# CVE-2023-52509: linux: In the Linux kernel, the following vulnerability has been resolved:  ravb: Fix use-after-free issue in ravb_tx_timeou...

CVE-2023-52509 is fixed in linux on 1 platform, first by DEBIAN-CVE-2023-52509, released March 2, 2024. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2023-52509
- Priority: High
- CVSS: 7.8 (high)
- EPSS: 0.0024
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Mar 2, 2024

## Description

In the Linux kernel, the following vulnerability has been resolved:  ravb: Fix use-after-free issue in ravb_tx_timeout_work()  The ravb_stop() should call cancel_work_sync(). Otherwise, ravb_tx_timeout_work() is possible to use the freed priv after ravb_remove() was called like below:  CPU0			CPU1 			ravb_tx_timeout() ravb_remove() unregister_netdev() free_netdev(ndev) // free priv 			ravb_tx_timeout_work() 			// use priv  unregister_netdev() will call .ndo_stop() so that ravb_stop() is called. And, after phy_stop() is called, netif_carrier_off() is also called. So that .ndo_tx_timeout() will not be called after phy_stop().

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 6.1.64-1 | [DEBIAN-CVE-2023-52509](https://patchblox.com/security/data/fix/linux/debian-cve-2023-52509.md) | Mar 2, 2024 |
| Linux | linux Debian 13.5 (trixie) | 6.5.8-1 | [DEBIAN-CVE-2023-52509](https://patchblox.com/security/data/fix/linux/debian-cve-2023-52509.md) | Mar 2, 2024 |
| Linux | linux Debian 14 | 6.5.8-1 | [DEBIAN-CVE-2023-52509](https://patchblox.com/security/data/fix/linux/debian-cve-2023-52509.md) | Mar 2, 2024 |

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