CVE-2024-27393 Affecting kernel-rt-kvm package, versions *

Note: Versions mentioned in the description apply only to the upstream kernel-rt-kvm package and not the kernel-rt-kvm package as distributed by Centos. See How to fix? for Centos:7 relevant fixed versions and status.

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

xen-netfront: Add missing skb_mark_for_recycle

Notice that skb_mark_for_recycle() is introduced later than fixes tag in commit 6a5bcd84e886 ("page_pool: Allow drivers to hint on SKB recycling").

It is believed that fixes tag were missing a call to page_pool_release_page() between v5.9 to v5.14, after which is should have used skb_mark_for_recycle(). Since v6.6 the call page_pool_release_page() were removed (in commit 535b9c61bdef ("net: page_pool: hide page_pool_release_page()") and remaining callers converted (in commit 6bfef2ec0172 ("Merge branch 'net-page_pool-remove-page_pool_release_page'")).

This leak became visible in v6.8 via commit dba1b8a7ab68 ("mm/page_pool: catch page_pool memory leaks").

• https://access.redhat.com/security/cve/CVE-2024-27393
• https://git.kernel.org/stable/c/037965402a010898d34f4e35327d22c0a95cd51f
• https://git.kernel.org/stable/c/27aa3e4b3088426b7e34584274ad45b5afaf7629
• https://git.kernel.org/stable/c/4143b9479caa29bb2380f3620dcbe16ea84eb3b1
• https://git.kernel.org/stable/c/7c1250796b6c262b505a46192f4716b8c6a6a8c6
• https://git.kernel.org/stable/c/c8b7b2f158d9d4fb89cd2f68244af154f7549bb4
• http://xenbits.xen.org/xsa/advisory-457.html
• http://www.openwall.com/lists/oss-security/2024/05/08/4