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NVD / CVE Program· CNA Linux

CVE-2026-72120: can: bcm: add missing rcu list annotations and operations

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 30f7bb922cb7e7f072a56c7cb7a5efccd2ceca1d, 4e22e8b505f877573bbdfdbcb680babad9b2f7a1, 5.10.261.

Low priority for now. Upgrade to Linux Linux 30f7bb922cb7e7f072a56c7cb7a5efccd2ceca1d, 4e22e8b505f877573bbdfdbcb680babad9b2f7a1, 5.10.261 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: add missing rcu list annotations and operations sashiko-bot remarked the missing use of list_add_rcu() in bcm_[rx|tx]_setup() to have a proper initialized bcm_op structure when bcm_proc_show() traverses the bcm_op's under rcu_read_lock(). To cover all initial settings of the bcm_op's the list_add_rcu() calls are moved to the end of the setup code. While at it, also fix the mirroring removal side: bcm_release() called bcm_remove_op() - which frees the op via call_rcu() - on ops that were still linked in bo->tx_ops/bo->rx_ops, without list_del_rcu() first. Unlink each op with list_del_rcu() before handing it to bcm_remove_op(), matching the existing pattern in bcm_delete_tx_op()/bcm_delete_rx_op().

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.

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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

    • 19f553a1ddf260da6570ed8f8d91a8c87f49b63a, 7c9db92d5f0eadca30884af75c53d601edc512ee, 6.15affected
    • 659701c0b954ccdb4a916a4ad59bbc16e726d42c and later · before 8357255e56dc1aaa437e3c53ee9385de984e0d57affected · git
    • 0622846db728a5332b917c797c733e202c4620ae and later · before 8e1c7257c81577130f5ce90f69b2a2c3ce63f957affected · git
    • 6d7d458c41b98a5c1670cbd36f2923c37de51cf5 and later · before eb1c26eab4d1f0b4450439b4b88c3e73faf1da98affected · git
    • 1f912f8484e9c4396378c39460bbea0af681f319 and later · before f53bdab85e64eb57d6899a30d1307fd5a3639cc7affected · git
    • 63567ecd99a24495208dc860d50fb17440043006 and later · before 4e22e8b505f877573bbdfdbcb680babad9b2f7a1affected · git
    • dac5e6249159ac255dad9781793dbe5908ac9ddb and later · before b06a4a397ac826603f39875cb7c7819a41365196affected · git
    • dac5e6249159ac255dad9781793dbe5908ac9ddb and later · before 30f7bb922cb7e7f072a56c7cb7a5efccd2ceca1daffected · git
    • dac5e6249159ac255dad9781793dbe5908ac9ddb and later · before 7b2c3eabc4dafc062a25e10711154f2107526a78affected · git
    • 5.10.238 and later · before 5.10.261affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.180-16.1.180-1
Debian:13linuxbefore 6.12.100-16.12.100-1
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-2026-72118Aug 15, 2026 · can: bcm: fix CAN frame rx/tx statistics
    0Monitor
  • ← EarlierCVE-2026-72119Aug 15, 2026 · can: bcm: extend bcm_tx_lock usage for data and timer updates
    31Monitor
  • Later →CVE-2026-72121Aug 15, 2026 · can: bcm: add locking when updating filter and timer values
    35Monitor

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 Linux30f7bb922cb7e7f072a56c7cb7a5efccd2ceca1dVendor (CNA)
Linux Linux4e22e8b505f877573bbdfdbcb680babad9b2f7a1Vendor (CNA)
Linux Linux5.10.261Vendor (CNA)
Linux Linux5.15.212Vendor (CNA)
Linux Linux5.5Vendor (CNA)
Linux Linux6.1.178Vendor (CNA)
Linux Linux6.12.97Vendor (CNA)
Linux Linux6.15Vendor (CNA)
Linux Linux6.6.145Vendor (CNA)
Linux Linux7b2c3eabc4dafc062a25e10711154f2107526a78Vendor (CNA)
Linux Linux8357255e56dc1aaa437e3c53ee9385de984e0d57Vendor (CNA)
Linux Linux8e1c7257c81577130f5ce90f69b2a2c3ce63f957Vendor (CNA)
Linux Linuxb06a4a397ac826603f39875cb7c7819a41365196Vendor (CNA)
Linux Linuxeb1c26eab4d1f0b4450439b4b88c3e73faf1da98Vendor (CNA)
Linux Linuxf53bdab85e64eb57d6899a30d1307fd5a3639cc7Vendor (CNA)
debian:linux6.1.180-1 · 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
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