# CVE-2026-72411: linux: In the Linux kernel, the following vulnerability has been resolved:  net: dsa: mxl862xx: fix use-after-free of DSA po...

CVE-2026-72411 is fixed in linux on 1 platform by DEBIAN-CVE-2026-72411 (version 7.1.5-1), released August 15, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-72411
- Priority: High
- CVSS: 7.8 (high)
- EPSS: 0.0017
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Aug 15, 2026

## Description

In the Linux kernel, the following vulnerability has been resolved:  net: dsa: mxl862xx: fix use-after-free of DSA ports in crc_err_work  Upon an MDIO CRC error mxl862xx_crc_err_work_fn() walks the DSA ports and closes the CPU port conduits:  	dsa_switch_for_each_cpu_port(dp, priv->ds) 		dev_close(dp->conduit);  mxl862xx_remove() unregisters the switch before cancelling this work:  	set_bit(MXL862XX_FLAG_WORK_STOPPED, &priv->flags); 	cancel_delayed_work_sync(&priv->stats_work); 	dsa_unregister_switch(ds); 	mxl862xx_host_shutdown(priv);  dsa_unregister_switch() frees the dsa_port objects. If a CRC error schedules the work during teardown it can run after the ports have been freed and dereference freed memory.  Guard the port walk with MXL862XX_FLAG_WORK_STOPPED, which is already set before dsa_unregister_switch(). DSA tears the ports down under rtnl_lock(), so checking the flag under rtnl_lock() means the work either runs before teardown and sees valid ports, or runs afterwards, observes the flag and skips the walk. This mirrors the host_flood_work handler, which skips torn-down ports under rtnl_lock().

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 14 | 7.1.5-1 | [DEBIAN-CVE-2026-72411](https://patchblox.com/security/data/fix/linux/debian-cve-2026-72411.md) | Aug 15, 2026 |

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Data as of 2026-11-09T19:38:12Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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