# CVE-2021-47558: linux: In the Linux kernel, the following vulnerability has been resolved:  net: stmmac: Disable Tx queues when reconfigurin...

CVE-2021-47558 is fixed in linux on 1 platform, first by DEBIAN-CVE-2021-47558, released May 24, 2024. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2021-47558
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0018
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: May 24, 2024

## Description

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 ]---

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 5.15.15-1 | [DEBIAN-CVE-2021-47558](https://patchblox.com/security/data/fix/linux/debian-cve-2021-47558.md) | May 24, 2024 |
| Linux | linux Debian 13.5 (trixie) | 5.15.15-1 | [DEBIAN-CVE-2021-47558](https://patchblox.com/security/data/fix/linux/debian-cve-2021-47558.md) | May 24, 2024 |
| Linux | linux Debian 14 | 5.15.15-1 | [DEBIAN-CVE-2021-47558](https://patchblox.com/security/data/fix/linux/debian-cve-2021-47558.md) | May 24, 2024 |

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