CVE-2026-53229 is a vulnerability in Linux Kernel
Published on June 25, 2026
net/mlx5e: xsk: Fix DMA and xdp_frame leak on XDP_TX xmit failure
In the Linux kernel, the following vulnerability has been resolved:
net/mlx5e: xsk: Fix DMA and xdp_frame leak on XDP_TX xmit failure
In the XSK branch of mlx5e_xmit_xdp_buff(), when sq->xmit_xdp_frame()
returns false (e.g. XDPSQ is full), the function returns without
unmapping the DMA address or freeing the xdp_frame allocated by
xdp_convert_zc_to_xdp_frame(). The xdpi_fifo push only happens on
success, so the completion path cannot recover these entries.
With CONFIG_DMA_API_DEBUG=y, the leak surfaces on driver unbind:
DMA-API: pci 0000:08:00.0: device driver has pending DMA
allocations while released from device [count=1116]
One of leaked entries details: [device address=0x000000010ffd7028]
[size=1534 bytes] [mapped with DMA_TO_DEVICE] [mapped as phy]
WARNING: kernel/dma/debug.c:881 at dma_debug_device_change+0x127/0x180
...
DMA-API: Mapped at:
debug_dma_map_phys+0x4b/0xd0
dma_map_phys+0xfd/0x2d0
mlx5e_xdp_handle+0x5ae/0xac0 [mlx5_core]
mlx5e_xsk_skb_from_cqe_mpwrq_linear+0xc4/0x170 [mlx5_core]
mlx5e_handle_rx_cqe_mpwrq+0xc1/0x290 [mlx5_core]
Add the missing unmap + xdp_return_frame, matching the cleanup already
done in mlx5e_xdp_xmit(). has_frags is rejected earlier in this branch,
so no per-frag unmap is needed.
Products Associated with CVE-2026-53229
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Affected Versions
Linux:- Version 84a0a2310d6de247335574649726cb000c7c0074 and below 7b3eeba50fbc3b45f279037c29a87a90e8bac1e1 is affected.
- Version 84a0a2310d6de247335574649726cb000c7c0074 and below 2789b74ae1f4b68333c9d5eec2f3354d07b16e61 is affected.
- Version 84a0a2310d6de247335574649726cb000c7c0074 and below 0aabca726b43d833721034e97d99efcc8237b22a is affected.
- Version 84a0a2310d6de247335574649726cb000c7c0074 and below b69004f5a6ad32da84d8aa5b23b9c0caafe6252e is affected.
- Version 5.3 is affected.
- Before 5.3 is unaffected.
- Version 6.12.94, <= 6.12.* is unaffected.
- Version 6.18.36, <= 6.18.* is unaffected.
- Version 7.0.13, <= 7.0.* is unaffected.
- Version 7.1, <= * is unaffected.