On Mon, 29 Jul 2024 16:32:36 +0200, Greg Kroah-Hartman wrote:

In the Linux kernel, the following vulnerability has been resolved:

udp: Set SOCK_RCU_FREE earlier in udp_lib_get_port().

[...]

We had the same bug in TCP and fixed it in commit 871019b22d1b ("net: set SOCK_RCU_FREE before inserting socket into hashtable").

Let's apply the same fix for UDP.

[...]

The Linux kernel CVE team has assigned CVE-2024-41041 to this issue.

Affected and fixed versions

Issue introduced in 4.20 with commit 6acc9b432e67 and fixed in 5.4.280 with commit 7a67c4e47626 Issue introduced in 4.20 with commit 6acc9b432e67 and fixed in 5.10.222 with commit 9f965684c57c

These versions don't have the TCP fix backported. Please do so.

Thanks, Siddh