CVE-2026-31678openvswitch: defer tunnel netdev_put to RCU release
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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In the Linux kernel, the following vulnerability has been resolved: openvswitch: defer tunnel netdev_put to RCU release ovs_netdev_tunnel_destroy() may run after NETDEV_UNREGISTER already detached the device. Dropping the netdev reference in destroy can race with concurrent readers that still observe vport->dev. Do not release vport->dev in ovs_netdev_tunnel_destroy(). Instead, let vport_netdev_free() drop the reference from the RCU callback, matching the non-tunnel destroy path and avoiding additional synchronization under RTNL.
- CVSS
- 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Analyzed
- Record last updated
- Oct 16, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from a9020fde67a6eb77f8130feff633189f99264db1 before 9d56aced21fb9c104e8a3f3be9b21fbafe448ffc; from a9020fde67a6eb77f8130feff633189f99264db1 before 42f0d3d81209654c08ffdde5a34b9b92d2645896; from a9020fde67a6eb77f8130feff633189f99264db1 before bbe7bd722bfaea36aab3da6cc60fb4a05c644643; from a9020fde67a6eb77f8130feff633189f99264db1 before 98b726ab5e2a4811e27c28e4d041f75bba147eab; from a9020fde67a6eb77f8130feff633189f99264db1 before b8c56a3fc5d879c0928f207a756b0f067f06c6a8; from a9020fde67a6eb77f8130feff633189f99264db1 before 6931d21f87bc6d657f145798fad0bf077b82486c | CNA record |
linux linux_kernel linux:linux_kernel | from 4.3 before 6.1.168; from 6.2 before 6.6.131; from 6.7 before 6.12.80; from 6.13 before 6.18.21; from 6.19 before 6.19.11; 7.0; 7.0; 7.0; and 2 more ranges | NVD |
References
- https://git.kernel.org/stable/c/9d56aced21fb9c104e8a3f3be9b21fbafe448ffcpatch
- https://git.kernel.org/stable/c/42f0d3d81209654c08ffdde5a34b9b92d2645896patch
- https://git.kernel.org/stable/c/bbe7bd722bfaea36aab3da6cc60fb4a05c644643patch
- https://git.kernel.org/stable/c/98b726ab5e2a4811e27c28e4d041f75bba147eabpatch
- https://git.kernel.org/stable/c/b8c56a3fc5d879c0928f207a756b0f067f06c6a8patch
- https://git.kernel.org/stable/c/6931d21f87bc6d657f145798fad0bf077b82486cpatch
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.