Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: net:emac/emac-mac: Fix a use after free in emac_mac_tx_buf_send In emac_mac_tx_buf_send, it calls emac_tx_fill_tpd(..,skb,..). If some error happens in emac_tx_fill_tpd(), the skb will be freed via dev_kfree_skb(skb) in error branch of emac_tx_fill_tpd(). But the freed skb is still used via skb->len by netdev_sent_queue(,skb->len). As i observed that emac_tx_fill_tpd() haven't modified the value of skb->len, thus my patch assigns skb->len to 'len' before the possible free and use 'len' instead of skb->len later.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected b9b17debc69d27cd55e21ee51a5ba7fc50a426cf before c7f75d11fe72913d2619f97b2334b083cd7bb955; affected b9b17debc69d27cd55e21ee51a5ba7fc50a426cf before dc1b438a35773d030be0ee80d9c635c3e558a322; affected b9b17debc69d27cd55e21ee51a5ba7fc50a426cf before 16d8c44be52e3650917736d45f5904384a9da834; affected b9b17debc69d27cd55e21ee51a5ba7fc50a426cf before 55fcdd1258faaecca74b91b88cc0921f9edd775d; affected b9b17debc69d27cd55e21ee51a5ba7fc50a426cf before 9dc373f74097edd0e35f3393d6248eda8d1ba99d; affected b9b17debc69d27cd55e21ee51a5ba7fc50a426cf before 8c06f34785068b87e2b560534c77c163d6c6dca7; affected b9b17debc69d27cd55e21ee51a5ba7fc50a426cf before e407495ba6788a67d1bd41714158c079e340879b; affected b9b17debc69d27cd55e21ee51a5ba7fc50a426cf before 6d72e7c767acbbdd44ebc7d89c6690b405b32b57 |
| Linux / Linux | affected 4.9; unaffected 0 before 4.9; unaffected 4.9.269 through 4.9.*; unaffected 4.14.233 through 4.14.*; unaffected 4.19.191 through 4.19.*; unaffected 5.4.119 through 5.4.*; unaffected 5.10.37 through 5.10.*; unaffected 5.11.21 through 5.11.*; unaffected 5.12.4 through 5.12.*; unaffected 5.13 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/c7f75d11fe72913d2619f97b2334b083cd7bb955
- https://git.kernel.org/stable/c/dc1b438a35773d030be0ee80d9c635c3e558a322
- https://git.kernel.org/stable/c/16d8c44be52e3650917736d45f5904384a9da834
- https://git.kernel.org/stable/c/55fcdd1258faaecca74b91b88cc0921f9edd775d
- https://git.kernel.org/stable/c/9dc373f74097edd0e35f3393d6248eda8d1ba99d
- https://git.kernel.org/stable/c/8c06f34785068b87e2b560534c77c163d6c6dca7
- https://git.kernel.org/stable/c/e407495ba6788a67d1bd41714158c079e340879b
- https://git.kernel.org/stable/c/6d72e7c767acbbdd44ebc7d89c6690b405b32b57
ADP enrichment
No English description supplied.
No references supplied.
No English description supplied.
- https://git.kernel.org/stable/c/c7f75d11fe72913d2619f97b2334b083cd7bb955
- https://git.kernel.org/stable/c/dc1b438a35773d030be0ee80d9c635c3e558a322
- https://git.kernel.org/stable/c/16d8c44be52e3650917736d45f5904384a9da834
- https://git.kernel.org/stable/c/55fcdd1258faaecca74b91b88cc0921f9edd775d
- https://git.kernel.org/stable/c/9dc373f74097edd0e35f3393d6248eda8d1ba99d
- https://git.kernel.org/stable/c/8c06f34785068b87e2b560534c77c163d6c6dca7
- https://git.kernel.org/stable/c/e407495ba6788a67d1bd41714158c079e340879b
- https://git.kernel.org/stable/c/6d72e7c767acbbdd44ebc7d89c6690b405b32b57