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NVD / CVE Program· CNA Linux

CVE-2026-74459: can: etas_es58x: es58x_read_bulk_callback(): fix RX buffer leak on URB resubmit failure

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: 0.21% (FIRST EPSS).
  • Fixed version: Linux Linux 0ef136ba052101243ba117a1aca6f4a4c3a81142, 19c6c8c6cd5dd14fab5fcd744584812a57cbb78d, 21da1a374769751546cc131e58a4d8bd968f57b2.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 0ef136ba052101243ba117a1aca6f4a4c3a81142, 19c6c8c6cd5dd14fab5fcd744584812a57cbb78d, 21da1a374769751546cc131e58a4d8bd968f57b2 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: etas_es58x: es58x_read_bulk_callback(): fix RX buffer leak on URB resubmit failure es58x_read_bulk_callback() resubmits the RX URB after processing a received packet. If the resubmit succeeds, the URB remains anchored and will be handled by the normal RX path or by teardown. However, if usb_submit_urb() fails, the callback unanchors the URB and then returns directly. This skips the existing free_urb path, so the coherent transfer buffer allocated with usb_alloc_coherent() is not released. Reuse the existing free_urb path after a resubmit failure so that the RX coherent buffer is freed before leaving the callback.

—No exploit Fix available
Published
Aug 15, 2026
Updated
Aug 19, 2026
EPSS
0.2% · 11th 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%

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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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

    • b8f9ca88253574638bcff38900a4c28d570b1919, 7.0affected
    • 7a0171b4921ad443fee5ed4fcb9d99fa4776edac and later · before c7ddf119544eea2d8409e12471c3f9f36ca02e3faffected · git
    • 2185ea6e4ebcb61d1224dc7d187c59723cb5ad59 and later · before 21da1a374769751546cc131e58a4d8bd968f57b2affected · git
    • f6e90c113c92e83fc0963d5e60e16b0e8a268981 and later · before 0ef136ba052101243ba117a1aca6f4a4c3a81142affected · git
    • b878444519fa03a3edd287d1963cf79ef78be2f1 and later · before b85e5c310382803d27adf6fe6554d4208bc8951caffected · git
    • 18eee279e9b5bff0db1aca9475ae4bc12804f05c and later · before c311f17c261fd375ddf5755f2ebe1f022c19c5b0affected · git
    • 5eaad4f768266f1f17e01232ffe2ef009f8129b7 and later · before 19c6c8c6cd5dd14fab5fcd744584812a57cbb78daffected · git
    • 5eaad4f768266f1f17e01232ffe2ef009f8129b7 and later · before 7a0cf2b2497c757c3cb1286eddf2986abb0d387baffected · git
    • 5.15.203 and later · before 5.15.216affected · semver
    • 6.1.167 and later · before 6.1.183affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.187-16.1.187-1
Debian:12linux-6.12before 6.12.107-1~deb12u16.12.107-1~deb12u1
Debian:13linuxbefore 6.12.105-16.12.105-1
Debian:14linuxbefore 7.1.8-17.1.8-1

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-2026-74457Aug 15, 2026 · can: peak_usb: add bounds check for USB channel index
    0Monitor
  • ← EarlierCVE-2026-74458Aug 15, 2026 · can: kvaser_usb_leaf: kvaser_usb_leaf_wait_cmd(): validate received command extents
    0Monitor
  • Later →CVE-2026-74462Aug 15, 2026 · i2c: imx: mark I2C adapter when hardware is powered down
    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 Linux0ef136ba052101243ba117a1aca6f4a4c3a81142Vendor (CNA)
Linux Linux19c6c8c6cd5dd14fab5fcd744584812a57cbb78dVendor (CNA)
Linux Linux21da1a374769751546cc131e58a4d8bd968f57b2Vendor (CNA)
Linux Linux5.15.216Vendor (CNA)
Linux Linux6.1.183Vendor (CNA)
Linux Linux6.12.103Vendor (CNA)
Linux Linux6.18.44Vendor (CNA)
Linux Linux6.20Vendor (CNA)
Linux Linux6.6.151Vendor (CNA)
Linux Linux7a0cf2b2497c757c3cb1286eddf2986abb0d387bVendor (CNA)
Linux Linuxb85e5c310382803d27adf6fe6554d4208bc8951cVendor (CNA)
Linux Linuxc311f17c261fd375ddf5755f2ebe1f022c19c5b0Vendor (CNA)
Linux Linuxc7ddf119544eea2d8409e12471c3f9f36ca02e3fVendor (CNA)
debian:linux6.1.187-1 · Debian:12Package registry (OSV)
debian:linux-6.126.12.107-1~deb12u1 · 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).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

All national notices →

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✗ → ✓

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

References

Show all references (6 more)

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

All records