CVE-2024-26953

/// Technical description

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

net: esp: fix bad handling of pages from page_pool

When the skb is reorganized during esp_output (!esp->inline), the pages

coming from the original skb fragments are supposed to be released back

to the system through put_page. But if the skb fragment pages are

originating from a page_pool, calling put_page on them will trigger a

page_pool leak which will eventually result in a crash.

This leak can be easily observed when using CONFIG_DEBUG_VM and doing

ipsec + gre (non offloaded) forwarding:

BUG: Bad page state in process ksoftirqd/16 pfn:1451b6

page:00000000de2b8d32 refcount:0 mapcount:0 mapping:0000000000000000 index:0x1451b6000 pfn:0x1451b6

flags: 0x200000000000000(node=0|zone=2)

page_type: 0xffffffff()

raw: 0200000000000000 dead000000000040 ffff88810d23c000 0000000000000000

raw: 00000001451b6000 0000000000000001 00000000ffffffff 0000000000000000

page dumped because: page_pool leak

Modules linke

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References