CVE-2026-53216
In the Linux kernel, the following vulnerability has been resolved: net: mvpp2: limit XDP frame size to the RX buffer mvpp2 has short and long BM pools, and short pool buffers can be smaller than PAGE_SIZE.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.50%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
In the Linux kernel, the following vulnerability has been resolved: net: mvpp2: limit XDP frame size to the RX buffer mvpp2 has short and long BM pools, and short pool buffers can be smaller than PAGE_SIZE. The XDP path nevertheless initializes every xdp_buff with PAGE_SIZE as frame size. XDP helpers use frame_sz to validate tail growth and to derive the hard end of the data area. Advertising PAGE_SIZE for short buffers can let bpf_xdp_adjust_tail() grow a packet past the real allocation, corrupting memory or later tripping skb tailroom checks. Initialize the XDP buffer with bm_pool->frag_size so XDP tailroom matches the actual buffer backing the packet.
- CVSS 3.1
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.50% probability · 41th percentile
- CISA KEV
- Not listed
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/3b8b0c3631b19faee53f0d15a49924129b063eecPatch
- https://git.kernel.org/stable/c/910617a4e67dbdd5fdb39d9dc6a51e491e1b2c3ePatch
- https://git.kernel.org/stable/c/9545cc5ef18ca22d031f2f47c157192460652359Patch
- https://git.kernel.org/stable/c/994bd2b58d2bd08aa97ec0836cc813cfcb00d749Patch
- https://git.kernel.org/stable/c/a3ee9231ccec6ec3be2de89c56f897055fd9eab1Patch
- https://git.kernel.org/stable/c/ec8e1e5842bc0dbd4c272761f4db3651eecd0339Patch
- https://git.kernel.org/stable/c/f3c6aa078927e6fe8121c9c591ddee8716c5305aPatch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.