Vulnerability Description
A flaw use-after-free in function sco_sock_sendmsg() of the Linux kernel HCI subsystem was found in the way user calls ioct UFFDIO_REGISTER or other way triggers race condition of the call sco_conn_del() together with the call sco_sock_sendmsg() with the expected controllable faulting memory page. A privileged local user could use this flaw to crash the system or escalate their privileges on the system.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | < 4.4.293 |
| Debian | Debian Linux | 9.0 |
| Fedoraproject | Fedora | 34 |
| Canonical | Ubuntu Linux | 14.04 |
| Netapp | H300S Firmware | - |
| Netapp | H300S | - |
| Netapp | H700S Firmware | - |
| Netapp | H700S | - |
| Netapp | H300E Firmware | - |
| Netapp | H300E | - |
| Netapp | H500E Firmware | - |
| Netapp | H500E | - |
| Netapp | H700E Firmware | - |
| Netapp | H700E | - |
| Netapp | H410S Firmware | - |
| Netapp | H410S | - |
| Netapp | H410C Firmware | - |
| Netapp | H410C | - |
| Netapp | H500S Firmware | - |
| Netapp | H500S | - |
Related Weaknesses (CWE)
References
- https://bugzilla.redhat.com/show_bug.cgi?id=1980646Issue TrackingPatchThird Party Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/net/blPatchVendor Advisory
- https://github.com/torvalds/linux/commit/99c23da0eed4fd20cae8243f2b51e10e66aa095PatchThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2022/03/msg00011.htmlMailing ListThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2022/03/msg00012.htmlMailing ListThird Party Advisory
- https://security.netapp.com/advisory/ntap-20220419-0003/Third Party Advisory
- https://ubuntu.com/security/CVE-2021-3640PatchThird Party Advisory
- https://www.debian.org/security/2022/dsa-5096Third Party Advisory
- https://www.openwall.com/lists/oss-security/2021/07/22/1ExploitMailing ListThird Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1980646Issue TrackingPatchThird Party Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/net/blPatchVendor Advisory
- https://github.com/torvalds/linux/commit/99c23da0eed4fd20cae8243f2b51e10e66aa095PatchThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2022/03/msg00011.htmlMailing ListThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2022/03/msg00012.htmlMailing ListThird Party Advisory
- https://security.netapp.com/advisory/ntap-20220419-0003/Third Party Advisory
FAQ
What is CVE-2021-3640?
CVE-2021-3640 is a vulnerability with a CVSS score of 7.0 (HIGH). A flaw use-after-free in function sco_sock_sendmsg() of the Linux kernel HCI subsystem was found in the way user calls ioct UFFDIO_REGISTER or other way triggers race condition of the call sco_conn_de...
How severe is CVE-2021-3640?
CVE-2021-3640 has been rated HIGH with a CVSS base score of 7.0/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-3640?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel, Debian Debian Linux, Fedoraproject Fedora, Canonical Ubuntu Linux, Netapp H300S Firmware.