PT-2021-3382 · Linux+10 · Linux Kernel+10
Norbert Slusarek
+1
·
Published
2021-06-19
·
Updated
2025-09-29
·
CVE-2021-3609
CVSS v3.1
7.0
High
| Vector | AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H |
Name of the Vulnerable Software and Affected Versions
Linux kernel versions 2.6.25 through 5.13-rc6
Description
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 issue is caused by a race condition in the implementation of the CAN BCM protocol. The problem allows for local privilege escalation to root.
Recommendations
For Linux kernel versions 2.6.25 through 5.13-rc6, update to a version that contains a fix for this issue. As a temporary workaround, consider restricting access to the
net/can/bcm.c module to minimize the risk of exploitation. Avoid using the CAN BCM protocol until the issue is resolved. At the moment, there is no information about a newer version that contains a fix for this vulnerability.Exploit
DoS
LPE
Race Condition
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Weakness Enumeration
Related Identifiers
Affected Products
Alt Linux
Almalinux
Astra Linux
Centos
Linuxmint
Linux Kernel
Red Hat
Red Os
Rocky Linux
Suse
Ubuntu