Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected e624d4ed4aa8cc3c69d1359b0aaea539203ed266 before 47baddc856ae7e93a565dd9deeb797999b179466; affected e624d4ed4aa8cc3c69d1359b0aaea539203ed266 before 07a4c11ee8ef4abcb39d922e9e410ae269671cdf; affected e624d4ed4aa8cc3c69d1359b0aaea539203ed266 before bccbab36ff228e0825eb85d9b0f9b8434cd0a399; affected e624d4ed4aa8cc3c69d1359b0aaea539203ed266 before c5b4f5efcb55c1af3fe44ff712d31b7fb098a831; affected e624d4ed4aa8cc3c69d1359b0aaea539203ed266 before a9bb2d9c798cb62a4050a991c27b752770c33afe; affected e624d4ed4aa8cc3c69d1359b0aaea539203ed266 before 51d07c12ca411e692c424ecdabf077f1e61a61be; affected e624d4ed4aa8cc3c69d1359b0aaea539203ed266 before aa496720618f1a6054f1c870bf10b4f6c99bf656 |
| Linux / Linux | affected 5.14; unaffected 0 before 5.14; unaffected 5.15.212 through 5.15.*; unaffected 6.1.178 through 6.1.*; unaffected 6.6.145 through 6.6.*; unaffected 6.12.96 through 6.12.*; unaffected 6.18.39 through 6.18.*; unaffected 7.1.4 through 7.1.*; unaffected 7.2 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/47baddc856ae7e93a565dd9deeb797999b179466
- https://git.kernel.org/stable/c/07a4c11ee8ef4abcb39d922e9e410ae269671cdf
- https://git.kernel.org/stable/c/bccbab36ff228e0825eb85d9b0f9b8434cd0a399
- https://git.kernel.org/stable/c/c5b4f5efcb55c1af3fe44ff712d31b7fb098a831
- https://git.kernel.org/stable/c/a9bb2d9c798cb62a4050a991c27b752770c33afe
- https://git.kernel.org/stable/c/51d07c12ca411e692c424ecdabf077f1e61a61be
- https://git.kernel.org/stable/c/aa496720618f1a6054f1c870bf10b4f6c99bf656
ADP enrichment
No English description supplied.
No references supplied.