 61e6d3674c3d1da1475dc207b3e75c55d678d18e.

Low priority for now. Upgrade to Linux Linux 0ce73a0eb5a27070957b67fd74059b6da89cc516, 46a191ff7eeec33a2ccb2a1bfea34e18fbc5dc1a, 61e6d3674c3d1da1475dc207b3e75c55d678d18e or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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.

—No exploit Fix available
Published
Feb 4, 2026
Updated
Jun 17, 2026
EPSS
0.2% · 10th percentile
CWE
—

Report tools

JSON

Action score

0

Monitor

Low priority for now.

CVSS
0 / 40 · —
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

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Noroxi analysis

What does it mean in your environment?

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

—

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

    • 2.6.32affected
    • 702171adeed3607ee9603ec30ce081411e36ae42 and later · before e2c71030dc464d437110bcfb367c493fd402bddbaffected · git
    • 702171adeed3607ee9603ec30ce081411e36ae42 and later · before f48eabd15194b216030b32445f44230df95f5fe0affected · git
    • 702171adeed3607ee9603ec30ce081411e36ae42 and later · before 61e6d3674c3d1da1475dc207b3e75c55d678d18eaffected · git
    • 702171adeed3607ee9603ec30ce081411e36ae42 and later · before e9410fdd4d5f7eaa6526d8c80e83029d7c86a8e8affected · git
    • 702171adeed3607ee9603ec30ce081411e36ae42 and later · before 46a191ff7eeec33a2ccb2a1bfea34e18fbc5dc1aaffected · git
    • 702171adeed3607ee9603ec30ce081411e36ae42 and later · before 68c62b3e53901846b5f68c5a8bade72a5d9c0b87affected · git
    • 702171adeed3607ee9603ec30ce081411e36ae42 and later · before 0ce73a0eb5a27070957b67fd74059b6da89cc516affected · git
    • before 2.6.32not 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

Other highest-scoring records for the same primary product.

  • CVE-2026-74705udp: fix potential use-after-free in tunnel segmentation
    40Plan
  • CVE-2026-74612veth: fix skb length accounting after XDP frag adjustment
    40Plan
  • CVE-2026-74475vxlan: use neigh_ha_snapshot() in route_shortcircuit()
    40Plan

Published before and after this one in the same product

  • ← EarlierCVE-2026-23056Feb 4, 2026 · uacce: implement mremap in uacce_vm_ops to return -EPERM
    0Monitor
  • ← EarlierCVE-2026-23057Feb 4, 2026 · vsock/virtio: Coalesce only linear skb
    0Monitor
  • Later →CVE-2026-23059Feb 4, 2026 · scsi: qla2xxx: Sanitize payload size to prevent member overflow
    0Monitor

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 Linux0ce73a0eb5a27070957b67fd74059b6da89cc516Vendor (CNA)
Linux Linux46a191ff7eeec33a2ccb2a1bfea34e18fbc5dc1aVendor (CNA)
Linux Linux61e6d3674c3d1da1475dc207b3e75c55d678d18eVendor (CNA)
Linux Linux68c62b3e53901846b5f68c5a8bade72a5d9c0b87Vendor (CNA)
Linux Linuxe2c71030dc464d437110bcfb367c493fd402bddbVendor (CNA)
Linux Linuxe9410fdd4d5f7eaa6526d8c80e83029d7c86a8e8Vendor (CNA)
Linux Linuxf48eabd15194b216030b32445f44230df95f5fe0Vendor (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.

No history yet (it accumulates with the daily EPSS job).

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

No CVSS vector for this record, so attack conditions can't be derived.

Weakness class (CWE)

—

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✗ → ✓

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References

Show all references (6 more)

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

All records