CVE-2021-47548
Linux Kernel vulnerability
- Published24 May 2024
Description
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.
CVSS 3.1 breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HAffected products
Remediation
Frequently asked
Is CVE-2021-47548 being actively exploited?
CVE-2021-47548 is not in the CISA KEV catalog. Its EPSS exploit probability is 1.36%.
How severe is CVE-2021-47548?
CVE-2021-47548 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 1.36% probability of exploitation.
Which products are affected by CVE-2021-47548?
Affected products include Linux Kernel.
How do I fix CVE-2021-47548?
Upgrade affected software to a fixed version, for example Linux Kernel 4.14.257 or later, then confirm no affected versions remain in your inventory.
How Secuno handles this
Secuno correlates vulnerabilities like CVE-2021-47548 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.
Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.