CVE-2021-47548 ethernet: hisilicon: hns: hns_dsaf_misc: fix a possible array overflow in hns_dsaf_ge_srst_by_port()
A missing bounds check in the Hisilicon HNS Ethernet driver allows an array overflow, potentially leading to denial of service or code execution.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2021-47548?
CVE-2021-47548 is a critical vulnerability in Linux kernel, published on 24 May 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-129
Which versions are affected by CVE-2021-47548?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2021-47548?
Apply the vendor's patch.
Is CVE-2021-47548 being exploited?
There is no known exploitation of CVE-2021-47548 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as DEBIAN-CVE-2021-47548, UBUNTU-CVE-2021-47548.