Description
In the Linux kernel, the following vulnerability has been resolved: tap: free page on error paths in tap_get_user_xdp() tap_get_user_xdp() rejects a frame shorter than ETH_HLEN with -EINVAL, and returns -ENOMEM when build_skb() fails. Both paths jump to the err label without freeing the page that vhost_net_build_xdp() allocated for the frame. tap_sendmsg() discards the per-buffer return value and always returns 0, so vhost_tx_batch() takes the success path and never frees the page; each rejected frame in a batch leaks one page-frag chunk. Free the page on both error paths, before the skb is built. This is the tap counterpart of the same leak in tun_xdp_one().
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
0efac27791ee068075d80f07c55a229b1335ce12 to < 8d03e65eb6cfbffec471a6b65416f93679bf3286affected0efac27791ee068075d80f07c55a229b1335ce12 to < f979971835dddbca86cf99e3b2e2b94a408a1ab2affected0efac27791ee068075d80f07c55a229b1335ce12 to < 3f52a86a482a69294c50a5a2a097bd6f4104990aaffected0efac27791ee068075d80f07c55a229b1335ce12 to < d30aac0fa00ca0afc3e08174cf7f974a66bdcf05affected0efac27791ee068075d80f07c55a229b1335ce12 to < d68eab61944a9b0826fa2e954e42db1aa3201b7aaffected0efac27791ee068075d80f07c55a229b1335ce12 to < e27c17346628cb56843a83f93ac63c314c00f388affected0efac27791ee068075d80f07c55a229b1335ce12 to < 18a84c35842e19cd3c5534d8cee73d31863f696daffected0efac27791ee068075d80f07c55a229b1335ce12 to < 3bcf7aec6a9d16438f2cec29f5d7c8d5b8edf9b2affected
Linux Linux
Default version status: affected
4.20affected0 to < 4.20unaffected5.10.259 to ≤ 5.10.*unaffected5.15.210 to ≤ 5.15.*unaffected6.1.176 to ≤ 6.1.*unaffected6.6.143 to ≤ 6.6.*unaffected6.12.94 to ≤ 6.12.*unaffected6.18.36 to ≤ 6.18.*unaffected7.0.12 to ≤ 7.0.*unaffected7.1 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/8d03e65eb6cfbffec471a6b65416f93679bf3286 ↗
- https://git.kernel.org/stable/c/f979971835dddbca86cf99e3b2e2b94a408a1ab2 ↗
- https://git.kernel.org/stable/c/3f52a86a482a69294c50a5a2a097bd6f4104990a ↗
- https://git.kernel.org/stable/c/d30aac0fa00ca0afc3e08174cf7f974a66bdcf05 ↗
- https://git.kernel.org/stable/c/d68eab61944a9b0826fa2e954e42db1aa3201b7a ↗
- https://git.kernel.org/stable/c/e27c17346628cb56843a83f93ac63c314c00f388 ↗
- https://git.kernel.org/stable/c/18a84c35842e19cd3c5534d8cee73d31863f696d ↗
- https://git.kernel.org/stable/c/3bcf7aec6a9d16438f2cec29f5d7c8d5b8edf9b2 ↗
- https://cert-portal.siemens.com/productcert/html/ssa-784472.html ↗