Home/CVE/.A flaw was found in the CAN BCM networking protocol in the Linux kernel, where a local attacker can abuse a flaw in the
CVE

CVE-2021-3609

.A flaw was found in the CAN BCM networking protocol in the Linux kernel, where a local attacker can abuse a flaw in the

.A flaw was found in the CAN BCM networking protocol in the Linux kernel, where a local attacker can abuse a flaw in the CAN subsystem to corrupt memory, crash the system or escalate privileges. This race condition in net/can/bcm.c in the Linux kernel allows for local privilege escalation to root.

HIGH · CVSS 7 EPSS 0.0006
Act now
  • Public exploit or PoC is available
  • CVSS base score ≥ 7.0
Sigma rules1 YARA rules0
⬡

Weakness Classification

CWE-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
CWE-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
▤

Affected Products & Versions

39
linux kernel>= 2.6.25 and < 4.4.276
linux kernel>= 4.5 and < 4.9.276
linux kernel>= 4.10 and < 4.14.240
linux kernel>= 4.15 and < 4.19.198
linux kernel>= 4.20 and < 5.4.132
linux kernel>= 5.5.0 and < 5.10.50
linux kernel>= 5.11 and < 5.12.17
linux kernel>= 5.13 and < 5.13.2
⚠

Public Exploits & PoCs

1
pocgithub.com · cve-2021-3609.mdgithub.com
◈

Sigma Hunt Rules

1
Exact rules name this CVE ID. Product rules name an affected product in their title. Related rules cover techniques used by actors who exploited this CVE. Showing the most relevant matches; the complete related set is on the full drill-down.
productmediumPowershell Detect Virtualization Environment
▣

Scoring & Timeline

7
HIGH · CVSS v3.1 · secalert@redhat.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD03 Mar 2022 · 07:15 PM
CVSS VectorCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
⚑

Vendor Advisories

30
usnUSN-5513-1
usnUSN-5505-1
msrcCVE-2021-3609
suse-csafSUSE-SU-2021:14849-1
usnUSN-5082-1
🔗

References & Sources

4
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://bugzilla.redhat.com/show_bug.cgi?id=1971651Issue TrackingThird Party Advisory
https://github.com/torvalds/linux/commit/d5f9023fa61ee8b94f37a93f08e94b136cf1e463PatchThird Party Advisory
https://security.netapp.com/advisory/ntap-20220419-0004/Third Party Advisory
https://www.openwall.com/lists/oss-security/2021/06/19/1Mailing ListThird Party Advisory
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