Description
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 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
ad405857b174ed31a97982bb129c320d03321cf5 to < 9f28205ddb76e86cac418332e952241d85fed0dcaffectedad405857b174ed31a97982bb129c320d03321cf5 to < a2d1cca955ed34873e524cc2e6e885450d262f05affectedad405857b174ed31a97982bb129c320d03321cf5 to < 455217ac9db0cf9349b3933664355e907bb1a569affectedad405857b174ed31a97982bb129c320d03321cf5 to < e8db70537878e1bb3fd83e5abcc6feefc0587828affectedad405857b174ed31a97982bb129c320d03321cf5 to < 01a83237644d6822bc7df2c5564fc81b0df84358affectedad405857b174ed31a97982bb129c320d03321cf5 to < 084819b0d8b1bd433b90142371eb9450d657f8caaffectedad405857b174ed31a97982bb129c320d03321cf5 to < c32da44cc9298eaa6109e3fc2c2b4e07cc4bf11baffectedad405857b174ed31a97982bb129c320d03321cf5 to < ee01b2f2d7d0010787c2343463965bbc283a497faffected
Linux Linux
Default version status: affected
4.18affected0 to < 4.18unaffected5.4.291 to ≤ 5.4.*unaffected5.10.235 to ≤ 5.10.*unaffected5.15.179 to ≤ 5.15.*unaffected6.1.131 to ≤ 6.1.*unaffected6.6.83 to ≤ 6.6.*unaffected6.12.19 to ≤ 6.12.*unaffected6.13.7 to ≤ 6.13.*unaffected6.14 to ≤ *unaffected
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 ↗
- https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html ↗
- https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html ↗
- https://cert-portal.siemens.com/productcert/html/ssa-019113.html ↗
- https://cert-portal.siemens.com/productcert/html/ssa-457936.html ↗