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NVD / CVE Program· CNA Linux

CVE-2026-74455: can: peak_usb: validate uCAN receive record lengths

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: 0.17% (FIRST EPSS).
  • Fixed version: Linux Linux 2427ef427bdd78d862c7c76597bfd9eda88b81f1, 276d989cd2dd88e2b7ab2c96fd10c86836b12781, 2c8f08f3641a074da40acf05baa5a18ae2739260; azl3 kernel 6.6.150.1-1 on Azure Linux 3.0 6.6.152.1-1.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 2427ef427bdd78d862c7c76597bfd9eda88b81f1, 276d989cd2dd88e2b7ab2c96fd10c86836b12781, 2c8f08f3641a074da40acf05baa5a18ae2739260; azl3 kernel 6.6.150.1-1 on Azure Linux 3.0 6.6.152.1-1 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: peak_usb: validate uCAN receive record lengths pcan_usb_fd_decode_buf() walks uCAN records packed in one USB receive buffer. Require each record to contain the fixed header for its type, and verify CAN payload bytes before copying them into the skb.

—No exploit Fix available
Published
Aug 15, 2026
Updated
Aug 19, 2026
EPSS
0.1% · 7th 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 · 0.1%

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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When you'll hear from us

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  • when exploit code appears or is weaponized
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  • when EPSS rises 20 points in a week

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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

    • 4.0affected
    • 0a25e1f4f18566b750ebd3ae995af64e23111e63 and later · before 276d989cd2dd88e2b7ab2c96fd10c86836b12781affected · git
    • 0a25e1f4f18566b750ebd3ae995af64e23111e63 and later · before bf9d787b7e1ef59be19b35abca08194772deb97eaffected · git
    • 0a25e1f4f18566b750ebd3ae995af64e23111e63 and later · before 89c92a8052698dbbd3652a77c04d02bbd74a3275affected · git
    • 0a25e1f4f18566b750ebd3ae995af64e23111e63 and later · before 6067c878e38d02a3d5c43497347e143f85c9064aaffected · git
    • 0a25e1f4f18566b750ebd3ae995af64e23111e63 and later · before 2c8f08f3641a074da40acf05baa5a18ae2739260affected · git
    • 0a25e1f4f18566b750ebd3ae995af64e23111e63 and later · before 2427ef427bdd78d862c7c76597bfd9eda88b81f1affected · git
    • 0a25e1f4f18566b750ebd3ae995af64e23111e63 and later · before d9c115948c3dd5fcc2d0245cec5eb76c098503c8affected · git
    • 0a25e1f4f18566b750ebd3ae995af64e23111e63 and later · before 93fcab2c6968446316bbb49548848df604d6346faffected · git
    • before 4.0not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.187-16.1.187-1
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-2026-74452Aug 15, 2026 · drm/panthor: reject firmware sections with oversized data
    31Monitor
  • ← EarlierCVE-2026-74454Aug 15, 2026 · drm/vc4: Supply the overflow slot size in BPOS, not the whole bin BO size
    31Monitor
  • Later →CVE-2026-74457Aug 15, 2026 · can: peak_usb: add bounds check for USB channel index
    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 Linux2427ef427bdd78d862c7c76597bfd9eda88b81f1Vendor (CNA)
Linux Linux276d989cd2dd88e2b7ab2c96fd10c86836b12781Vendor (CNA)
Linux Linux2c8f08f3641a074da40acf05baa5a18ae2739260Vendor (CNA)
Linux Linux6067c878e38d02a3d5c43497347e143f85c9064aVendor (CNA)
Linux Linux89c92a8052698dbbd3652a77c04d02bbd74a3275Vendor (CNA)
Linux Linux93fcab2c6968446316bbb49548848df604d6346fVendor (CNA)
Linux Linuxbf9d787b7e1ef59be19b35abca08194772deb97eVendor (CNA)
Linux Linuxd9c115948c3dd5fcc2d0245cec5eb76c098503c8Vendor (CNA)
azl3 kernel 6.6.150.1-1 on Azure Linux 3.06.6.152.1-1 · Release NotesMicrosoft (MSRC)
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✗ → ✓

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References

Show all references (7 more)

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

All records