CVE-2026-31678
openvswitch: defer tunnel netdev_put to RCU release
Reported by linux · Published April 25, 2026
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.
Fixed versions
Upgrade to a fixed version or later. Language registries are listed first, then Linux distributions, then vendor products.
| Package | Ecosystem | Fixed in |
|---|---|---|
| kernel-tools-libs-devel | errata.rockylinux.org | 6.12.0-211.67.1.el10, 4.18.0-553.173.1.el8, 0:6.12.0-211.67.1.el10_2.ppc64le |
| kernel-64k-debug-debuginfo | errata.rockylinux.org | 6.12.0-211.67.1.el10, 0:6.12.0-211.67.1.el10_2.aarch64 |
| kernel-rt-debug-devel | errata.rockylinux.org | 5.14.0-687.59.1.el9, 0:5.14.0-687.59.1.el9_8.aarch64 |
| libperf-debuginfo | errata.rockylinux.org | 5.14.0-687.59.1.el9, 0:5.14.0-687.59.1.el9_8.aarch64 |
| rv | errata.rockylinux.org | 6.12.0-211.67.1.el10, 0:6.12.0-211.67.1.el10_2.aarch64 |
| kernel-devel-matched | errata.rockylinux.org | 5.14.0-687.59.1.el9, 0:5.14.0-687.59.1.el9_8.aarch64 |
| python3-perf | Amazon Linux | 1:6.1.168-202.320.amzn2023 |
| kernel-debug-uki-virt | errata.rockylinux.org | 5.14.0-687.59.1.el9, 0:5.14.0-687.59.1.el9_8.x86_64 |
| kernel-modules-extra | errata.rockylinux.org | 5.14.0-687.59.1.el9, 4.18.0-553.173.1.el8, 0:5.14.0-687.59.1.el9_8.aarch64 |
| perf-debuginfo | errata.rockylinux.org | 6.12.0-211.67.1.el10, 5.14.0-687.59.1.el9, 4.18.0-553.173.1.el8, 0:6.12.0-211.67.1.el10_2.s390x, 0:6.12.0-211.67.1.el10_2.ppc64le, 0:5.14.0-687.59.1.el9_8.aarch64 |
| kernel-doc | errata.rockylinux.org | 6.12.0-211.67.1.el10, 0:6.12.0-211.67.1.el10_2.noarch |
| perf | errata.rockylinux.org | 5.14.0-687.59.1.el9, 4.18.0-553.173.1.el8, 0:5.14.0-687.59.1.el9_8.x86_64 |
49 more packages have a fixed version. See every fix in Lookup.
Risk scores
Affected products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | a9020fde67a6eb77f8130feff633189f99264db1, a9020fde67a6eb77f8130feff633189f99264db1, a9020fde67a6eb77f8130feff633189f99264db1 |
| Linux | Linux | 4.3, 0, 5.15.224 |
| amazon:2023 | python3-perf | 0 |
| amazon:2023 | kernel-tools | 0 |
| amazon:2023 | kernel-livepatch-6.12.80-105.147 | 0 |
| amazon:2023 | kernel-livepatch-6.18.25-52.107 | 0 |
| amazon:2023 | kernel6.12-tools | 0 |
| amazon:2023 | kernel6.18-headers | 0 |
| amazon:2023 | kernel-libbpf-devel | 0 |
| amazon:2023 | kernel6.18-modules-extra-common | 0 |
| amazon:2023 | bpftool | 0 |
| amazon:2023 | kernel6.12-headers | 0 |
| amazon:2023 | perf6.18 | 0 |
| amazon:2023 | bpftool6.12 | 0 |
| amazon:2023 | kernel | 0 |
| amazon:2023 | kernel-devel | 0 |
| amazon:2023 | kernel6.18-modules-extra | 0 |
| amazon:2023 | kernel6.12-devel | 0 |
| amazon:2023 | python3-perf6.12 | 0 |
| amazon:2023 | kernel6.18-devel | 0 |
…and 23 more
Timeline
- Apr 25, 2026 CVE Published
- Apr 27, 2026 Security Advisory (104 in total, the first dated here)
- May 18, 2026 EPSS Score (22 in total, the first dated here)
- Jul 19, 2026 Coalition ESS Score
- Aug 11, 2026 Distribution Patch (102 in total, the first dated here)
- Oct 30, 2026 CVE Updated
Query this with the API
The same record, from the CLI:
vulnetix vdb vuln CVE-2026-31678
vulnetix vdb fixes CVE-2026-31678Or with curl, using the org id and key from your account page:
curl -s -H "Authorization: ApiKey ${VULNETIX_ORG_ID}:${VULNETIX_API_KEY}" \
"https://api.vdb.vulnetix.com/v2/vuln/CVE-2026-31678/fixes/registry"The Community plan is free and allows 50 queries a day. Get a free API key · API quickstart