Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: vsock/virtio: bind uarg before filling zerocopy skb virtio_transport_send_pkt_info() allocates or reuses the zerocopy uarg before entering the send loop, but virtio_transport_alloc_skb() still fills the skb before it inherits that uarg. When fixed-buffer vectored zerocopy hits MAX_SKB_FRAGS, io_sg_from_iter() may partially attach managed frags and return -EMSGSIZE. The rollback path call kfree_skb() to free an skb that carries SKBFL_MANAGED_FRAG_REFS but no uarg, so skb_release_data() falls through to ordinary frag unref. Pass the uarg into virtio_transport_alloc_skb() and bind it immediately before virtio_transport_fill_skb(). This keeps control or no-payload skbs untouched while ensuring success and rollback share one lifetime rule.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 581512a6dc939ef122e49336626ae159f3b8a345 before 72194f65050958e4c8e069adb6c5d89ef81ca197; affected 581512a6dc939ef122e49336626ae159f3b8a345 before b62e2b2b4a50953ca952f3cd3f77dd62dc50fd5d; affected 581512a6dc939ef122e49336626ae159f3b8a345 before 5d317573f1d48e76cce5fb6250452b6e4102e0fb; affected 581512a6dc939ef122e49336626ae159f3b8a345 before 1e584c304cfb94a759417130b1fc6d30b30c4cce |
| Linux / Linux | affected 6.7; unaffected 0 before 6.7; unaffected 6.12.97 through 6.12.*; unaffected 6.18.35 through 6.18.*; unaffected 7.0.12 through 7.0.*; unaffected 7.1 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/72194f65050958e4c8e069adb6c5d89ef81ca197
- https://git.kernel.org/stable/c/b62e2b2b4a50953ca952f3cd3f77dd62dc50fd5d
- https://git.kernel.org/stable/c/5d317573f1d48e76cce5fb6250452b6e4102e0fb
- https://git.kernel.org/stable/c/1e584c304cfb94a759417130b1fc6d30b30c4cce
ADP enrichment
No English description supplied.
No references supplied.