What is CVE-2021-47049?

CVE-2021-47049 is a high-severity vulnerability in Linux, classified under Use After Free. CVSS score: 8.4/10. Published 2024-02-28.

How severe is CVE-2021-47049?

High severity. CVSS v3 base score is 8.4 out of 10.

Use After Free in Linux

CVE-2021-47049

In the Linux kernel, the following vulnerability has been resolved: Drivers: hv: vmbus: Use after free in __vmbus_open() The "open_info" variable is added to the &vmbus_connection.chn_msg_list, but the error handling frees "open_info" without removing it from the list. This will result in a use after free. First remove it from the list, and then free it.

Vulnerability class: Use-After-Free

EPSS: 0.002 (13.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.4 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Linux — versions 5.11.21, 6f3d791f300618caf82a2be0c27456edd76d5164, 5.12.4
Linux Linux_kernel

Weakness classification (CWE)

CWE-416 — Use After Free

References

416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)
416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)
416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)
416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)

Frequently asked questions

What is CVE-2021-47049?: CVE-2021-47049 is a high-severity vulnerability in Linux, classified under Use After Free. CVSS score: 8.4/10. Published 2024-02-28.
How severe is CVE-2021-47049?: High severity. CVSS v3 base score is 8.4 out of 10.