CVE-2025-21926Medium· 5.5▾ SunlitIn 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 …
▾ Sunlit zone — Low / medium · no exploitation signal
impact 30.3 · likelihood 0 · exploitation 0
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Exploit-prediction probability, daily snapshots since Jul 14.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
Last analysed / modified upstream
0.2%
0.2% → 0.2%
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:
Fix this by also removing the reference to the socket in __udp_gso_segment.
linux_kernel >= 4.18, < 5.4.291linux_kernel >= 5.5, < 5.10.235linux_kernel >= 5.11, < 5.15.179linux_kernel >= 5.16, < 6.1.131linux_kernel >= 6.2, < 6.6.83linux_kernel >= 6.7, < 6.12.19linux_kernel >= 6.13, < 6.13.7linux_kernel = 6.14Upgrade past the affected range:
linux_kernel 6.13.7Connected by shared product, vendor, weakness, or advisory.
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