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redhatcveRedhat.comRH:CVE-2021-47558
HistoryMay 27, 2024 - 9:57 a.m.

CVE-2021-47558

2024-05-2709:57:36
redhat.com
access.redhat.com
2
cve-2021-47558
kernel panic
interface configuration
tx queues
netif_tx_disable implementation

6.3 Medium

AI Score

Confidence

Low

0.0004 Low

EPSS

Percentile

9.0%

In the Linux kernel, the following vulnerability has been resolved: net: stmmac: Disable Tx queues when reconfiguring the interface The Tx queues were not disabled in situations where the driver needed to stop the interface to apply a new configuration. This could result in a kernel panic when doing any of the 3 following actions: * reconfiguring the number of queues (ethtool -L) * reconfiguring the size of the ring buffers (ethtool -G) * installing/removing an XDP program (ip l set dev ethX xdp) Prevent the panic by making sure netif_tx_disable is called when stopping an interface. Without this patch, the following kernel panic can be observed when doing any of the actions above: Unable to handle kernel paging request at virtual address ffff80001238d040 […] Call trace: dwmac4_set_addr+0x8/0x10 dev_hard_start_xmit+0xe4/0x1ac sch_direct_xmit+0xe8/0x39c __dev_queue_xmit+0x3ec/0xaf0 dev_queue_xmit+0x14/0x20 […] [ end trace 0000000000000002 ]—

6.3 Medium

AI Score

Confidence

Low

0.0004 Low

EPSS

Percentile

9.0%