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 CAN subsystem to corrupt memory, crash the system or escalate privileges.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.43%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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 race condition in net/can/bcm.c in the Linux kernel allows for local privilege escalation to root.
- CVSS 3.1
- 7.0 HIGHCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.43% probability · 37th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-362
- Affected
- linux/linux kernel · redhat/3scale api management · redhat/build of quarkus · redhat/codeready linux builder eus · redhat/codeready linux builder for power little endian eus · redhat/openshift container platform · redhat/virtualization · redhat/virtualization host · redhat/enterprise linux aus · redhat/enterprise linux eus · redhat/enterprise linux for ibm z systems eus · redhat/enterprise linux for ibm z systems eus s390x · redhat/enterprise linux for power little endian eus · redhat/enterprise linux for real time · redhat/enterprise linux for real time for nfv · redhat/enterprise linux for real time for nfv tus · redhat/enterprise linux for real time tus · redhat/enterprise linux server aus · redhat/enterprise linux server for power little endian update services for sap solutions · redhat/enterprise linux server tus · +12 more
- Source
- secalert@redhat.com
References
- https://bugzilla.redhat.com/show_bug.cgi?id=1971651Issue Tracking, Third Party Advisory
- https://github.com/nrb547/kernel-exploitation/blob/main/cve-2021-3609/cve-2021-3609.mdExploit, Technical Description, Third Party Advisory
- https://github.com/torvalds/linux/commit/d5f9023fa61ee8b94f37a93f08e94b136cf1e463Patch, Third Party Advisory
- https://security.netapp.com/advisory/ntap-20220419-0004/Third Party Advisory
- https://www.openwall.com/lists/oss-security/2021/06/19/1Mailing List, Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1971651Issue Tracking, Third Party Advisory
- https://github.com/nrb547/kernel-exploitation/blob/main/cve-2021-3609/cve-2021-3609.mdExploit, Technical Description, Third Party Advisory
- https://github.com/torvalds/linux/commit/d5f9023fa61ee8b94f37a93f08e94b136cf1e463Patch, Third Party Advisory
- https://security.netapp.com/advisory/ntap-20220419-0004/Third Party Advisory
- https://www.openwall.com/lists/oss-security/2021/06/19/1Mailing List, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.