CVE-2022-49972 xsk: Fix corrupted packets for XDP_SHARED_UMEM
A memory corruption flaw in the Linux kernel's XDP_SHARED_UMEM mode can lead to corrupted packets, potentially causing data exposure or denial of service.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2022-49972?
CVE-2022-49972 is a high-severity memory corruption vulnerability in Linux kernel, published on 18 Jun 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
xsk: Fix corrupted packets for XDP_SHARED_UMEM
Fix an issue in XDP_SHARED_UMEM mode together with aligned mode where packets are corrupted for the second and any further sockets bound to the same umem. In other words, this does not affect the first socket bound to the umem. The culprit for this bug is that the initialization of the DMA addresses for the pre-populated xsk buffer pool entries was not performed for any socket but the first one bound to the umem. Only the linear array of DMA addresses was populated. Fix this by populating the DMA addresses in the xsk buffer pool for every socket bound to the same umem.
Which versions are affected by CVE-2022-49972?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2022-49972?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2022-49972 being exploited?
There is no known exploitation of CVE-2022-49972 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as DEBIAN-CVE-2022-49972, GHSA-5h9q-vg2v-xg75, UBUNTU-CVE-2022-49972.