CVE-2026-64355bpf: Reject fragmented frames in devmap
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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
- 9.8 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Analyzed
- Record last updated
- Oct 16, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from e624d4ed4aa8cc3c69d1359b0aaea539203ed266 before 47baddc856ae7e93a565dd9deeb797999b179466; from e624d4ed4aa8cc3c69d1359b0aaea539203ed266 before 07a4c11ee8ef4abcb39d922e9e410ae269671cdf; from e624d4ed4aa8cc3c69d1359b0aaea539203ed266 before bccbab36ff228e0825eb85d9b0f9b8434cd0a399; from e624d4ed4aa8cc3c69d1359b0aaea539203ed266 before c5b4f5efcb55c1af3fe44ff712d31b7fb098a831; from e624d4ed4aa8cc3c69d1359b0aaea539203ed266 before a9bb2d9c798cb62a4050a991c27b752770c33afe; from e624d4ed4aa8cc3c69d1359b0aaea539203ed266 before 51d07c12ca411e692c424ecdabf077f1e61a61be; from e624d4ed4aa8cc3c69d1359b0aaea539203ed266 before aa496720618f1a6054f1c870bf10b4f6c99bf656 | CNA record |
linux linux_kernel linux:linux_kernel | from 5.14 before 5.15.212; from 5.16 before 6.1.178; from 6.2 before 6.6.145; from 6.7 before 6.12.96; from 6.13 before 6.18.39; from 6.19 before 7.1.4 | NVD |
References
- https://git.kernel.org/stable/c/47baddc856ae7e93a565dd9deeb797999b179466patch
- https://git.kernel.org/stable/c/07a4c11ee8ef4abcb39d922e9e410ae269671cdfpatch
- https://git.kernel.org/stable/c/bccbab36ff228e0825eb85d9b0f9b8434cd0a399patch
- https://git.kernel.org/stable/c/c5b4f5efcb55c1af3fe44ff712d31b7fb098a831patch
- https://git.kernel.org/stable/c/a9bb2d9c798cb62a4050a991c27b752770c33afepatch
- https://git.kernel.org/stable/c/51d07c12ca411e692c424ecdabf077f1e61a61bepatch
- https://git.kernel.org/stable/c/aa496720618f1a6054f1c870bf10b4f6c99bf656patch
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.