What is CVE-2021-47548?

CVE-2021-47548 is a Critical severity Linux kernel vulnerability with a CVSS score of 9.8 out of 10. CVE-2021-47548 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2021-47548?

CVE-2021-47548 has a CVSS score of 9.8 out of 10, rated Critical severity. The vector string is CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Is there a patch available for CVE-2021-47548?

No patch is currently available for CVE-2021-47548. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

Is CVE-2021-47548 actively exploited?

CVE-2021-47548 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2021-47548

Critical

In the Linux kernel, the following vulnerability has been resolved: ethernet: hisilicon: hns: hns_dsaf_misc: fix a possible array overflow in hns_dsaf_ge_srst_by_port() The if statement: if (port >= DSAF_GE_NUM) return; limits the value of port less than DSAF_GE_NUM (i.e., 8). However, if the value of port is 6 or 7, an array overflow could occur: port_rst_off = dsaf_dev->mac_cb[port]->port_rst_off; because the length of dsaf_dev->mac_cb is DSAF_MAX_PORT_NUM (i.e., 6). To fix this possible array overflow, we first check port and if it is greater than or equal to DSAF_MAX_PORT_NUM, the function returns.

Package Linux Kernel

Published 2024-05-24

Last modified 2025-04-01

CVSS version 3.1

Patch available

Awaiting data

CVSS 3.1 score

9.8

out of 10

Critical

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Vector string

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness type

CWE-129

CVE-2021-47548 is classified as CWE-129

See CWE-129 on MITRE CWE for full details on this weakness type.

References

The following references provide additional information about CVE-2021-47548 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Kernel patch commit
https://git.kernel.org/stable/c/22519eff7df2d88adcc2568d86046ce1e2b52803
Patch
Kernel patch commit
https://git.kernel.org/stable/c/948968f8747650447c8f21c9fdba0e1973be040b
Patch
Kernel patch commit
https://git.kernel.org/stable/c/99bb25cb6753beaf2c2bc37927c2ecc0ceff3f6d
Patch

7 patch commits total View all on NVD

Details

CVE ID CVE-2021-47548

Severity Critical

CVSS score 9.8 / 10

CVSS version 3.1

Published 2024-05-24

Modified 2025-04-01

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2021-47548?

CVE-2021-47548 is a Critical severity Linux kernel vulnerability with a CVSS score of 9.8 out of 10 . CVE-2021-47548 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2021-47548?

CVE-2021-47548 has a CVSS score of 9.8 out of 10, rated Critical severity (CVSS 3.1). The vector string is CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Is there a patch available for CVE-2021-47548?

No patch is currently available for CVE-2021-47548. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
Is CVE-2021-47548 actively exploited?

No — CVE-2021-47548 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.