Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: net: gso: fix ownership in __udp_gso_segment In __udp_gso_segment the skb destructor is removed before segmenting the skb but the socket reference is kept as-is. This is an issue if the original skb is later orphaned as we can hit the following bug: kernel BUG at ./include/linux/skbuff.h:3312! (skb_orphan) RIP: 0010:ip_rcv_core+0x8b2/0xca0 Call Trace: ip_rcv+0xab/0x6e0 __netif_receive_skb_one_core+0x168/0x1b0 process_backlog+0x384/0x1100 __napi_poll.constprop.0+0xa1/0x370 net_rx_action+0x925/0xe50 The above can happen following a sequence of events when using OpenVSwitch, when an OVS_ACTION_ATTR_USERSPACE action precedes an OVS_ACTION_ATTR_OUTPUT action: 1. OVS_ACTION_ATTR_USERSPACE is handled (in do_execute_actions): the skb goes through queue_gso_packets and then __udp_gso_segment, where its destructor is removed. 2. The segments' data are copied and sent to userspace. 3. OVS_ACTION_ATTR_OUTPUT is handled (in do_execute_actions) and the same original skb is sent to its path. 4. If it later hits skb_orphan, we hit the bug. Fix this by also removing the reference to the socket in __udp_gso_segment.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected ad405857b174ed31a97982bb129c320d03321cf5 before 9f28205ddb76e86cac418332e952241d85fed0dc; affected ad405857b174ed31a97982bb129c320d03321cf5 before a2d1cca955ed34873e524cc2e6e885450d262f05; affected ad405857b174ed31a97982bb129c320d03321cf5 before 455217ac9db0cf9349b3933664355e907bb1a569; affected ad405857b174ed31a97982bb129c320d03321cf5 before e8db70537878e1bb3fd83e5abcc6feefc0587828; affected ad405857b174ed31a97982bb129c320d03321cf5 before 01a83237644d6822bc7df2c5564fc81b0df84358; affected ad405857b174ed31a97982bb129c320d03321cf5 before 084819b0d8b1bd433b90142371eb9450d657f8ca; affected ad405857b174ed31a97982bb129c320d03321cf5 before c32da44cc9298eaa6109e3fc2c2b4e07cc4bf11b; affected ad405857b174ed31a97982bb129c320d03321cf5 before ee01b2f2d7d0010787c2343463965bbc283a497f |
| Linux / Linux | affected 4.18; unaffected 0 before 4.18; unaffected 5.4.291 through 5.4.*; unaffected 5.10.235 through 5.10.*; unaffected 5.15.179 through 5.15.*; unaffected 6.1.131 through 6.1.*; unaffected 6.6.83 through 6.6.*; unaffected 6.12.19 through 6.12.*; unaffected 6.13.7 through 6.13.*; unaffected 6.14 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/9f28205ddb76e86cac418332e952241d85fed0dc
- https://git.kernel.org/stable/c/a2d1cca955ed34873e524cc2e6e885450d262f05
- https://git.kernel.org/stable/c/455217ac9db0cf9349b3933664355e907bb1a569
- https://git.kernel.org/stable/c/e8db70537878e1bb3fd83e5abcc6feefc0587828
- https://git.kernel.org/stable/c/01a83237644d6822bc7df2c5564fc81b0df84358
- https://git.kernel.org/stable/c/084819b0d8b1bd433b90142371eb9450d657f8ca
- https://git.kernel.org/stable/c/c32da44cc9298eaa6109e3fc2c2b4e07cc4bf11b
- https://git.kernel.org/stable/c/ee01b2f2d7d0010787c2343463965bbc283a497f
ADP enrichment
No English description supplied.
No English description supplied.