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NVD / CVE Program· CNA Linux

CVE-2026-72114: can: bcm: validate frame length in bcm_rx_setup() for RTR replies

Noroxi assessment

Priority: Monitor (action score 31/100)

  • 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: 0.16% (FIRST EPSS).
  • 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.
  • Fixed version: Linux Linux 1b475c0c72f44622a320a4386ce9e76f85e69bc7, 204f2b232717bc470ddb9e1da1d27dd9c6ef0caa, 59bfddea64159594feb62ef11b7d7a33c8ee3783.

Low priority for now. Upgrade to Linux Linux 1b475c0c72f44622a320a4386ce9e76f85e69bc7, 204f2b232717bc470ddb9e1da1d27dd9c6ef0caa, 59bfddea64159594feb62ef11b7d7a33c8ee3783 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: bcm: validate frame length in bcm_rx_setup() for RTR replies bcm_tx_setup() validates cf->len against the CAN/CAN FD DLC limits before installing frames for TX_SETUP, but bcm_rx_setup() never did the same for the RTR-reply frame configured via RX_SETUP with RX_RTR_FRAME.

HighCVSS 7.8 · v3.1—No exploit Fix available
Published
Aug 15, 2026
Updated
Oct 16, 2026
EPSS
0.1% · 6th percentile
CWE
—

Report tools

JSON

Action score

31

Monitor

Low priority for now.

CVSS
31 / 40 · 7.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · Linux
7.8
NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

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

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2026-72114

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • 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

    • 2.6.25affected
    • ffd980f976e7fd666c2e61bf8ab35107efd11828 and later · before cc1f9569f1c1adf74fa69d6f716a31b58a2fc6ceaffected · git
    • ffd980f976e7fd666c2e61bf8ab35107efd11828 and later · before 204f2b232717bc470ddb9e1da1d27dd9c6ef0caaaffected · git
    • ffd980f976e7fd666c2e61bf8ab35107efd11828 and later · before e061624c0a86c3c26a2bf017e432fbc93ad68f3aaffected · git
    • ffd980f976e7fd666c2e61bf8ab35107efd11828 and later · before 7d966cdee006911d3957e1a4e72cb93c39cd8c1eaffected · git
    • ffd980f976e7fd666c2e61bf8ab35107efd11828 and later · before 1b475c0c72f44622a320a4386ce9e76f85e69bc7affected · git
    • ffd980f976e7fd666c2e61bf8ab35107efd11828 and later · before deb6a697cce3f021e731df543597f37a5e54caabaffected · git
    • ffd980f976e7fd666c2e61bf8ab35107efd11828 and later · before 59bfddea64159594feb62ef11b7d7a33c8ee3783affected · git
    • ffd980f976e7fd666c2e61bf8ab35107efd11828 and later · before 62ec41f364648be79d54d94d0d240ee326948afdaffected · git
    • before 2.6.25not 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 6.12.101-1~deb12u16.12.101-1~deb12u1
Debian:13linuxbefore 6.12.101-16.12.101-1
Debian:14linuxbefore 7.1.5-17.1.5-1

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-2026-72111Aug 15, 2026 · bpf: Reset register bounds before narrowing retval range in check_mem_access()
    35Monitor
  • ← EarlierCVE-2026-72113Aug 15, 2026 · can: bcm: add missing device refcount for CAN filter removal
    31Monitor
  • Later →CVE-2026-72115Aug 15, 2026 · can: bcm: track a single source interface for ANYDEV timeout/throttle ops
    32Monitor

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 Linux1b475c0c72f44622a320a4386ce9e76f85e69bc7Vendor (CNA)
Linux Linux204f2b232717bc470ddb9e1da1d27dd9c6ef0caaVendor (CNA)
Linux Linux59bfddea64159594feb62ef11b7d7a33c8ee3783Vendor (CNA)
Linux Linux62ec41f364648be79d54d94d0d240ee326948afdVendor (CNA)
Linux Linux7d966cdee006911d3957e1a4e72cb93c39cd8c1eVendor (CNA)
Linux Linuxcc1f9569f1c1adf74fa69d6f716a31b58a2fc6ceVendor (CNA)
Linux Linuxdeb6a697cce3f021e731df543597f37a5e54caabVendor (CNA)
Linux Linuxe061624c0a86c3c26a2bf017e432fbc93ad68f3aVendor (CNA)
debian:linux6.1.187-1 · Debian:12Package registry (OSV)
debian:linux-6.126.12.101-1~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).

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

Weakness class (CWE)

—

CVSS vector

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

nvd-secondary

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. SSVC exploitation— → none
  2. Fix✗ → ✓

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

References

Show all references (7 more)

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

All records