Description
In the Linux kernel, the following vulnerability has been resolved: tun: free page on build_skb failure in tun_xdp_one() When build_skb() fails in tun_xdp_one(), the function sets ret to -ENOMEM and jumps to the out label, which returns without freeing the page that vhost_net_build_xdp() allocated for the frame. As with the short-frame rejection path, tun_sendmsg() discards the per-buffer error and still returns total_len, so vhost_tx_batch() takes the success path and never frees the page. Each build_skb() failure in a batch leaks one page-frag chunk. Free the page before taking the error path, matching the put_page() the other error exits of tun_xdp_one() already perform.
CVSS breakdown
CVSS 3.1
Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Changed
Confidentiality
None
Integrity
None
Availability
High
Affected products
- Linux / Linux043d222f93ab8c76b56a3b315cd8692e35affb6c – 26fe549b5192536b6c1c68a2dfdc8c0dcf9fa4a9
- Linux / Linux043d222f93ab8c76b56a3b315cd8692e35affb6c – 793385c154771603b8671dd8338927221e9d8d78
- Linux / Linux043d222f93ab8c76b56a3b315cd8692e35affb6c – 2638a9c1521905bb5c5d1e95c8fbc09f79148ed7
- Linux / Linux043d222f93ab8c76b56a3b315cd8692e35affb6c – 60d9c0d6cdde5420d6483c921b16fe5465eb5238
- Linux / Linux043d222f93ab8c76b56a3b315cd8692e35affb6c – d16e38fac09a47bfcf98c1ad65a1bb53f94540f5
- Linux / Linux043d222f93ab8c76b56a3b315cd8692e35affb6c – aa308e9dbb9acb17cacdbbce9e4504f69bac8385
- Linux / Linux043d222f93ab8c76b56a3b315cd8692e35affb6c – 4fefc6156a162a9f50035c12091a5e5130c82c6e
- Linux / Linux043d222f93ab8c76b56a3b315cd8692e35affb6c – aa8963fdce667a42fb7f0bdd2909fadcab02f9a8
- Linux / Linux4.20 – 4.20
- Linux / Linux0 – 4.20
- Linux / Linux5.10.259 – 5.10.*
- Linux / Linux5.15.210 – 5.15.*
- Linux / Linux6.1.176 – 6.1.*
- Linux / Linux6.6.143 – 6.6.*
- Linux / Linux6.12.93 – 6.12.*
- Linux / Linux6.18.35 – 6.18.*
- Linux / Linux7.0.12 – 7.0.*
- Linux / Linux7.1 – *
References
- MISChttps://git.kernel.org/stable/c/26fe549b5192536b6c1c68a2dfdc8c0dcf9fa4a9
- MISChttps://git.kernel.org/stable/c/793385c154771603b8671dd8338927221e9d8d78
- MISChttps://git.kernel.org/stable/c/2638a9c1521905bb5c5d1e95c8fbc09f79148ed7
- MISChttps://git.kernel.org/stable/c/60d9c0d6cdde5420d6483c921b16fe5465eb5238
- MISChttps://git.kernel.org/stable/c/d16e38fac09a47bfcf98c1ad65a1bb53f94540f5
- MISChttps://git.kernel.org/stable/c/aa308e9dbb9acb17cacdbbce9e4504f69bac8385
- MISChttps://git.kernel.org/stable/c/4fefc6156a162a9f50035c12091a5e5130c82c6e
- MISChttps://git.kernel.org/stable/c/aa8963fdce667a42fb7f0bdd2909fadcab02f9a8