CVE-2026-64355

In the Linux kernel, the following vulnerability has been resolved: bpf: Reject fragmented frames in devmap Devmap broadcast redirects clone the packet for all but the last destination. For native XDP, that clone path copies only the linear xdp_frame data, while fragmented frames keep skb_shared_info in tailroom outside the linear area. Cloning such a frame leaves XDP_FLAGS_HAS_FRAGS set but without valid frag metadata, and the later free path can interpret uninitialized tail data as skb_shared_info, leading to an out-of-bounds access during frame return. Reject fragmented native XDP frames in dev_map_enqueue_clone(). Add the same restriction to the generic XDP clone path in dev_map_redirect_clone(). Generic XDP represents fragmented packets as nonlinear skbs, and rejecting them here keeps clone-based broadcast support aligned between native and generic XDP.

CVSS 3.1

9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS

0.5% chance of exploitation in the next 30 days; higher than 43% of CVEs (scores of 2026-10-25)

CWEs

CWE-125, CWE-787

Published

2026-07-25

Modified

2026-10-19

Record from

the NVD, synced 2026-10-21

Affected

• linux:linux_kernel

References

• https://git.kernel.org/stable/c/07a4c11ee8ef4abcb39d922e9e410ae269671cdf
• https://git.kernel.org/stable/c/47baddc856ae7e93a565dd9deeb797999b179466
• https://git.kernel.org/stable/c/51d07c12ca411e692c424ecdabf077f1e61a61be
• https://git.kernel.org/stable/c/a9bb2d9c798cb62a4050a991c27b752770c33afe
• https://git.kernel.org/stable/c/aa496720618f1a6054f1c870bf10b4f6c99bf656

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